How to record 1 sample per minute

Similar Questions

• How to get the timestamp per minute for the given interval

  Hello

  I have a table with a date of beginning and end of time columns. I need to divide the date given in one minute interval and post the results.

  create table min_data(objectid varchar2(20),starttime timestamp,endtime timestamp,duration number);
  
  
  SET DEFINE OFF;
  Insert into MIN_DATA Values ('U1_B011_P006_InvA', TO_DATE('06/23/2015 02:42:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('06/23/2015 02:46:00', 'MM/DD/YYYY HH24:MI:SS'), 5);
  Insert into MIN_DATA Values ('U1_B011_P006_InvA', TO_DATE('06/23/2015 12:43:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('06/23/2015 12:44:00', 'MM/DD/YYYY HH24:MI:SS'), 2);
  COMMIT;
  
  
  
  
  

  My expected output should be something like this. INT_TIMESTAMP is the timestamp calculated for the given interval (time of start and end times)

  INT_TIMESTAMP	OBJECTID	STARTTIME	END TIME
  23/06/2015-02:42	U1_B011_P006_InvA	23/06/2015-02:42	23/06/2015-02:46
  23/06/2015-02:43	U1_B011_P006_InvA	23/06/2015-02:42	23/06/2015-02:46
  23/06/2015-02:44	U1_B011_P006_InvA	23/06/2015-02:42	23/06/2015-02:46
  23/06/2015-02:45	U1_B011_P006_InvA	23/06/2015-02:42	23/06/2015-02:46
  23/06/2015-02:46	U1_B011_P006_InvA	23/06/2015-02:42	23/06/2015-02:46
  23/06/2015 12:43	U1_B011_P006_InvA	23/06/2015 12:43	23/06/2015 12:44
  23/06/2015 12:44	U1_B011_P006_InvA	23/06/2015 12:43	23/06/2015 12:44

  I wrote a query that works for one set of intervals.

  With get_data AS(
  SELECT   a.*,
           starttime -1/1440 v_s_date,
           endtime v_e_date
  FROM min_data a
  where duration=5)
  SELECT v_s_date + ((1 / 1440) * DECODE(LEVEL, 1, 1, LEVEL)) int_timestamp, objectid,starttime,endtime
            FROM get_data d
           WHERE MOD(LEVEL, 1) = 0
              OR LEVEL = 1
          CONNECT BY LEVEL <= (v_e_date - v_s_date) * 1440;
  
  

  Please send me a SQL query that gives me the timestamps of minutes between intervals.

  Hello

  The following query works for any number of intervals

  SELECT STARTTIME + ((LVL-1) / 1440) INT_TIMESTAMP, OBJECTID, STARTTIME, ENDTIME

  Of

  (SELECT LEVEL LVL FROM DUAL CONNECT BY LEVEL< 10)="">

  (SELECT * FROM MIN_DATA)

  WHERE STARTTIME + ((LVL-1) / 1440) BETWEEN STARTTIME AND ENDTIME ORDER BY, STARTTIME, ENDTIME LVL;

  Concerning

  Salim

• How to abort Continuous Acquisition (which is set to acquire a constant number of samples per channel each iteration)?

  Hi all

  I would like to continuously acquire an input channel analog and, if necessary, be able to stop the acquisition as quickly as possible.

  I use a card NI USB-6289. I implemented a DAQmx (voltage) analog input task, set the clock sampling DAQmx 'continuous samples' and the rate required (IE 1000, which is 1 kHz). For the acquisition, I used a while loop with inside the DAQmx Read with Terminal 'number of samples per channel', wired (IE 1000). The while loop waits until 1000 samples are acquired and therefore continuously reads the channel in uniform batches of 1000 samples every second ticking. The while loop can be easily interrupted when the DAQmx has completed the acquisition of the lot being 1000 samples, but it takes the DAQmx finish their current task.

  My problem is how to stop the loop while the DAQmx Read lies in the middle to get 1000 samples WITHOUT delay all 1000 samples are received? Is it possible to interrupt the DAQmx Read?

