APK Download Apps Tools vibration analysis 1.0

vibration analysis 1.0 APK

1.0 / November 19, 2017
Kröber
Tools
(4.3/5) (96)

Description

Acceleration measurement and determination of therelevantfrequency, the acceleration and the amplitude of theoscillationExplanation of the buttons arranged on top of the screenCONTI:Continuous measurement 5 SEC: Fixed measurement duration of 5sec,then STOP automatically STOP: Stop of measurement, the last5seconds are displayed -: In stop mode, move zoom window(1.28sec)to the left, only for PRO version +: In stop mode, movezoom window(1.28sec) to the right, only for PRO version There aresevenfigures below the buttons. Upper figure "Currentaccelerationvalues": The accelerations values are displayed. Thesamplingfrequency of most smartphones is 50 Hz. If the actualsamplingfrequency deviates by ± 1 Hz, then the actual samplingfrequencyappears (flashing). Different times must then becorrectedaccordingly. The numerically displayed measured valuesarecorrected automatically. During a swipe action "from bottom lefttotop right", the APP goes into a diagnostic mode. Then theactualsampling frequency, the standard deviation of thesamplingfrequency and an internal counter appear. Underneathfigure"Accelerations over time": It shows the accelerations curveof thelast 5 seconds. After pressing STOP, a window of 1.28 sec ismarked(vertical black bars). in PRO version: the window can bemoved by±, after a double-tap on the figure it appears twice aslarge,after another double-tip it is resized again. Swipe up, swipedownto change the scaling. Underneath figure "Largest of thethreeacceleration components curve": It shows the accelerationcomponentwith the maximum acceleration change. The zoom windowisrepresented by 1.28 sec. It is particularly suitableforoscillation frequencies from 1 Hz to 15 Hz. The more sinusoidalthetime signal, the more secure are the determined values.Indiagnostic mode, trigger points and sine approximationsarevisible. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the scaling.Underneathfigure "Numerical evaluation from the time signal":Hereevaluations from the time domain are displayed numerically. Inthediagnostic mode, the number of detected vibrations aredisplayed.Sx is their standard deviation. The larger n and smallerSx, thesafer the values determined. The acceleration amplitudealsospecifies a standard deviation. The calculation is done withtheleast square method. Underneath figure "FFT-writing oftheacceleration over time": Here, a plot of the accelerationspectrumover time is shown. Shown are the last 5 seconds. The zoomwindowis marked. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the intensityscale.Underneath figure "FFT spectrum of the zoom window": It showstheFFT spectrum within the zoom window. The black curve istheresulting acceleration. In PRO version: after a double tip onthefigure it appears twice as large, after another double-tip itisresized again. Swipe up, swipe down to change thescaling.Underneath figure "FFT, numeric": It is the numeric outputof theFFT spectrum within the zoom window. The maximum of the FFTisindicated by a cross. Frequency, Amplitude and maximumaccelerationvalues are shown.

App Information vibration analysis

  • App Name
    vibration analysis
  • Package Name
    com.kroeber.vibration_analysis
  • Updated
    November 19, 2017
  • File Size
    1.3M
  • Requires Android
    Android 4.1 and up
  • Version
    1.0
  • Developer
    Kröber
  • Installs
    10,000+
  • Price
    Free
  • Category
    Tools
  • Developer
    Deutschland
  • Google Play Link

Kröber Show More...

