PE100 the entrance detector of escalators (hereinafter referred to as the detector) is one kind of based on analog signals, digital signal processing as the foundation, then through the object imaging principle to design the high performance intelligent detection devices. The product is intended for energy-efficient escalator supporting the use and design, the detector installed to the entrance of the escalator, when passengers into the reserve area, the detector automatically send escalator start signals, escalator according to the signal start the elevator, when passengers leave after the escalator, the detector send stop signals, escalator according to the signal to stop the elevator, so as to achieve the purpose of saving energy.