WiT BWT901CL User Manual Download Page 41

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BWT901CL | manual v0707 | http://wiki.wit-motion.com/english

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3.3.2 Magnetic field calibration

Step 1. Click "Calibration" menu

Step 2. Click the "Magnetic calibration" button

Step 3. Slowly rotate the module 360° around X, Y, Z, 3-axis accordingly

Step 4. After rotation, click “Finish”

Check the result: The Z-axis angle will have fewer drift than before.
Notice: If not successful, please stay away from the objective that can create
magnetic field interference.

Summary of Contents for BWT901CL

Page 1: ...BWT901CL manual v0707 http wiki wit motion com english 1 USER MANUAL BWT901CL Bluetooth 2 0 Inclinometer Sensor...

Page 2: ...you 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: ...ection 8 2 1 2 USB HID Connection 10 2 1 3 PC s Bluetooth Connection 11 2 2 Software Introduction 12 2 2 1 Main Menu 12 2 2 2 Menu of Configuration 13 2 3 Calibration 17 2 3 1 Accelerometer Calibratio...

Page 4: ...nstructions with Android Phone 35 3 1 APP Installation 35 3 2 Connection 36 3 2 1 APP Pairing 36 3 2 2 Phone s Bluetooth Pairing 38 3 3 Calibration 40 3 3 1 Acceleration Calibration 40 3 3 2 Magnetic...

Page 5: ...y BWT901CL is an CE standard accelerometer It is employed where the highest measurement accuracy is required BWT901CL offers several advantages over competing sensor Heated for best data availability...

Page 6: ...o the burning of the circuit board For proper instrument grounding use WITMOTION with its original factory made cable or accessories Do not access the I2C interface Do not change the baud rate because...

Page 7: ...BWT901CL manual v0707 http wiki wit motion com english 7...

Page 8: ...ions with PC 2 1 Connection Method PC software is only compatible with Windows system BWT901CL Playlist 2 1 1 Serial Connection Step 1 Connect the sensor with a serial converter PIN Connection VCC 5V...

Page 9: ...sage 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 Insert the converter to computer and confirm the com por...

Page 10: ...Insert the USB HID adapter into USB slot of computer Step 2 Turn on the sensor after red light of HID adapter flashes Step 3 Wait till the sensor s blue LED light remains on means pairing succeeded S...

Page 11: ...on computer s Bluetooth Step 2 Turn on the sensor Step 3 Search HC 06 device and input pairing password 1234 Step 4 Confirm the outgoing com port on More Bluetooth Options page Step 5 Open software M...

Page 12: ...left 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 13: ...com english 13 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...

Page 14: ...or Menu of Calibrate Button Function Acceleration Accelerometer calibration Magnetic Field Magnetometer calibration Reset Height Reset height data to 0 only for sensor built in barometer including WT9...

Page 15: ...th sensor series Pressure Pressure output only available with the sensor built in barometer like HWT901B WTGAHRS2 WT901B etc Location Latitude Longitude data output only for GPS IMU series such as WTG...

Page 16: ...wit motion com english 16 D2 Model Not available for Bluetooth sensor series D3 Model Not available for Bluetooth sensor series Pulse width Not available for Bluetooth sensor series Cycle Not availab...

Page 17: ...2 3 1 Accelerometer 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 calib...

Page 18: ...ult confirm if there is 1g on Z axis acceleration 1 After1 2 seconds the three axial acceleration value of the module is about 0 0 1 the X and Y axis Angle is around 0 After calibration the x y axis A...

Page 19: ...nsor will have a large zero error when it is manufactured If it is not calibrated it will bring a large measurement error which will affect the accuracy of the measurement of the z axis Angle of the h...

Page 20: ...BWT901CL manual v0707 http wiki wit motion com english 20 Step 3 Slowly rotate the module 360 around X Y Z 3 axis accordingly...

Page 21: ...not successful please stay away from the objective that can create magnetic field interference 2 3 3 Gyroscope Automatic Calibration The gyroscope calibration is to calibrate the angular velocity and...

Page 22: ...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 degree When the module is used before and z axis drift is large the z a...

Page 23: ...BWT901CL manual v0707 http wiki wit motion com english 23 2 3 5 Reset Height to 0 Only available for the module built in barometer like WT901B HWT901B WTGAHRS1 WTGAHRS2...

Page 24: ...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 BWT901CL as an example the default output of the module is acc...

Page 25: ...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 communication the module will autom...

Page 26: ...BWT901CL manual v0707 http wiki wit motion com english 26 2 4 4 Data Recording Method are as follows Step 1 Click Record and Begin Step 2 Click Stop...

Page 27: ...t 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 28: ...recorded 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...

Page 29: ...BWT901CL manual v0707 http wiki wit motion com english 29 Step 4 Click Run and the Binary file will be playback When playback the rate can be editable...

Page 30: ...BWT901CL manual v0707 http wiki wit motion com english 30 2 4 6 Standby and Wake Up Not available for Bluetooth sensor series...

Page 31: ...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 32: ...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 33: ...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 34: ...lculated and analyzed based on the magnetic field Z axis angle will have few drift The default algorithm of BWT901CL is 9 axis If there is magnetic field interference around installed environment it i...

Page 35: ...ndroid APP About Android APP 1 Note Paired devices can be searched without turning on positioning According to Google s requirements if APP installed on a higher version of Android 6 0 mobile phone pa...

Page 36: ...wit motion com english 36 3 2 Connection 3 2 1 APP Pairing Step 1 Install the APK file give permission of Location and Storage Step 2 Open APP and choose 9 axis Series Step 3 Turn on the sensor and s...

Page 37: ...BWT901CL manual v0707 http wiki wit motion com english 37 Step 4 When pairing is done the blue LED light of sensor will remain still After a few seconds the data will show automatically...

Page 38: ...le give permission of Location and Storage Step 2 Turn on the Bluetooth in the setting menu of smartphone Step 3 Search the Bluetooth sensor First pairing the device will be recognize as mac address a...

Page 39: ...com english 39 Step 5 Open the WITMOTION APP and choose 9 axis Series Step 6 Click Scan and select the paired Bluetooth device HC 06 No need to input password Step 7 The Blue LED light of sensor will...

Page 40: ...tion BWT901CL Playlist 3 3 1 Acceleration Calibration Step 1 Keep the module horizontally stationary Step 2 Click the Calibration menu Step 3 Click the Acceleration Calibration and wait for 3 seconds...

Page 41: ...Step 2 Click the Magnetic calibration button Step 3 Slowly rotate the module 360 around X Y Z 3 axis accordingly Step 4 After rotation click Finish Check the result The Z axis angle will have fewer dr...

Page 42: ...ep 2 Plugin the USB HID adapter in the beginning Step 3 Turn on the sensor after the red light of USB HID adapter begins flashing Step 4 Wait till sensor s blue LED light keeps on means pairing succee...

Page 43: ...on Link to download all sample code Link to sample code instructions demo Notice There is no sample code provided for Linux or Python system at present 5 1 Arduino Download link Arduino UNO3 Demo Link...

Page 44: ...BWT901CL manual v0707 http wiki wit motion com english 44 5 5 C DEMO link 5 6 Matlab Receive Sample Code Dataplot DEMO...

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