reverberation time pro 1.1 icon
reverberation time pro 1.1 APK
Kröber
Special feature of the Pro version:After successful statistical analysis, the graphical bar display isgreen, on failed evaluation it is shown red. To differentiategraded color combinations are used. The numerically displayedaverage includes the frequencies from 250 Hz to 5000 Hz. In theaverage only the results with green bars are considered. These areconsidered sufficiently statistically safe. With the button - andthe button + decay curves of all frequencies can bedisplayed.The numerical value of the reverberation time, standing on the farright, is denoted by Z (Z for Zero). Here no frequency analysis orfrequency weighting takes place. This value is displayed in thestandard version of the APP.General:With this app, the reverberation time of a room can bemeasured.The reverberation time is an acoustic parameter for thereverberation of a room. It is described by the drop in soundpressure level which is measured after a short loud noise (pop abag or clap your hands once). The time it takes for the sound todecay by 60 dB, is called the reverberation time.When assignment "= 80 dB loud" and "20 dB = quiet" you can also saythis: The reverberation time is the time that elapses until you nolonger observe a previously loud noise.In a classroom at school or a in a kindergarten, the reverberationtime should be about 0.6 seconds. The desirable value is slightlydependent on the volume of the room: 180 m³ = 0.55 s / 360 m³ =0.65 s.The value of 0.6 seconds is considered for a full room withstudents or children. Due to the absorption of the bodies, thereverberation time of an empty room is higher. For an empty roomthe reverberation time should be 0.75 seconds, instead of the 0.6seconds for a full room.For hearing-impaired children or adults with tinnitus the nominalreverberation time can be reduced by 20%.For comparison: In a room, which is used for music, thereverberation time should be 1.1 seconds, in churches, the value is2 seconds or higher.The reverberation time is too long:In a live room every word sounds louder. Furthermore, a previouslyspoken word is still audible when the following words are spoken.They talk across each other. To improve the speech intelligibilitythe speaker speaks louder. Thus, it becomes even louder in theroom.The reverberation time is too short:Children, standing directly in front of the speaker, understand thespoken words well. Due to high sound absorption in the room, on theside and particularly in the rear area of the speaker, the wordsare bad to hear. The children do not feel addressed. This can becompensated by speaking louder, but this leads to hoarseness of thespeaker.Measurement of the reverberation time:Before and during the measurement, it must be quiet in the room.The measurement is triggered by a loud clap or popping of a paperbag. The determined value of the reverberation time is displayedimmediately. For evaluating the average of 3-5 measurements shouldbe used.
acoustic frequencies 1.1 icon
acoustic frequencies 1.1 APK
Kröber
The APP captures the acoustic pressure by the internal microphonein function of time. The sampling frequency is always 8000 Hz.Buttons arranged on the top: Low: Low frequency resolution, forfast response frequency resolution approx. 15.6 Hz Med: Mediumfrequency resolution (only available in PRO-version) frequencyresolution approx. 3.9 Hz High: High frequency resolution (onlyavailable in PRO-version) frequency resolution approx. 1.0 Hz"Ultra high Frequency Resolution" --> see below Stop: Stops themeasurement Exit: Terminates the APP Description of the graphics(from top to bottom): 1st graphic with sound level trend: Soundlevel trend of the last 12 seconds, scaling from 0 dB to 90 dB. Bywiping across the 1st graphic (wiping always from bottom left totop right over the relevant graphic) the numerical current value isdisplayed. 2nd graphic with sound pressure in function of time 3rdgraphic for tone identification: If a clear tone within thefrequency spectrum can be determined, the tone will be displayedwith a red bar. 4th graphic with numerical peak-frequency andfrequency spectrum: The numerical frequencies of the three highestpeaks will be displayed. For better reading you can stop themeasurement with the "Stop"-button. 5th graphic third octave bandanalysis: For acoustic assessments the third octave spectrum isused. The relevant frequency range from 100 Hz (limited due to thefrequency response of the internal microphone) to 3150 Hz (limiteddue to the sampling frequency) is displayed. Only available inPRO-version: The frequency response of the internal microphone wascalibrated in a diffuse sound field to a reference device. Thiscalibration has been performed on a Samsung Galaxy S2. Thedisplayed third octave dB-values include this correction and theA-weighting. Other implemented wiping gestures: Ultra highfrequency resolution (only available in PRO-version): By wipingacross the 4th graphic (wiping always from bottom left to top rightover the relevant graphic) an ultra-high frequency resolution willbe activated, frequency resolution approx. 0.5 Hz. Higherintegration time (only available in PRO-version): By wiping acrossthe 5th graphic (wiping always from bottom left to top right overthe relevant graphic) the averaging time of the displayed thirdoctave values is increased by a factor of 5. Show internaldiagnostic data: By wiping across the complete display (wipingalways from bottom left to top right) internal data is displayed inthe lower part of the display. For more details:http://www.hs-koblenz.de/profile/kroeber/ Keywords: acoustic,frequency, tone detection, frequency analysis, third octaveanalysis, dBA, FFT
