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WiT WT901SD, User Manual

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WiT WT901SD User Manual Download Page 30

WT901SD | manual v0707 | http://wiki.wit-motion.com/english

- 30 -

2.4.10

Bandwidth

Default bandwidth is 20Hz.

Function:
1. The higher rate of bandwidth setting will lead to the higher fluctuation in data
waveform. Conversely, the lower rate of bandwidth, data will become more
fluent.
For example:
Bandwidth as 20Hz, Output rate as 10Hz. The waveform is very steady.

Summary of Contents for WT901SD

Page 1: ...WT901SD manual v0707 http wiki wit motion com english 1 USER MANUAL WT901SD Inclinometer Sensor Acceleration Data Logger...

Page 2: ...ou need in the provided documents please contact our support team Our engineering team is committed to providing the required support necessary to ensure that you are successful with the operation of...

Page 3: ...Software Introduction 9 2 2 1 Main Menu 9 2 2 2 Menu of Configuration 10 2 3 Calibration 14 2 3 1 Accelerometer Calibration 14 2 3 2 Magnetic Field Calibration 15 2 3 3 Gyroscope Automatic Calibration...

Page 4: ...8 Standby and Wake Up 28 2 4 9 Placement Direction 29 2 4 10 Bandwidth 30 2 4 11 Restore Factory Setting 32 2 4 12 Set IIC Address 33 2 4 13 Set Extended Port 34 2 4 14 6 axis 9 axis Algorithm 36 3 Of...

Page 5: ...an CE standard accelerometer It is employed where the highest measurement accuracy is required WT901SD offers several advantages over competing sensor Heated for best data availability new WITMOTION...

Page 6: ...ower supply can lead to permanent damage to the sensor VCC cannot connect with GND directly otherwise it will lead to the burning of the circuit board For proper instrument grounding use WITMOTION wit...

Page 7: ...d to connect with the PC software before offline record 2 1 Connection Method PC software is only compatible with Windows system Link to WT901SD s demo video 2 1 1 Serial Connection Step 1 Connect the...

Page 8: ...age Link to tutorial of 3 in 1 serial converter TTL serial cable CH340 driver Link to tutorial of 6 in 1 serial converter CP2102 driver Step 3 Plugin the converter to computer and confirm the com port...

Page 9: ...eft side Record Record function 3D 3D DEMO Config Configuration setting Help Language English or Chinese Bluetooth Set Binding device or unbind Firmware update Option for firmware update About Minimu...

Page 10: ...om english 10 2 2 2 Menu of Configuration Menu of Configuration Button Function Read Config Reading the current configuration Lock Lock the sensor Unlock Unlock the sensor Calibrate Time Calibration t...

Page 11: ...puter to conflict with the mouse causing the mouse to jump After checking this function the function will take effect the next time the module is used or it can take effect when the module is powered...

Page 12: ...C address Menu of Content Button Function Time Time data output Acceleration Acceleration data output Velocity Angular velocity data output Angle Angle data output Magnetism Magnetic field data output...

Page 13: ...including Satellite quantity PDOP HDOP VDOP data only available when the sensor connecting with GPS module such as WTGAHRS1 WTGAHRS2 GPS IMU GPS Original Only output GPS raw data only available when...

Page 14: ...ter Calibration Purpose The accelerometer calibration is used to remove the zero bias of the accelerometer Before calibration there will be different degrees of bias error After calibration the measur...

Page 15: ...ngle is accurate Note When putting the module horizontal there is 1g of gravitational acceleration on the Z axis 2 3 2 Magnetic Field Calibration Purpose Magnetic calibration is used to remove the zer...

Page 16: ...aration Sensors should be 20CM away from magnetic and iron and other materials Methods Step 1 Open the Config menu Step 2 Click the magnetic field calibration button click the Start calibration Step 3...

Page 17: ...wit motion com english 17 Step 4 After rotation click End calibration Successful result Most of data dots will be within the ellipse If not successful please stay away from the objective that can crea...