  I could reduce "the number of samples per second", increasing the responsiveness of the while loop, but this is not the solution I prefer. I tried to destroy the task (outside the while loop), but that does not stop immediately the acquisition, Read DAQmx still finish acquire 1000 samples. I've included an example Subvi. When I was using a PCI card, I used a timed while loop with inside the DAQmx Read with Terminal 'number of samples per channel' wired-1 (= which means ' read everything in the buffer "). In this case, it was easy to stop the acquisition at any time: the timed, while the loop is abandoned and the acquisition has ceased immediately. But it does not work with an NI USB-6289 map (see thread http://forums.ni.com/ni/board/message?board.id=170&message.id=386509&query.id=438879#M386509) because of the different way the data are transferred to the PC.

  Thank you very much for your help!

  Have a great day,

  LucaQ

  Hi LucaQ,

  Your solutions are decrease of the number of samples, or record the time you want to stop and remove samples that have been acquired beyond this time. There is no other way to stop the actual reading out of the hardware store.

  Flash

• How can I throw 100 samples per second on a graph?

  Hello

  I take a CANBus 100 samples per second, and I would like to present these data in a real-time graph. I want to see all 100 samples and the graph refresh every 1 dry, I use a waveform table.

  I would like to than my table updated with new data every one second (1 SEC 100 samples, 200 samples of 2 sec, etc.) and be able to see all 100 samples we take in real-time in the chart. My question is it possible? I think that some how I need to change the x in the graph scale? I did a little code in which I change the x of the chart scale and put in real time, but in the graph shows only a sample of 100 samples that I take every second, can you please suggest a solution for this?

  
  

• Is there a beats per minute category on the track of the lists in the music library.  This wish for my market and playlists running if I don't have to listen to each of them before transferring them to the playlust

  I have the playlists of the exercise.  Want a beats per minute category in the music library to transfer to the race and the playlists easier market.  Instead of having to listen to all the tracks.  I know how many beats per minute is a good walking or running pace.

  iTunes has a tag BPM but does not have a way to fill automatically - there are some add-ons from third-party that will provide this feature.  See this threadfor some examples.

• samples per channel and the number of samples per channel

  in my DAQ mode samples finished program, there are two screws: timing and read.vi DAQmx DAQmx.

  I have to set the parameter to "samples per channel" DAQmx timing.vi and 'number of samples per channel' on DAQmx read.vi... Is there a relationship between these two?

  My laser runs at 1 K Hz. I want to go to the wavelength, wait for a number of shooting lasers, read the data and move on to the next page...

  Thank you

  Lei

  In your case, the VI will acquire the lesser of either:

  The "samples per channel" that you have defined on the timing DAQmx VI

  -OR-

  The number of iterations of your for loop (N) times the 'number of samples per channel"that you have defined on the DAQmx read VI

  The "samples per Channel" VI DAQmx of timing for a finite acquisition dictates how many samples the DAQ hardware should acquire in it's onboard buffer before indicating that the acquisition is complete.  "The number of samples per Channel" on the read DAQmx VI dictates how many samples the DAQmx driver must return buffer on board the aircraft to your application.

  Let's say the "samples per channel" on the calendar DAQmx VI is set to 50.  Thus, the card will acquire 50 samples and place them in the edge of the buffer, then stops.  Suppose we have the 'number of samples per Channel"on the DAQmx reading VI the value 3 and what we call the VI in a loop For which runs 10 times.  Thus, every time the DAQmx lu VI is called, it will wait until there are at least 3 samples in the buffer, and then return these three.  We call the VI a total of 10 times, then we will answer 30 total samples.  Thus, the last 20 samples acquired the card remains in the buffer and are destroyed when the task is disabled.

  Now let's say that we increase the "number of samples per Channel" on our DAQmx Read VI at 10.  VI Read will wait until 10 or more samples are in the buffer, and then return these 10. Thus, we will be back all 50 samples map acquired by the 5th iteration of the loop For.  The 6th time we call him VI DAQmx Read it expires, because there will never be another 10 samples in the buffer, and the VI returns a warning.

  This clarifies things?

  The purpose of this behavior is to allow you to both set the total number of samples that the DAQ hardware will acquire and also control how much of these samples is returned whenever you call the DAQmx Read VI.

