Nxt infrared sensor output

Hello,
I am working on a project that involves the lego nxt mindstorm. In my labview block diagram, I have the nxt infrared sensor connected to a waveform output. That is, a waveform is displayed according to the movement of the robot and the infrared sensor.
I am writing to find out if it is possible to make the output numbers instead of a waveform. Basically, I don't want it to draw a graph, I want to read the output as numbers. Better yet, it could also draw the graph but I also want to be able to get the numbers.
What function do i use?
Any suggestion is definitely appreciated.
Thank you.

Hi olams,
You should be able to right-click on the output terminal and select Create»Indicator. It sounds like this waveform graph is not the standard output for that VI, so creating an indicator should make a numeric output. Thanks.
Stephen Meserve
National Instruments

Similar Messages

VFD noise on other sensor output such as : Thermocouples, Accelerometer, Torque meter

Hi,
I'm using a PCIe-6351 Daq board (and SCB-68) for my test rig. I'm collecting different kinds of sensor outputs through this DAQ board such as temperatures, acceleration, and torque meter output.
beside that, I have connected a VFD (Baldor H2 inventor) using a USB cable to the PC case. I use this VFD to control motor speed. (http://www.baldor.com/products/accontrols/vs_inverter.asp)
Here is my problem:
when I turn on the VFD I get a lot of noise on every signal. This noise is like a peak which repeats every 5-6 seconds.
So it's not 50-60 HZ noise of outlets.
You can see related uploaded video clips on :
http://www.megaupload.com/?d=4NHDIVV7
http://www.megaupload.com/?d=2461Z7KN
I have uploaded some pictures too.
Is there any way that I can filter this noise in Labview? ( I have tried Filtration VI in labview, but couldn't find a correct setting)
How can I get rid of this noise?
I really appriciate your help on this matter.
Thanks.
-Jeff
Attachments:
Pics.zip ‏585 KB

I can very much identify with this issue. I have a test bench with two motors and corresponding Baldor H2 VFD's on it. I have a variety of sensors such as accelerometers, hall effect sensors, and a torque meter. The bench was put together "professionally" but still get this kind of noise.
The *only* sensor that I have this trouble with is the torquemeter. I get an impulsive EMI blast every 12 seconds on this signal with just one drive turned on. With the other drive turned on, the noise is excessive. I have spent weeks troubleshooting assumed ground-loop faults with the torque meter company's tech rep - to no avail.
I have confirmed that this EMI is from the drive. I hooked up a wire to the signal lead of an oscilloscope's VFD (acting as an antenna) and the noise I get on this oscilloscope is very similar to what I get on my torquemeter. (The noise is present only when the drive is powered up)
The noise from the VFD will not be cured by using a low pass filter. Impulsive type events have very broad band noise.
My new approach is to try and use adaptive noise cancellation to get rid of the the VFDs' EMI on the torquemeter. I gather the noise signal on my DAQ card (PCI-7851-R) by plugging just one wire into the positive port of an AI port and tying a 1 mega Ohm resistor from that port's ground to the AI port; this provides a means of collecting the EMI from the drive with an "antenna." The wire dangles by the side of the VFD with the other end taped up. See the following for a description of adaptive noise cancellation with labview (also possible on an NI FPGA device):
http://zone.ni.com/reference/en-XX/help/372357A-01/lvaftconcepts/aft_noise_cancel/
I believe this to be the only sound signal processing means of addressing this issue. I am still struggling to get it to work myself. I'll advice as I progress.
Cheers
Jordan McBain, PhD
LabVIEW Controls Engineer
Revolutionary Engineering

Early 2008 mac pro has an infrared sensor?

early 2008 mac pro has an infrared sensor?

okay-what, am I a salesperson now? dunno why you can't google it yourself, or get me a job doing this (just kidding--sorta)
anyways, you could try either twistedmelon or a bluetooth presentation remote (targus or Kensington,maybe logitech.
I think i've done enough here....just fyi, bluetooth on a mac pro desktop isn't great....
getting a dongle for that might be helpful.....
John B

Is it possible to multiplexe 8 analog sensors output into one PXI4472 channel?? can PXI4472 recognize those signals??

I have around 64 analog sensors to connect to PXI4472. Instead of buying 8 PXI4472, is it possible to multiplexe 8 analog sensors output into one PXI4472 channel?? can PXI4472 recognize those signals??

