/**
* 所选时间段范围内每7天的wifi连接数与注册人数
* @param [type] $station [description]
* @param [type] $sdate [description]
* @param [type] $edate [description]
* @return [type] [description]
*/
public function wifidataweek($station, $sdate, $edate)
{
$obj = new Psys_StationRule();
return $obj->wifidataweek($station, $sdate, $edate);
}