  Kind regards

• Average per minute and Reset counter

  Hello

  First of all this is the first time I programmed in labview. I have a device that allows to measure radioactivity (in the disintegrations per minute) and this device makes a sound every time it receives a signal from radioactivity, in labview, I did an application that uses the microphone of my laptop to detect this (high volume sounds) and counting the sounds, but my problem is that I need the counter to record values after each minute and only give me an average of these values) first minute 5 signals so in the Midland to be number 5 for example, the next minute I get 7 signals so the medium box will show me 6). Can someone help me please?

  Hi Laurro,

  -Use ElapsedTime to determine your minutes intervals.

  -average: = (average_previous + new_value) /(i+1) with "i" being the loop iterator. You need a registry change to store the value for average_previous

  Both are fundamental concepts of LabVIEW and you can learn with all these free beginner resources offered by OR on their website (Start here)!

• sample per channel and read sample

  Hello everyone

  I'm new in LABVIEW and I have some difficulties with something.

  I put t know exactly what is the difference between the sample by channel and the sample to read. According to me, knowing that the sample by channel is the size of the buffer that is larger than the sampling frequency, but I put t know what is the sample to read.

  I ve tested with different sample per channel and read. Sometimes I get an error and sometimes know and I would like to know why. If you have examples because I understand better, it will be great.

  I really need to understand this part of my project

  Thanks for your help

  Tony GIBERT

  Hi Roro,

  As you mentioned, when the size of the buffer absorbing continuous samples, you can specify the sample by placing a value to the entry "samples per channel" on schedule vi. The entry of 'number of samples per channel' on reading vi which automatically names a control / constant with 'samples to read' specifies the number of samples you want to remove from the buffer in an appointment during playback of several samples (N). This link may provide a little more detail. I am also attaching a good example of the finder OR example that you may find useful to explore. I assume you are using the DAQmx driver put then please let me know if this isn't the case, but the same principles should apply in any event.

  This means accordingly for sampling at a given rate, you must make sure you're pulling data in large enough 'chunks' so that the buffer overflows (which may well be the cause of error that you see). On the other hand if your sampling rate is slow and your reading vi is having to wait the number of samples to read you have specified to be available, he can lift a time-out error. You can avoid this by increase your sampling rate, reduce your samples to play or increase the time-out specified read vi entry (-1 means it will wait indefinitely).

  Let me know if this helps and how you will.

  All the best.

• How to control the sampling time during data acquisition

  I managed to manually collect 16 channels of analog signals (writing custom file VI) using a command Boolean start/stop.  I would like to allow the user to set a term of the sample on the front panel (for example, 20 seconds) and initiate sampling by clicking a start button.  The user can also put an end to the reception of the data before the end of the set time by clicking a stop button.  I looked at several examples of countdown timer, but could not figure out how to integrate it with my VI.  All suggestions and examples will be very appreciated.

  You are far too complicated. On the one hand, there is the function elapsed time on your palette. Secondly, as already mentioned, there is a relationship of basic arithmatic between samples per second and the number of samples to be read. Use you will get samples more than this as requested anyway. Finally, your code shows two analog read tasks. You can do that, unless there are two separate devices.

• How to set the sampling interval using DAQ hardware?

  Now I have a sensor capability and hardware DAQ 24 bit (http://www.mccdaq.com/usb-data-acquisition/USB-2404-10.aspx).

  The DAQ hardware has the 50kS/s maximum sampling rate. My question is how to define the range of data collection. For example, if I set the sampling rate of 2000, continuous sample mode, I use read.vi DAQmx in a while loop and set the "number of samples per channel" to 100. I want to plot these data over time using a XY Chart and also save this data. So I add a 'Medium' function to get the average of 100 samples per each loop (medium, there are 20 release of data per second). But when I put a 'number of samples per channel' much more small (for more data per second), there are a few problems. It seems that the program cannot read the data as much and get the average at a higher frequency. I don't know where is the problem. Overall, the collection of data more frequently? Maybe I didn't articulate my question. I'll upload a simple program later if necessary. Thank you.

  
  

• 10 samples per second 9229

  Looking to capture the 10 samples per second in a file by using a NI9229.