pro acoustic frequencies 1.1 icon
pro acoustic frequencies 1.1 APK
Kröber
PRO-VERSION:The APP captures the acoustic pressure by the internal microphonein function of time. The sampling frequency is always 8000Hz.Buttons arranged on the top:Low: Low frequency resolution, for fast responsefrequency resolution approx. 15.6 HzMed: Medium frequency resolution (only available inPRO-version)frequency resolution approx. 3.9 HzHigh: High frequency resolution (only available inPRO-version)frequency resolution approx. 1.0 Hz"Ultra high Frequency Resolution" --> see belowStop: Stops the measurementExit: Terminates the APPDescription of the graphics (from top to bottom):1st graphic with sound level trend:Sound level trend of the last 12 seconds, scaling from 0 dB to 90dB.By wiping across the 1st graphic (wiping always from bottom left totop right over the relevant graphic) the numerical current value isdisplayed.2nd graphic with sound pressure in function of time3rd graphic for tone identification:If a clear tone within the frequency spectrum can be determined,the tone will be displayed with a red bar.4th graphic with numerical peak-frequency and frequencyspectrum:The numerical frequencies of the three highest peaks will bedisplayed. For better reading you can stop the measurement with the"Stop"-button.5th graphic third octave band analysis:For acoustic assessments the third octave spectrum is used. Therelevant frequency range from 100 Hz (limited due to the frequencyresponse of the internal microphone) to 3150 Hz (limited due to thesampling frequency) is displayed.Only available in PRO-version:The frequency response of the internal microphone was calibrated ina diffuse sound field to a reference device. This calibration hasbeen performed on a Samsung Galaxy S2. The displayed third octavedB-values include this correction and the A-weighting.Other implemented wiping gestures:Ultra high frequency resolution (only available inPRO-version):By wiping across the 4th graphic (wiping always from bottom left totop right over the relevant graphic) an ultra-high frequencyresolution will be activated, frequency resolution approx. 0.5Hz.Higher integration time (only available inPRO-version):By wiping across the 5th graphic (wiping always from bottom left totop right over the relevant graphic) the averaging time of thedisplayed third octave values is increased by a factor of 5.Show internal diagnostic data:By wiping across the complete display (wiping always from bottomleft to top right) internal data is displayed in the lower part ofthe display.For more details:http://www.hs-koblenz.de/profile/kroeber/Keywords: acoustic, frequency, tone detection, frequency analysis,third octave analysis, dBA, FFT
vibration analysis 1.0 icon
vibration analysis 1.0 APK
Kröber
Acceleration measurement and determination of therelevantfrequency, the acceleration and the amplitude of theoscillationExplanation of the buttons arranged on top of the screenCONTI:Continuous measurement 5 SEC: Fixed measurement duration of 5sec,then STOP automatically STOP: Stop of measurement, the last5seconds are displayed -: In stop mode, move zoom window(1.28sec)to the left, only for PRO version +: In stop mode, movezoom window(1.28sec) to the right, only for PRO version There aresevenfigures below the buttons. Upper figure "Currentaccelerationvalues": The accelerations values are displayed. Thesamplingfrequency of most smartphones is 50 Hz. If the actualsamplingfrequency deviates by ± 1 Hz, then the actual samplingfrequencyappears (flashing). Different times must then becorrectedaccordingly. The numerically displayed measured valuesarecorrected automatically. During a swipe action "from bottom lefttotop right", the APP goes into a diagnostic mode. Then theactualsampling frequency, the standard deviation of thesamplingfrequency and an internal counter appear. Underneathfigure"Accelerations over time": It shows the accelerations curveof thelast 5 seconds. After pressing STOP, a window of 1.28 sec ismarked(vertical black bars). in PRO version: the window can bemoved by±, after a double-tap on the figure it appears twice aslarge,after another double-tip it is resized again. Swipe up, swipedownto change the scaling. Underneath figure "Largest of thethreeacceleration components curve": It shows the accelerationcomponentwith the maximum acceleration change. The zoom windowisrepresented by 1.28 sec. It is particularly suitableforoscillation frequencies from 1 Hz to 15 Hz. The more sinusoidalthetime signal, the more secure are the determined values.Indiagnostic mode, trigger points and sine approximationsarevisible. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the scaling.Underneathfigure "Numerical evaluation from the time signal":Hereevaluations from the time domain are displayed numerically. Inthediagnostic mode, the number of detected vibrations aredisplayed.Sx is their standard deviation. The larger n and smallerSx, thesafer the values determined. The acceleration amplitudealsospecifies a standard deviation. The calculation is done withtheleast square method. Underneath figure "FFT-writing oftheacceleration over time": Here, a plot of the accelerationspectrumover time is shown. Shown are the last 5 seconds. The zoomwindowis marked. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the intensityscale.Underneath figure "FFT spectrum of the zoom window": It showstheFFT spectrum within the zoom window. The black curve istheresulting acceleration. In PRO version: after a double tip onthefigure it appears twice as large, after another double-tip itisresized again. Swipe up, swipe down to change thescaling.Underneath figure "FFT, numeric": It is the numeric outputof theFFT spectrum within the zoom window. The maximum of the FFTisindicated by a cross. Frequency, Amplitude and maximumaccelerationvalues are shown.