Page 18: ...z axis angle is an absolute angle and it takes the northeast sky as the coordinate system can not be relative to 0 degree Z axis to 0 is to make the initial angle of the z axis angle is relative 0 deg...

Page 19: ...t of the data return can be set according to user needs click the configuration option bar and check the data content to be output Taking WT901SD as an example the default output of the module is acce...

Page 20: ...turn rate supports 200Hz 10Hz refers to 10 packets returned every second There contain 33bytes in a data packet in default Reminder If there being many types of return data and low baud rate of commun...

Page 21: ...dule you need to select the baud rate to be changed in the communication rate drop down box in the configuration bar based on the correct connection between the software and the module Note After the...

Page 22: ...v0707 http wiki wit motion com english 22 2 4 4 Calibrate Time Method Step 1 Click Calibrate Time in the Config Step 2 Click Time Step 3 Notification will be shown if successfully calibrated Step 4 Cl...

Page 23: ...WT901SD manual v0707 http wiki wit motion com english 23 2 4 5 Data Recording Method are as follows Step 1 Click Record and Begin Step 2 Click Stop...

Page 24: ...the data as txt file Notice If there is repeated TIME of data that s caused by low resolution of the Windows system s time The changes in other data is correct It is highly recommended that data can...

Page 25: ...ecorded file each time there will a BIN file created in the folder of record file in path of installed software meanwhile Recorded data playback method Step 1 Disconnect the sensor Step 2 Click File B...

Page 26: ...WT901SD manual v0707 http wiki wit motion com english 26 Step 4 Click Run and the Binary file will be playback When playback the rate can be editable...

Page 27: ...e Conversion Tutorial to convert SD card TSV file format data to a TXT Step 1 After the data can be played back click File Conversion Step 2 After the conversion reaches 100 it will pop up whether to...

Page 28: ...aused working and entered the standby mode Power consumption is reduced after sleeping Wake up The module enters the working state from the standby state The module defaults to a working state in the...

Page 29: ...installation direction of the module is horizontal When the module needs to be installed vertically the vertical installation can be set Step 1 Rotate the module 90 degrees around the X axis Step 2 Pl...

Page 30: ...Default bandwidth is 20Hz Function 1 The higher rate of bandwidth setting will lead to the higher fluctuation in data waveform Conversely the lower rate of bandwidth data will become more fluent For...

Page 31: ...aveform will show more fluctuation 2 The higher rate of bandwidth will solve the data repeating problem For example if the bandwidth setting is 20Hz retrieval rate as 100Hz there will be 5 repeating d...

Page 32: ...of the module is on continuously for about 2 seconds The LED is off and the factory reset operation is completed Command method connect the WT901SD module and the computer through the USB TTL module...

Page 33: ...0x50 which can be changed by software Change the IIC address only when the module connect to PC program successfully and enter the new 16 hexadecimal IIC address and click the change button Reminder T...

Page 34: ...ate Digital high level output mode Port output state Digital low level output mode Port output state PWM output mode PWM high level width CLR D1 The XY relative attitude 0 Analog input mode is used to...

Page 35: ...WT901SD manual v0707 http wiki wit motion com english 35...

Page 36: ...alculated and analyzed based on the magnetic field Z axis angle will have few drift The default algorithm of WT901SD is 9 axis If there is magnetic field interference around installed environment it i...

Page 37: ...o the data will have a Time to know when the data starts to be recorded There will be a 16G SD card and a SD card reader came with the sensor as accessory Please refer to Chapter 2 4 4 Step 1 Insert t...

Page 38: ...T file inside the card reader The figure below is LOG00002 TXT 2 The module fast output is a hexadecimal number TXT file with Notepad or Word open is an ASCLL garbled you need to open the file with a...

Page 39: ...WT901SD manual v0707 http wiki wit motion com english 39 Step 3 Select the recorded file from the USB Drive path and load the recorded file click the Run and data will be playback...

Page 40: ...01SD manual v0707 http wiki wit motion com english 40 Step 4 Convert the recorded file to txt format when the file is 100 loaded It would be better to review Please refer to Chapter 2 4 7 File Convers...

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