WiT WTVB01-BT50 User manual

WTVB01-BT50 Vibration sensor instruction manual
Product specification:
Type number: WTVB01-BT50
Description: Bluetooth 5.0 vibration sensor
1. Product overview
1, module internal voltage stability circuit, internal equipped with lithium battery,
3.7V power supply, easy connection.
2, the use of advanced digital filtering technology, can effectively reduce the
measurement noise, improve the measurement accuracy.
3. At the same time, provide various kinds of upper computer, use instructions,
development manuals required by users, so that the research and development time
for various needs is reduced to the minimum.
4, Support Type-C interface, convenient for users to choose the best connection mode.
Serial port rate 115200bps.
5. The cut-off frequency is adjustable from 0 to 100Hz, and the detection cycle is
adjustable from 1 to 100Hz.
6, three axis displacement, three axis speed, three axis Angle, three axis frequency
output, to meet the user's vibration and impact comprehensive measurement, judge
whether the measured object (motor water pump) is damaged. If there is a machine
fault caused by bearing wear, bearing cracking, poor dynamic balance and moderate
factors, vibration sensor can detect the fault in advance and put forward an early
warning, to prevent the machine from continuing to work in bad condition and causing
damage, thus bringing economic losses.
7, application field: can be widely used in submersible pump, fan, turbine unit,
coal mill, system. The bearing vibration measurement and real-time monitoring of
oxygen machine, generator, centrifuge, compressor, water pump, motor and other
rotating machinery.
2. Parameter indicators
Basic parameter
parameter
condition
Minimum value
default
Maximum value
Communication
interfac
UART
115200bps
115200bps
115200bps

Output content
3 axis vibration velocity, 3 axis vibration Angle, 3 axis
vibration displacement, 3 axis vibration frequency,
temperature
range
Vibration speed: 0~50mm/s
Vibration Angle: 0~180°
Vibration displacement: 0~30000um
Detection cycle
1Hz
100Hz
100Hz
Cut-off
frequency
1Hz
10Hz
100Hz
Startup time
1000ms
Cascade
quantity
Bluetooth
multi-link
adapter
4个
Bluetooth
transmission
distance
Bluetooth 5.0
(open
environment)
50m
Operating
temperature
-20℃
60℃
Storage
temperature
-40℃
85℃
3. Electrical parameter
parameter
condition
Minimum value
default
Maximum value
Charging
voltage
5V
Battery voltage
3.7V
Working
current
15mA(3.7V)
Standby current
10uA(3.7V)
Battery capacity
260mAH

Battery capacity
6 hours
8 hours
Charging time
2 hours
3 hours
4. Software usage method
3.1 Connecting to an App
https://wit-motion.yuque.com/wumwnr/bf4d0f/bgclg0g6g1nm3qk7?singleDoc#
3.2 Connecting the Host Computer
Download from upper computer:
https://wit-motion.cn/#/witmotion/literature/download?id=1526108478018232321
First, automatic search：
1. Search for the sensor model.
2. Click Search Device and select Bluetooth device WTVB01_BT50.
After successful connection, data can be displayed on the software, as shown in the
figure below:

Two, manual connection
Type_C data cable to connect computer
1. Select the device name.
2. Select the serial port number.
3. Set baud rate to 115200,
4. Click Add.
3.3 Curve Chart

Click on the graph, there are curves of vibration velocity, vibration Angle,
vibration displacement and temperature (normal mode); In high-speed mode, only the
vibration displacement curve has data, as shown in the figure below:
3.4 Scatter diagram
In order to obtain the complete vibration displacement scatter diagram, it is
recommended to use the high-speed mode to view
4. Configure the software
4.1 Restoring Settings

