Ground induction coil keeping door opening system of freight elevator

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Ground induction coil keeping door opening system of freight elevator

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CHEN XUEFENG / ZHENG WEI / LIANG CHANGHUA

The invention provides a freight elevator ground induction coil door opening keeping system which comprises a ground induction coil arranged in a groove preset in front of an elevator door and a ground induction coil signal box arranged on the outer wall face of the elevator door. The ground induction coil and the ground induction coil signal box form a resonance circuit, when a metal object is located above the ground induction coil, the frequency of the resonance circuit is increased relative to the normal state, and then the ground induction coil signal box generates an elevator calling door opening maintaining instruction. According to the freight elevator ground induction coil door opening keeping system, when a metal object passes through the position above the ground induction coil, the frequency of the resonance circuit below the metal object is increased, so that the elevator calling door opening keeping instruction is generated, automatic elevator calling can be completed without manually pressing an elevator door opening key, use is convenient, and the automation degree is high.

本发明提供的一种载货电梯地感线圈保持开门系统，包括设置于电梯门前预设的沟槽中的地感线圈、设置于电梯门外壁面上的地感线圈信号盒，地感线圈信号盒通过导线与电梯外呼盒的指令板并联，地感线圈和地感线圈信号盒构成谐振电路，有金属物位于地感线圈上方时，所述谐振电路的频率相对于常态下升高，进而使得地感线圈信号盒生成呼梯开门维持指令。本发明提供的载货电梯地感线圈保持开门系统，金属物经过地感线圈上方时，引起下方的谐振电路频率升高，从而生成呼梯开门维持指令，无需人员手动按压电梯开门按键，便可以完成自动呼梯，使用方便，自动化程度高。