Live Update And Yii Framework

Hi all.

I'm working in a small web application where I have to display some sensors data, static and dynamic
I'm using YII as php framework. for the static it's ok I can display 5 series from different 5 sensors in the same chart with this code
(user should choose a rand of time and the data will be fetched from the corresponding mysql table)

YII controller

public function actionInfo()
	{
		if(isset($_POST['beamId']))
			$beamId = $_POST['beamId'];
			
		$modelBeam=Beam::model()->findBySql('SELECT * FROM poutre where poutre_id = "'.$beamId.'"');
		
		if(count($modelBeam)<1)
			throw new CHttpException(' : Beam not found !','Make sure that you entered a valid beam');
			
		$modelResponsible=Responsible::model()->findBySql('SELECT * FROM responsable where responsable_id = "'.$modelBeam['responsable_id'].'"');		
        $modelHistory=BeamHistory::model()->findAllBySql('SELECT * FROM historique_poutre where poutre_id = "'.$beamId.'" ORDER BY  historique_poutre_date DESC ');		
		
  
		$this->render('info',array('modelBeam'=>$modelBeam,'modelResponsible'=>$modelResponsible,'modelHistory'=>$modelHistory,));
	}


public function actionGetSensorsData($beamId,$sDate,$eDate)
	{
		$result = array();
	
		header('Content-Type: application/json; charset="UTF-8"');
		
		// get all sensors 
		$sensorsIds=Sensor::model()->findAllBySql('SELECT capteur_id FROM capteur where poutre_id="'.$beamId.'";');
		
		foreach ($sensorsIds as $s)
		{	
		
		$sResult = array();
		
			
			$modelSensors = SensorInfo::model()->findAllBySql('SELECT * FROM information_capteur  where capteur_id= "'.$s['capteur_id'].'" and

			"'.$sDate.'" <= information_capteur_temps and 
			
			information_capteur_temps <= "'.$eDate.'" 
			
			order by information_capteur_temps ASC;');
			
			
			foreach($modelSensors as $res){
			
			              	$sResult[] = array(($res['information_capteur_temps']),intval($res['information_capteur_valeur']));
			                                }
											
			$data= array('data'=>$sResult);
			$name = array('name'=>$s['capteur_id']);
			$result[]=array('name'=>$s['capteur_id'],'data'=>$sResult);
			
			
	    }	
			 
		$json = CJSON::encode($result);
		echo $json ;
		Yii::app()->end();		
		
	}

and in my view info.php

$(document).ready(function(){	
	var startDateTextBox = $('#startDate');
	var endDateTextBox = $('#endDate');
	$("#btnSubmit").click(function() {
		if(startDateTextBox.val()!="" && endDateTextBox.val()!=""){
			$.ajax({
				type: "get",
				url: "<?php echo CController::createUrl('beam/GetSensorsData'); ?>",
				data: {"beamId" : "<?php echo $modelBeam['poutre_id'] ;?>" , "sDate": $('#startDate').val() , "eDate": $('#endDate').val()},
				dataType:"json",
				success: function(response, status) {					
					var chart;						
					chart = new Highcharts.Chart({
					 
						chart: {
						 
							renderTo: 'container',
							type: 'spline'
						},
						title: {
							text: 'Snow depth in the Vikjafjellet mountain, Norway'
						},
						subtitle: {
							text: 'An example of irregular time data in Highcharts JS'
						},
						xAxis: {
							type: 'datetime',
							  dateTimeLabelFormats: { 
							  second: '%H:%M:%S',
	                          minute: '%H:%M',
	                          hour: '%H:%M',
								 // month: '%e. %b',
								  //year: '%b'
							 },
							tickPixelInterval: 150,
				             maxZoom: 10 * 1,
						   
						},
						yAxis: {
							title: {
								text: 'Snow depth (m)'
								 