  I think I have the output to work correctly using a backup in format ascii/lvm.

  My problem is that I can't know the ratio to capture who gives me 10 samples (10 rows of data) per second using a 'samples of N' 'samples to read' and 'rate (Hz).

  My goal is to have 10 samples per second and the first column correctly lable time since when I click 'run' until I hit the stop and tell me how many seconds it failed because I stopped before her.

  Thank you

  Matt

  Hi Matt,

  I didn't know that you use SignalExpress.

  This is what you want?

  • DAQmx acquire:
  • • Acquisition mode = continuous samples
    • Samples to read = 200 (or 2000, if you want to see 1 second at a time on the graph)
    • Rate (Hz) = 2 k
  • Subset and resampling:
  • • Subset of return = false
    • Resample = true
    • DT = 100 m

  Brad

• Total number of samples per channel

  Hello

  I was wondering if you can call a function that returns the total number of samples per channel read. I try to get a precise timestamp.

  I use DAQmx ANSI C developer environment.

  According to NOR:

  Option #1:

  Try and do exactly what the driver is doing.  This will require you to do exactly what you do in the displayed example.  Call time current system immediately before calling the DAQmx Read and subtract dt * x where x is the number of samples already acquired.  It will take you to know exactly how many samples were acquired.  It can be found by calling the Total property of the samples by chain acquired immediately before the DAQmx Read.  This is to introduce some points for innaccuracy.  For example, you're time system is already innaccurate to a certain amount.  In addition, it takes some time between the system times call, calling the total number of samples acquired and calling the DAQmx reading.  If 2 samples are acquired between the call to the time system and the total number of samples acquired, you could be shifted a few samples.  For the slower clock rates, you will have more precision.

  I try to attempet to program this solution, but cannot find the total number of samples per channel acquired property. If anyone can help me, your help will be very appreciated.

  Thank you for your help,

  Vladimir

  Hi Vladimir,.

  Here is the property you are looking for (as the C reference help):

  

  You will be able to get accurate relative timestamps, since we know that our acquisition is based on a sample with a certain dt clock.  The value of initial time must still come from the OS.

  Best regards

  John

• PowerShot SX510 HS automatically stops video recording after 10-15 minutes in the record.

  PowerShot SX510 HS automatically stops video recording after 10-15 minutes on continuous recording. Is there a way to disable this option? I would like to record videos up until I press the button stop recording or the battery is low. I've disabled all the setting of energy saving, at least, I think I have.

  The camera has some limitations for registration, as do all models of Canon. Here's how you can extend your durations for registration to a maximum of about 1 hour, but there is a limit of 4BG regardless so once he hits 4 GB recording stops and has to be restarted.

  Also, the memory card has to be at least a class 6 rating or recording will stop as soon as possible regardless of the size of the clamp.

  It comes to page 161 of your manual

  

• Sound recorder will not record more than a minute

  on xp sound recorder won't record more then 1 minute, how can I increse duration of registration?

  on xp sound recorder won't record more then 1 minute, how can I increse duration of registration?

  You can not.

  I recommend you use Audacity, a freeware sound editor who can do the job as long as you want. In addition, you can change the sound files after. Google for it. Also download the Lame encoder if you want to work with mp3 files.

  See you soon,.

  Jerry

• DSC-WX150 will stop recording at 03:00 minutes when you use the HDMI video output

  Hello

  I have a Sony Cybershot DSC-WX150 camera.

  When using an output HDMI cable to view the camera to a television screen, the video movie recording function to 3:00minutes exactly every time automatically stops.

  When there is no HDMI cable plugged into the camera, it records fine 20 minutes.

  I tried changing film formats, changing the power settings, camera reset the values by default, etc., but with no difference.

  Why it only record at 03:00 minute exactly mark when you use the HDMI video output? Someone knows how to fix this?

  Thank you

  Hi tight,

  Welcome to the community of Sony!

  If I understand correctly, when you use your TV as a monitor while video recording automatically stops and does not cross the entire 29 minutes. Based on your manual, it is normal for the camera when it is connected to another device via the HDMI cable. This serves as protection for the camera.

  If my post answered your question, please mark it as "accept as a Solution. Thanks_Mitch