E.vandenberge: Redirected page to Balance Board

2015-08-10T07:45:13Z

Redirected page to Balance Board

E.vandenberge: Replaced content with "==See Also== *Balance Board"

2015-07-09T10:08:23Z

Replaced content with "==See Also== *Balance Board"

E.vandenberge: /* Python software */

2015-07-01T15:02:52Z

Python software

P.dewater at 14:13, 26 March 2015

2015-03-26T14:13:15Z

P.dewater at 14:13, 26 March 2015

2015-03-26T14:13:00Z

P.dewater at 10:03, 25 March 2015

2015-03-25T10:03:27Z

P.dewater at 09:04, 25 March 2015

2015-03-25T09:04:23Z

P.dewater at 08:59, 25 March 2015

2015-03-25T08:59:05Z

P.dewater at 08:57, 25 March 2015

2015-03-25T08:57:48Z

P.dewater at 08:57, 25 March 2015

2015-03-25T08:57:37Z

← Older revision		Revision as of 07:45, 10 August 2015
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−	~~==See Also==~~	+	#REDIRECT [[Balance Board]]
−	*[[Balance Board]]

← Older revision		Revision as of 10:08, 9 July 2015
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−	= ~~Balance board =~~	+	==See Also==
−	{\|	+	*[[Balance Board]]
−	\|-
−	~~\| [[File:balanceBoard1.jpg\|300px\|Image: 300 pixels]]~~
−	\|}
−
−	~~== Introduction ==~~
−
−	A balance board(force platform) is commonly used in motor control labs and neurologic clinics. They essentially consist of a set of finely calibrated scales, measuring mechanical forces. The pattern of forces can be used to derive body position, at a high spatial and temporal resolution.
−
−	~~== Description ==~~
−
−	~~There are several boards specified up to 1M2 and 0,5M2 with a sub-millimeter spatial resolution and a 200 hz temporal resolution.~~
−
−	A typical balance board records at a high spatial and temporal resolution. Regarding spatial resolution: a platform can detect changes from a few sub-millimeters (freezing) to at least 500 centimeter (forward or backward steps). The platform records reliably over four vertical forces. Regarding temporal resolution: the signals are typically sampled at 200 Hz. Even though the system allows even higher sampling rates, in practice 100 Hz is sufficient.
−
−	The pressure sensors derive directly from the wii balance board. Each sensor has a maximum pressure of 120Kg. In-house electronics is build to get a clean amplification from the sensors. A National instruments card, USB-6221, takes care of the A/D conversion and connects with usb to a pc. The force plate can be integrated into existing systems for stimulus presentation and for recording bodily signals such as EEG, EMG and heart rate. In practice, this means that the systems are time-locked within millisecond accuracy.
−
−	~~== Instructions ==~~
−
−	~~Find the BalanceboardCalibration manual here [[Media:SOP_1_BalanceboardCalibration.pdf]]~~
−
−	~~Find the BalanceBoardBaseline manual here [[Media:SOP_2_BalanceBoardBaseline.pdf]]~~
−
−	~~Find the InstructionPosture manual here [[Media:SOP_3_InstructionPosture.pdf]]~~
−
−	~~== Technical design ==~~
−	{\|
−	\|-
−	~~\| [[File:Capture.JPG\|600px\|Image: 600 pixels]]~~
−	\|}
−	~~Find the national instruments specifications manual here [[Media:NI_USB-6221.pdf]]~~
−
−	~~== National instruments settings ==~~
−	{\|
−	\|-
−	~~\| [[File:Capture2.JPG\|600px\|Image: 600 pixels]]~~
−	\|}
−
−	~~== Presentation software ==~~
−
−	~~<nowiki>~~
−	~~sub runtrials_national begin~~
−
−	~~# The dio_device will setup NI-DAQmx device number 1 "Dev1"~~
−	~~dio_device card = new dio_device(ni_dio_device, 1, 0 );~~
−	~~#int id = card.acquire_analog_input( "MyVoltageOutTask" );~~
−	~~int id1 = card.acquire_analog_input( "ForceMeasurement,Voltage_0" );~~
−	~~int id2 = card.acquire_analog_input( "ForceMeasurement,Voltage_1" );~~
−	~~int id3 = card.acquire_analog_input( "ForceMeasurement,Voltage_2" );~~
−	~~int id4 = card.acquire_analog_input( "ForceMeasurement,Voltage_3" );~~