Such a set up is not recommended. Some of the drawbacks are:
Depending on how you plan to multiplex the signals together (SCXI/PXI switch, 3rd party mux), you could very easily be introducing noise to your system.
Multiplexing the signals together into one line limits your sampling rate to the switching speed of you multiplexer device.
You will probably need to spend more time developing handshaking schemes in order for switching and acquisition to occur in such a way that you don't miss signals that you want to acquire.
These are only some of the drawbacks to this setup. All in all, the only functionality of the 4472 board that you would be left with is it's ability to sample all eight channels at the same time. So, you could multi
plex all the signals together, but doing so is not recommended.
However, I have a couple of questions. Do you want to sample all 64 sensors at the same time? Assuming that you are not, how are you planning on multiplexing the signals together? What kind of a chassis are you working with? Please let me know.
Logan S.

NXT ultrasonic sensor problem

I guess there is some hardware problem with my NXT ultrasonic sensor , there is a try me option and when I try it to use ultrasonic sensor it makes sounds when something gets close to it ( now it only makes sound when I put something extremely close to it ), other than this it has an option to measure distance in cm , but it can measure no more than 7 cm wheras the booklet that came with it says that it can measure lenghts upto 255cm .
Anyone had this problem before ?? or can you help me out ?
Thanks in advance

Hello dumba16,
What software are you using to test the device? What firmware are you using? Are you using an example program? If the program is an issue you could post the code so that we can verify its functionality. Have you been able to get any other sensors to work successfully? If the device is malfunctioning you may want to contact the vendor that you purchased the device from.
Wear
National Instruments
Product Support Engineer

Lm_sensors: sensors output

Hi,
When I type "sensors", I get:
acpitz-virtual-0
Adapter: Virtual device
temp1: +51.0°C (crit = +105.0°C)
and nothing else. I can't seem to get the chipset info.
"sensors-detect" detected:
Now follows a summary of the probes I have just done.
Just press ENTER to continue:
Driver `it87':
* ISA bus, address 0x290
Chip `ITE IT8705F Super IO Sensors' (confidence: 9)
Do you want to generate /etc/conf.d/lm_sensors? (YES/no):
You should now start the lm_sensors service to load the required
kernel modules.
Unloading i2c-dev... OK
Unloading cpuid... OK
Why doesn't "sensors" print it87-related info?
I don't know if it is related, but sometimes the temperature gets very high (I notice it with my fingers) and I have to reboot; then the fan runs at full speed for about 2 min to cool the CPU.
Any help?
Last edited by jmss (2011-08-12 10:33:24)

