Automatic parking identification system, subway market entry and exit gate machine and other special equipment used for all kinds of access and exit management, we can use, electric road gate can be realized by Remote Control Landing Rod, can also be through the parking lot management system (that is, IC card management system) to implement automatic management state. How to use the brake lever to open it, where the electromagnet generated inside the function is very large. Taking three-roller gate as an example, the working principle of the full-automatic three-roller gate movement is as follows: 1. The base of the movement is supported by a 1.5 mm square triangle bracket; A lot of the guys in the business use metal plates. 2. The movement is mainly composed of two 24V, 15W square electromagnets (opening and closing) , which are normally not connected with electricity. After receiving the opening signal, the voltage of opening and opening the lock is stimulated to open 24V, the voltage of opening and opening the lock is kept at 12V, the power is not supplied after passing through and a 12V, 3w round electromagnet (pole-drop bracket, power-off Pole) a travel switch and hydraulic damper (to reduce impact force, noise, noise 70 DB (> 30 DB < 50 DB)) , turntable and Gate Pole; 3, electromagnet working principle: Coil through 24V weak electricity, become artificial electromagnet, adsorption brake lock arm unlock, coil power cut, lock arm reset, stuck gear cam. 4, normally open state adjustment: Manual adjustment and Electric Control Adjustment, manual adjustment is to adjust the electromagnet tail screw; electric control adjustment has been to electromagnet solenoid power.