−	~~count_old = response_manager.total_response_count();~~
−	~~loop~~
−	~~until false~~
−	~~begin~~
−	~~if response_manager.total_response_count() > count_old then~~
−	~~count_old = response_manager.total_response_count();~~
−	~~calibrate_board = true;~~
−	~~end;~~
−
−	~~message_scale[1]~~ = ~~round(round(card.read_analog( id1, 1000.0 ),6) * 1000.0, 0);~~
−	~~message_scale[2]~~ = ~~round(round(card.read_analog( id2, 1000.0 ),6) * 1000.0, 0);~~
−	~~message_scale[3]~~ = ~~round(round(card.read_analog( id3, 1000.0 ),6) * 1000.0, 0);~~
−	~~message_scale[4] = round(round(card.read_analog( id4, 1000.0 ),6)~~ * ~~1000.0, 0);~~
−
−	~~if calibrate_board then~~
−	~~zero_scale_left_up = message_scale~~[~~left_up];~~
−	~~zero_scale_left_down = message_scale[left_down];~~
−	~~zero_scale_right_up = message_scale[right_up];~~
−	~~zero_scale_right_down = message_scale[right_down];~~
−	~~calibrate_board = false;~~
−	~~end;~~
−
−	~~message_scale[left_up] = message_scale[left_up] - zero_scale_left_up;~~
−	~~message_scale[left_down] = message_scale[left_down] - zero_scale_left_down;~~
−	~~message_scale[right_up] = message_scale[right_up] - zero_scale_right_up;~~
−	~~message_scale[right_down] = message_scale[right_down] - zero_scale_right_down;~~
−	~~t_scale11.set_caption(string(message_scale[left_up]));~~
−	~~t_scale11.redraw();~~
−	~~t_scale22.set_caption(string(message_scale[left_down]));~~
−	~~t_scale22.redraw();~~
−	~~t_scale33.set_caption(string(message_scale[right_up]));~~
−	~~t_scale33.redraw();~~
−	~~t_scale44.set_caption(string(message_scale[right_down]));~~
−	~~t_scale44.redraw();~~
−
−	~~pos_dot_x = (message_scale[right_up] + message_scale[right_down]) - message_scale[left_up] + message_scale[left_down]);~~
−	~~pos_dot_y = (message_scale[left_up] + message_scale[right_up]) - message_scale[left_down] + message_scale[right_down]);~~
−	~~p_balance.add_part( balance_pos, (pos_dot_x * 1.0), (pos_dot_y * 1.0));~~
−	~~t_coord.set_caption(string(pos_dot_x)+","+string(pos_dot_y));~~
−	~~t_coord.redraw();~~
−
−	~~p_balance.present();~~
−	~~p_balance.remove_part( 8 );~~
−	~~end;~~
−	~~card.release_analog_input( id1 );~~
−	~~card.release_analog_input( id2 );~~
−	~~card.release_analog_input( id3 );~~
−	~~card.release_analog_input( id4 );~~
−	~~end;~~
−	~~</nowiki>~~
−
−	~~== Python software ==~~
−
−	~~<syntaxhighlight lang="python">~~
−	~~from PyDAQmx import Task~~
−	from PyDAQmx.DAQmxConstants import *
−	from PyDAQmx.DAQmxTypes import *
−	~~import numpy~~
−	~~import msvcrt~~
−	~~import time~~
−
−	~~times =~~ []
−	~~try :~~
−	~~freq = 100.0 # Hz~~
−	~~numinputs = 4~~
−
−	~~analog_input = Task()~~
−	~~read = int32()~~
−	~~timer= time.clock()~~
−	~~running = True~~
−
−	~~data = numpy.zeros((numinputs,), dtype=numpy.float64)~~
−
−	~~#DAQmx Configure Code~~
−	~~analog_input.CreateAIVoltageChan("Dev1/ai0:%i" % (numinputs - 1), None, DAQmx_Val_RSE, -10.0,10.0,DAQmx_Val_Volts,None)~~
−	~~#analog_input.CfgInputBuffer(0)~~
−	~~#analog_input.CfgSampClkTiming("",freq,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000)~~
−
−	~~analog_input.StartTask()~~
−	~~datalist = [~~]
−	~~while running:~~
−	~~#DAQmx Start Code~~
−
−
−
−	~~timeBeforeRead = time.clock()~~
−	~~analog_input.ReadAnalogF64(-1,10.0,DAQmx_Val_GroupByChannel,data,numinputs*2,byref(read),None)~~
−	~~ser.write('S')~~
−	~~line = ser.readline()~~
−
−	~~time.sleep((1 / freq) - (time.clock()- timeBeforeRead))~~
−
−	~~times.append(timeBeforeRead - time.clock())~~
−
−
−	~~if msvcrt.kbhit():~~
−	~~running = False~~
−
−
−	~~finally :~~
−	~~print "Stop"~~
−	~~t = numpy.array(times)~~
−	~~deviation = numpy.mean(abs(t - numpy.mean(t)))~~
−	~~maxdeviation = max(abs(t-numpy.mean(t)))~~
−
−	~~print numpy.mean(t), deviation , maxdeviation~~
−
−
−	~~analog_input.StopTask();~~
−	~~</syntaxhighlight>~~