							},
						 
						},
						tooltip: {
							formatter: function() {
									return '<b>'+ 'Lead' + this.series.name +'</b><br/>'+
									Highcharts.dateFormat('%H:%M:%S:%m',this.x) +'<br/>'+
									Highcharts.numberFormat(this.y,0);
							}
						},
						
						series: response
					});						
				},
				error: function (response, status) {
						alert("An error occured while loading data!");
				}
			});
		} 
		
		else 
		
		{
			alert("Choose date range!")
		       }
	});
//

////

for dynamic update using ajax call (from only one sensor ) I get always an error with this code
error here PHP Error [8] Undefined index: information_capteur_temps , information_capteur_temps is the column where I store the time

controller

public function actionLive()
	{
		if(isset($_POST['beamId']))
			$beamId = $_POST['beamId'];
			
		$modelBeam=Beam::model()->findBySql('SELECT * FROM poutre where poutre_id = "'.$beamId.'"');
		
		if(count($modelBeam)<1)
			throw new CHttpException(' : Beam not found !','Make sure that you entered a valid beam');
			
			
			
			$modelSensors = SensorInfo::model()->findAllBySql('SELECT * FROM information_capteur where  capteur_id= "I" order by information_capteur_temps ASC;' );
			
			
		 
		
		 $this->render('live',array('modelSensors'=>$modelSensors ,'modelBeam'=>$modelBeam)) ;
	}
public function actionGetSensorsDataLive($beamId,$sensId='I')
	{
		$result = array();
	
		header('Content-Type: application/json; charset="UTF-8"');
	 
	 	$sResult = array();
		
			$modelSensors = SensorInfo::model()->findAllBySql('SELECT * FROM information_capteur  where  capteur_id= "I" ');
			
	 
			 $sResult[] = array(($modelSensors['information_capteur_temps']),intval($modelSensors['information_capteur_valeur'])); // error here  PHP Error [8] Undefined index: information_capteur_temps
		 	 
			
			$data= array('data'=>$sResult);
			
			//$name = array('name'=>$s['capteur_id']);
			
						$result[]=array('data'=>$sResult);

	   
	
			 	
		$json = CJSON::encode($result);
		echo $json ;
		Yii::app()->end();		
		
	}

my view live.php

 function requestData() {
     $.ajax ({
                type:"get" ,
				url: "<?php echo CController::createUrl('beam/GetSensorsDataLive'); ?>",
				data: {"beamId" : "<?php echo $modelBeam['poutre_id'] ;?>"},
			 	dataType: "json",
				
              success: function(response,point) {
              
              var series = chart.series[0],
			  
			  shift = series.data.length > 20;// shift if the series is longer than 20
              chart.series[0].addPoint( eval(point),true, false); // add the point
              setTimeout(requestData, 1000);    // call it again after one second
           
                                       },
                              
          cache: false
        });
       
		  }  
		  
		
	 
	  $(document).ready(function() {
	  	 var chart;
		 
            chart = new Highcharts.Chart({
            chart: {
                renderTo: 'graph',
                type: 'spline',
                marginRight: 70,
                events: {
                    load: requestData   
                }
            },
         
         title: {
                text: 'ID 1000000 sensors 0'
            },
            xAxis: {
              type: 'datetime',
                //tickPixelInterval: 100
			tickPixelInterval: 150,
				maxZoom: 10 * 1

            },
            yAxis: {
                title: {
                    text: 'Peaks Values'
                },
				
              /*     plotLines: [{

                    value: 0,

                    width: 1,

                    color: '#808080'

                }]; */

            },
			
			  tooltip: {

                formatter: function() {

                        return '<b>'+ this.series.name +'</b><br/>'+

                        Highcharts.dateFormat('%H:%M:%S:%m', this.x) +'<br/>'+

                        Highcharts.numberFormat(this.y, 2);

                }
       
            },  
		 
			
                        series: [{
                name: 'Live Data   ',
                 data:[] 
            }]
         
        });
 

    });

Any help or comments would be appreciated
I'm pretty sure that is related to my db query but I couldn't find it
many thanks in advance