Abstract: Largely applied for the toe plate of Fengning pumped storage power station, curtain grouting easily brings about deformation to the toe plate under excessive pressure. Such uplift deformation of the toe plate requires consecutive monitoring for 24 hours a day. Nevertheless, current devices for uplift monitoring costs 8 hours to be fully charged, while only works uninterruptedly for 3-4 hours. In view of this, the working mode of the device was adjusted through micro-control according to the variation of monitoring value, and fast charging was designed by adjusting the charging current using PWM. The charging time was reduced to 1.8 hours, whereas the consecutive working time of the device elongated to be 134 hours, and meanwhile the average working current was reduced, remarkably enhancing the monitoring efficiency.

Key words: uplift monitoring device, power supply management, curtain grouting, deformation of toe plate, fast charging, Mas law