@@ Line 103: / Line 103: @@
 == Python software ==
-  <nowiki>
+  <syntaxhighlight lang="python">
 from PyDAQmx import Task
 from PyDAQmx.DAQmxConstants import *
@@ Line 152: / Line 152: @@
      print "Stop"
      t = numpy.array(times)
-     afwijking = numpy.mean(abs(t - numpy.mean(t)))
+     deviation = numpy.mean(abs(t - numpy.mean(t)))
-     maxafwijking = max(abs(t-numpy.mean(t)))
+     maxdeviation  = max(abs(t-numpy.mean(t)))
-     print numpy.mean(t), afwijking, maxafwijking
+     print numpy.mean(t), deviation , maxdeviation
      analog_input.StopTask();
-  </nowiki>
+  </syntaxhighlight>

@@ Line 103: / Line 103: @@
 == Python software ==
-<nowiki>
+ <nowiki>
 from PyDAQmx import Task
 from PyDAQmx.DAQmxConstants import *
@@ Line 159: / Line 159: @@
      analog_input.StopTask();
-</nowiki>
+ </nowiki>

@@ Line 40: / Line 40: @@
 == Presentation software ==
-<nowiki>
+ <nowiki>
 sub runtrials_national begin
@@ Line 99: / Line 99: @@
 	card.release_analog_input( id4 );
 end;
-</nowiki>
+ </nowiki>
 == Python software ==

@@ Line 2: / Line 2: @@
 {|
 |-
-| [[File:balanceBoard.jpg|200px|Image: 200 pixels]]
+| [[File:balanceBoard1.jpg|300px|Image: 300 pixels]]
 |}

@@ Line 30: / Line 30: @@
 | [[File:Capture.JPG|600px|Image: 600 pixels]]
 |}
 == National instruments settings ==

@@ Line 34: / Line 34: @@
 {|
 |-
-| [[File:Capture2.JPG|200px|Image: 200 pixels]]
+| [[File:Capture2.JPG|600px|Image: 600 pixels]]
 |}

@@ Line 28: / Line 28: @@
 {|
 |-
-| [[File:Capture.JPG|200px|Image: 200 pixels]]
+| [[File:Capture.JPG|600px|Image: 600 pixels]]
 |}

BalanceBoard Lab - Revision history

E.vandenberge: Redirected page to Balance Board

E.vandenberge: Replaced content with "==See Also== *Balance Board"

E.vandenberge: /* Python software */

P.dewater at 14:13, 26 March 2015

P.dewater at 14:13, 26 March 2015

P.dewater at 10:03, 25 March 2015

P.dewater at 09:04, 25 March 2015

P.dewater at 08:59, 25 March 2015

P.dewater at 08:57, 25 March 2015

P.dewater at 08:57, 25 March 2015