I made sure i2c_dev, i801, and core were all loaded.
when i run sensors-detect, this is the output
[timms@arch ~]$ sudo sensors-detect
# sensors-detect revision 5984 (2011-07-10 21:22:53 +0200)
# System: Alienware M11x (laptop)
# Board: Alienware 0VWGCV
This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.
Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no): y
Silicon Integrated Systems SIS5595... No
VIA VT82C686 Integrated Sensors... No
VIA VT8231 Integrated Sensors... No
AMD K8 thermal sensors... No
AMD Family 10h thermal sensors... No
AMD Family 11h thermal sensors... No
AMD Family 12h and 14h thermal sensors... No
AMD Family 15h thermal sensors... No
AMD Family 15h power sensors... No
Intel digital thermal sensor... Success!
(driver `coretemp')
Intel AMB FB-DIMM thermal sensor... No
VIA C7 thermal sensor... No
VIA Nano thermal sensor... No
Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no): y
Probing for Super-I/O at 0x2e/0x2f
Trying family `National Semiconductor/ITE'... No
Trying family `SMSC'... No
Trying family `VIA/Winbond/Nuvoton/Fintek'... No
Trying family `ITE'... No
Probing for Super-I/O at 0x4e/0x4f
Trying family `National Semiconductor/ITE'... No
Trying family `SMSC'... No
Trying family `VIA/Winbond/Nuvoton/Fintek'... No
Trying family `ITE'... No
Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no): y
Probing for `National Semiconductor LM78' at 0x290... No
Probing for `National Semiconductor LM79' at 0x290... No
Probing for `Winbond W83781D' at 0x290... No
Probing for `Winbond W83782D' at 0x290... No
Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no): y
Using driver `i2c-i801' for device 0000:00:1f.3: Intel ICH9
Next adapter: SMBus I801 adapter at 18c0 (i2c-0)
Do you want to scan it? (YES/no/selectively): y
Client found at address 0x1d
Probing for `Texas Instruments TMP421'... No
Probing for `ST STTS424'... No
Probing for `ST STTS424E'... No
Probing for `NXP SE97/SE97B'... No
Probing for `NXP SE98'... No
Probing for `Analog Devices ADT7408'... No
Probing for `IDT TS3000/TSE2002'... No
Probing for `Maxim MAX6604'... No
Probing for `Microchip MCP98242'... No
Probing for `Microchip MCP98243'... No
Probing for `Microchip MCP9843'... No
Probing for `ON CAT6095/CAT34TS02'... No
Client found at address 0x50
Probing for `Analog Devices ADM1033'... No
Probing for `Analog Devices ADM1034'... No
Probing for `SPD EEPROM'... Yes
(confidence 8, not a hardware monitoring chip)
Probing for `EDID EEPROM'... No
Client found at address 0x52
Probing for `Analog Devices ADM1033'... No
Probing for `Analog Devices ADM1034'... No
Probing for `SPD EEPROM'... Yes
(confidence 8, not a hardware monitoring chip)
Next adapter: NVIDIA i2c adapter 0 at 1:00.0 (i2c-1)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 1 at 1:00.0 (i2c-2)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 2 at 1:00.0 (i2c-3)
Do you want to scan it? (YES/no/selectively): y
Client found at address 0x50
Probing for `Analog Devices ADM1033'... No
Probing for `Analog Devices ADM1034'... No
Probing for `SPD EEPROM'... No
Probing for `EDID EEPROM'... Yes
(confidence 8, not a hardware monitoring chip)
Next adapter: NVIDIA i2c adapter 5 at 1:00.0 (i2c-4)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 6 at 1:00.0 (i2c-5)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 7 at 1:00.0 (i2c-6)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 8 at 1:00.0 (i2c-7)
Do you want to scan it? (YES/no/selectively): y
Next adapter: NVIDIA i2c adapter 9 at 1:00.0 (i2c-8)
Do you want to scan it? (YES/no/selectively): y
Now follows a summary of the probes I have just done.
Just press ENTER to continue:
Driver `coretemp':
* Chip `Intel digital thermal sensor' (confidence: 9)
Do you want to overwrite /etc/conf.d/lm_sensors? (YES/no): y
You should now start the lm_sensors service to load the required
kernel modules.
and here's my conf.d/lm_sensors
# Generated by sensors-detect on Fri Aug 12 16:23:45 2011
# This file is sourced by /etc/rc.d/sensors and defines the modules to
# be loaded/unloaded.
# The format of this file is a shell script that simply defines variables:
# HWMON_MODULES for hardware monitoring driver modules, and optionally
# BUS_MODULES for any required bus driver module (for example for I2C or SPI).
HWMON_MODULES="coretemp"
# For compatibility reasons, modules are also listed individually as variables
# MODULE_0, MODULE_1, MODULE_2, etc.
# You should use BUS_MODULES and HWMON_MODULES instead if possible.
MODULE_0=coretemp
Anything else that would help?

Sensor output as input to java program

hi , pls tell me how to use output from infrared senors as input to java program..................???????
mail me the code at [email protected]

Hi,
Check the following syntax:
SUBMIT <rep> TO SAP-SPOOL
[<params>|SPOOL PARAMETERS <pripar>]
[ARCHIVE PARAMETERS <arcpar>]
[WITHOUT SPOOL DYNPRO].
Ex:
The following executable program is connected to the logical database F1S:
REPORT SAPMZTS1.
TABLES SPFLI.
GET SPFLI.
NEW-LINE.
WRITE: SPFLI-MANDT, SPFLI-CARRID, SPFLI-CONNID,
SPFLI-CITYFROM, SPFLI-AIRPFROM, SPFLI-CITYTO,
SPFLI-AIRPTO, SPFLI-FLTIME, SPFLI-DEPTIME, SPFLI-ARRTIME,
SPFLI-DISTANCE, SPFLI-DISTID, SPFLI-FLTYPE.
The following program calls SAPMZTS1 and sends the output to the spool system:
REPORT SAPMZTST NO STANDARD PAGE HEADING.
DATA: VAL,
PRIPAR LIKE PRI_PARAMS,
ARCPAR LIKE ARC_PARAMS.
CALL FUNCTION 'GET_PRINT_PARAMETERS'
EXPORTING
LAYOUT = 'X_65_132'
LINE_COUNT = 65
LINE_SIZE = 132
IMPORTING
OUT_PARAMETERS = PRIPAR
OUT_ARCHIVE_PARAMETERS = ARCPAR
VALID = VAL
EXCEPTIONS
ARCHIVE_INFO_NOT_FOUND = 1
INVALID_PRINT_PARAMS = 2
INVALID_ARCHIVE_PARAMS = 3
OTHERS = 4.
IF VAL <> SPACE AND SY-SUBRC = 0.
SUBMIT SAPMZTS1 TO SAP-SPOOL
SPOOL PARAMETERS PRIPAR
ARCHIVE PARAMETERS ARCPAR
WITHOUT SPOOL DYNPRO.
ENDIF.
Regards,
Bhaskar
Edited by: Bhaskar Chikine on Sep 9, 2008 4:33 PM