control loop 1.0 icon
control loop 1.0 APK
Kröber
The APP is based on a PT2 system with deadtimeand a PI controller. With the parameters a Bode diagram iscreated,and, alternatively, a simulation is performed in the timedomain.Explanation:BODE: With the given values a Bode diagram is drawnControlled system PT2 red, Dead time black, PI controller blue,openloop greenSIM: Simulation of a Setpoint step functionSet point red, manipulated variable blue, controlledvariablegreenWiping in the left area upwards increases Kp by a factorof1.1Wiping in the left area downwards decreases Kp by a factorof1.1Wiping in the right area upwards increases Tn by a factorof1.1Wiping in the right area downwards decreases Tn by a factorof1.1These changes are only effective within the simulation.RES: Resetting to the default valuesGeneral limitations in calculations:T1min = T2min = Tnmin = 0.1s Ttmax = 9.9sAdditional limitations in the simulation:0.1 <= Kp <= 99.99 0.1s <= Tn <= 99.99s Ks >=0.2
vibration analysis pro 1.0 icon
vibration analysis pro 1.0 APK
Kröber
Acceleration measurement and determination of the relevantfrequency, the acceleration and the amplitude of the oscillationExplanation of the buttons arranged on top of the screen CONTI:Continuous measurement 5 SEC: Fixed measurement duration of 5 sec,then STOP automatically STOP: Stop of measurement, the last 5seconds are displayed -: In stop mode, move zoom window (1.28sec)to the left, only for PRO version +: In stop mode, move zoom window(1.28sec) to the right, only for PRO version There are sevenfigures below the buttons. Upper figure "Current accelerationvalues": The accelerations values are displayed. The samplingfrequency of most smartphones is 50 Hz. If the actual samplingfrequency deviates by ± 1 Hz, then the actual sampling frequencyappears (flashing). Different times must then be correctedaccordingly. The numerically displayed measured values arecorrected automatically. During a swipe action "from bottom left totop right", the APP goes into a diagnostic mode. Then the actualsampling frequency, the standard deviation of the samplingfrequency and an internal counter appear. Underneath figure"Accelerations over time": It shows the accelerations curve of thelast 5 seconds. After pressing STOP, a window of 1.28 sec is marked(vertical black bars). in PRO version: the window can be moved by±, after a double-tap on the figure it appears twice as large,after another double-tip it is resized again. Swipe up, swipe downto change the scaling. Underneath figure "Largest of the threeacceleration components curve": It shows the acceleration componentwith the maximum acceleration change. The zoom window isrepresented by 1.28 sec. It is particularly suitable foroscillation frequencies from 1 Hz to 15 Hz. The more sinusoidal thetime signal, the more secure are the determined values. Indiagnostic mode, trigger points and sine approximations arevisible. In PRO version: after a double tip on the figure itappears twice as large, after another double-tip it is resizedagain. Swipe up, swipe down to change the scaling. Underneathfigure "Numerical evaluation from the time signal": Hereevaluations from the time domain are displayed numerically. In thediagnostic mode, the number of detected vibrations are displayed.Sx is their standard deviation. The larger n and smaller Sx, thesafer the values determined. The acceleration amplitude alsospecifies a standard deviation. The calculation is done with theleast square method. Underneath figure "FFT-writing of theacceleration over time": Here, a plot of the acceleration spectrumover time is shown. Shown are the last 5 seconds. The zoom windowis marked. In PRO version: after a double tip on the figure itappears twice as large, after another double-tip it is resizedagain. Swipe up, swipe down to change the intensity scale.Underneath figure "FFT spectrum of the zoom window": It shows theFFT spectrum within the zoom window. The black curve is theresulting acceleration. In PRO version: after a double tip on thefigure it appears twice as large, after another double-tip it isresized again. Swipe up, swipe down to change the scaling.Underneath figure "FFT, numeric": It is the numeric output of theFFT spectrum within the zoom window. The maximum of the FFT isindicated by a cross. Frequency, Amplitude and maximum accelerationvalues are shown.
vibration analysis pro 1.0 icon
vibration analysis pro 1.0 APK
Kröber
Acceleration, frequency, acceleration amplitude and oscillationamplitude
vibration plate 1.0 icon
vibration plate 1.0 APK
Kröber
The APP displays an animation of the behavior of a vibration plate.