NI 4351 giving wrong sensor output

Hey guys, thanks in advance for any help recieved.
I have 6 sensors (3 RTD's and 3 thermistors) connected to a NI 4351 and the sensors were giving the right outputs a few months ago, but now all the sensors are giving out very low values. Any help will be greatly appreciated.
Regards,
Alim
Solved!
Go to Solution.

Glad things worked out.
-CC
"If anyone needs me, I'll be in the Angry Dome!"

0-30mv Sensor Output

Hi. I'm new to labview and data acquisition so please excuse the newbie question:
What is the best way to read a 0-30mv output from a load cell or strain gauge? Does NI make DAQs for this voltage range? Can the same DAQ be used as would be for reading a 0-5V signal (is the accruacy of the DAQs enough to get good readings from a 0-30mV device).
Thank you for any help.

Without getting too deep into the electronics, basically, you need a load cell amplifier, or strain gauge amplifer. Google it. With an amplpifer, you can "convert" the 0..30mV to 0..5V or similar.
What DAQ are you using?
Richard

HT201602 Do you have to point the Apple Remote at the infrared sensor whilst using the remote?

As in it works wireless? I use HDMI to the TV to watch films etc. and would rather point at the television than the iMac located behind me to control content. Thinking of buying one, wont bother otherwise.
Unless there's a wireless device that can be plugged into a USB port on the iMac and receive infrared entries wirelessly from an IR receiver located under the television.. Thanks

As in it works wireless? I use HDMI to the TV to watch films etc. and would rather point at the television than the iMac located behind me to control content. Thinking of buying one, wont bother otherwise.
Unless there's a wireless device that can be plugged into a USB port on the iMac and receive infrared entries wirelessly from an IR receiver located under the television.. Thanks

What is the difference between LV general and LV RT if we consider I want to read the output of a temperature sensor online??

Hi everybody,
I am very new in LV and I need to read my temperature sensore outputs online in order to make needed changes to the system each time that the temperature changes. If I use LV genral or LV RT??
Thanks
Solved!
Go to Solution.

Hi elahetal. The LV vs. LV RT decision really depends on what your timing requirements are.
RT isn't necessarily about being as fast as possible, but rather as consistent as possible.
If you have a measurement that must be taken every 100mS +/- 2mS then you pretty much have to use RT. A general purpose OS like Windows will randomly go off and do other things (read a cd, feed the printer, index the disk, etc.), causing your measurement to be late.
An RT environment will allow you to determine precisely when the system should do what. The trade-off is that the RT environment is somewhat restricted, in that you don't have all the bells and whistles of a gp OS.
If your measurement must be taken every 15S +/- 10S then you may very well get away with standard LV on a PC.
In some instances, a combination works well. For example, RT on FieldPoint or CRIO to handle the time sensitive issues and LV on a PC to handle the user interface and data analysis.
Hope that helps, please elaborate on your requirements if you wish.
Matt

NXT custom output

I'm constructing a robot for a school project in which I am needing to use custom NXT inputs and outputs. For my input I am needing the NXT to recognize a voltage sent to it from a metal detector (between 1.5 and 1.9 volts) and then rotate a motor, to specific degrees that correspond to a sorting device I have made. Secondly I need a custom output that will send a voltage to a solednoid to life a plunger to allow a coin to fall through a hole. I am having troubles creating code that will succesfully run, and perform the actions desired....any help will be much appreciated.
Solved!
Go to Solution.

Hi LracNayr,
I'm not familiar with the NXT. What I can offer is going to be more of a top
level approach to trouble shooting. I would recommend that you visit the Lego
FAQ webpage for more specific trouble shooting steps.
If you are having an issue with reading in the input, the first step I would
take is to read the raw voltage output from the metal detector using a DMM.
Your metal detector may not be outputting the correct voltage for each of the
corresponding coins. Once you have verified that the output voltage is correct,
I would go on to test the raw voltage reading with the NXT hardware. With NI
products, you can accomplish this using Measurement and Automation (MAX). I do
not know if this is possible with NXT, however, the general principle will be
the same. You want to verify the output voltage from the hardware first before trouble
shooting the software. When that's done, it's unlikely that you will see an
error assuming that you are using the appropriate functions.
I hope this helps. As stated before, NI does not support this particular
product. I strongly recommend that you visit the link I send you with a
previous post.
Regards,
Josh L.
Applications Engineer
National Instruments

MULTIPLE INPUT ERROR (2 INPUT 1 OUTPUT ERROR)

I was doing my project using two different inputs(sound and Infrared sensor) with one output. However I encounter an error. I hope someone can help me out with my problems.
Error screenshot:
[spoiler][img]http://img337.imageshack.us/img337/1066/errorhe5.png[/img][/spoiler]
Attachments:
ERROR.JPG ‏85 KB
ERROR1.vi ‏186 KB

Since i don't have your hardware, it is not worthy to create an example where you hope for a direct funtionality.
It is much better if you understand the work the assistant is doing for you.
The DAQ assistant supplies the user with an interface to many (not all) functions usable with DAQmx devices. You can configure your task there; the task consists of at least one physical channel (you can say the inputpin) and the settings for the amplifier and multiplexer (if the device has a multiplexer) for each channel (which is called global virtual channel then).
Next step is to define timing and trigger settings which are effective for the whole task (so all virtual channels!).
I still suspect that you have two analog inputs connected to the sources and the device is multiplexing. So you have to configure one task containing both physical channels and their appropriate settings. Both channels will be sampled with the same timing settings then. The DAQ assistent already splits up the signals into two different waveforms which are encapsulated in the dynamic datatype. Just retrieve the signals properly.
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

How to create a type of 'alarm event' based on acquired sensor data and system time?

Hello all,
I'm fairly new to LabVIEW and have successfully created a VI that reads voltage data from sensors. Each sensor outputs 2 voltage values and I treat these values as 2 different DBL values. I'd like to be able to record each voltage value as a base and then compare the subsequent data readings with that base. Once the base is determined, I'd like a sort of 'variable' set as "TIME" to be recorded at the moment the base voltage is recorded.
The alarm should occur (or anything Boolean set to TRUE I guess) once the continuously read voltage remains within certain limits for about 2 hours. I know I can compare the system time w/ the "TIME" that the voltage base value was recorded. If the voltage readings escape those limits, I'd like the voltage base value reset and the TIME set to the corresponding system time again.
I apologize in advance if this I haven't' described my problem well, but if anyone could help me figure out the best way to create this code, I would appreciate it much!
Thanks!
Solved!
Go to Solution.

ill try to illustrate a couple scenarios:
keep in mind that i dont necessarily want the voltages in these specific ranges, but just a range of +/- 20 mV ... in an above post i refer to a "base" voltage reading, in this case that would be 200 mV for V1 and 400 mV for V2, just because the voltage has shifted to those values for an extended amount of time each (> 2 seconds)
Scenario 1
1:00 pm
Sensor readings
Voltage 1: 200 mV
Voltage 2: 400 mV
between 1:00 and 3:00 pm:
Voltage 1 does not deviate from 180-220 mV range
Voltage 2 does not deviate from 380-420 mV range
at 3:00pm I want an alert/alarm/Boolean to change to 'true'
Scenario 2
1:00 pm
Sensor readings
Voltage 1: 200 mV
Voltage 2: 400 mV
at 1:45 pm:
Voltage 1: 2 mV
Voltage 2: 600 mV
Since the voltage has shifted out of the range, i want the new base voltage to equal whatever it changed to out of the range, and also the time spent within the new range (2 +/- 20 mV and 600 +/- 20 mV, respectively for V1 and V2) would be reset, so a new 2-hour counter would begin

How do I use elvis to record data from a pasco rotary motion sensor

I want to use a pasco rotary motion sensor (a rotary encoder) with ELVIS to record angular velocity. I have a LabPro system which I could also interface. But I was hoping to keep the hardware less complicated by wiring the sensor directly to ELVIS. Does anyone have a sample .vi which would record sensor output?

Hi PCM,
Measuring the time between pulses can be a little complicated. You can have a look at this knowledge base to get an idea of how it can be accomplished. However, since the sensor's output is a stream of digital pulses you can use the counters in this card to get some information from the digital signal. You can use one of the counter’s inputs in the NI-ELVIS and get the frequency or period of the digital signal. One good point to get started is by looking at the counters examples built in LabVIEW, you can find them going to Help > Find Examples > Hardware Input and Output > DAQmx > Counter Measurements. I hope this is helpful.
Ana P
National Instruments
Applications Engineer

Nxt infrared sensor output

Similar Messages

Maybe you are looking for