Click "Configuration", and click "Restore Settings" in the sensor configuration
interface to restore factory Settings, as shown in the picture below:
4.2 Restart
Click "Configure", and click "Restart" in the sensor configuration interface to
restart the sensor, as shown in the figure below:
4.3 Cut-off frequency
Open "Configuration", click the drop-down menu of "Cutoff frequency" in the sensor
configuration interface, and select the corresponding cutoff frequency to set the
cutoff frequency (the default cutoff frequency is 10.0Hz). Our cutoff frequency is

used in this way (excitation with amplitude sinusoidal signal, constantly changing
the frequency, the corresponding frequency when the output amplitude decreases to
0.707 times of the input is the cutoff frequency. The output amplitude is greater
than or equal to 0.707 times the frequency range of the input amplitude, that is,
the working frequency range. We can change the cut-off frequency to filter out
clutter of other frequencies. For example, the frequency of other clutter is 30Hz,
and the sensor works at 50Hz, so we may as well set the cut-off frequency to 40.0
and 50.0Hz.
4.4 Detection Cycle
Open "Configuration", click the drop-down menu of "Detection cycle" in the sensor
configuration interface, and select the corresponding detection cycle to set the
detection cycle (the default detection cycle is 100Hz, and the detection cycle can
be considered as the number of output packets per second), as shown in the figure:

4.5 Recording Data
Open "Record" and click "Start Record" to record the output data of the sensor.
Step 5: Register
5.1 Register address table
address
symbol
meaning

0x00
SAVE
Save, restart, or restore to factory
defaults
0x03
RRATE
Return rate
0x1A
IICADDR
Device address
0x3A
VX
X axis vibration velocity
0x3B
VY
Y-axis vibration velocity
0x3C
VZ
Z axis vibration velocity
0x3D
ADX
X axis Angle vibration Angle
0x3E
ADY
Y axis Angle vibration Angle
0x3F
ADZ
Z axis Angle vibration Angle
0x40
TEMP
Product temperature
0x41
DX
X axis vibration displacement
0x42
DY
Y-axis vibration displacement
0x43
DZ
Z axis vibration displacement
0x44
HZX
X axis vibration frequency
0x45
HZY
Y-axis vibration frequency
0x46
HZZ
Z axis vibration frequency
0x47
FDNFX
X-axis vibration displacement
(high-speed mode)
0x48
FDNFY
Y-axis vibration displacement
(high-speed mode)

0x49
FDNFZ
Z axis vibration displacement (high
speed mode)
0x5d
CUTOFFFREQI
Cutoff frequency integer
0x5e
CUTOFFFREQF
Cutoff frequency decimal
0x5f
SAMPLEFREQ
Detection cycle
0x64
BatPer
Electric quantity
5.2 Module Uppermost computer
By default, the module will upload the data of Flag=0x61(vibration speed, vibration
Angle, temperature, vibration displacement and vibration frequency), totaling 28
bytes.
Packet
Data packet header
Data packet header
1Byte
Flagbit
1Byte
VXL
VXH
......
YawL
YawH
0x55
Flag
0xNN
0xNN
......
0xNN
0xNN
Note: 0xNN is the specific value received. The order of data return is vibration velocity XYZ,
vibration Angle XYZ, temperature, vibration displacement XYZ, vibration frequency XYZ, low byte
first, high byte last.
Flag = 0x61 Data content 26Byte indicates vibration speed, vibration Angle, temperature,
vibration displacement, and vibration frequency
0x55
Data packet header
0x61
标志位
VXL
X axis vibration speed is 8 bits lower
VXH
X axis vibration speed is 8 bits higher
VYL
Y-axis vibration velocity is 8 bits lower
VYH
Y-axis vibration velocity is 8 bits higher
VZL
Z-axis vibration speed is 8 bits lower

VZH
Z-axis vibration speed is 8 bits higher
ADXL
The vibration Angle of X axis is 8 digits lower
ADXH
X axis vibration Angle is 8 bits higher
ADYL
Y-axis vibration Angle is 8 bits lower
ADYH
Y-axis vibration Angle is 8 bits higher
ADZL
Z-axis vibration Angle is 8 bits lower
ADZH
Z-axis vibration Angle is 8 bits higher
TEMP
The temperature is 8 bits lower
TEMP
The temperature is 8 bits higher
DXL
X-axis vibration displacement is 8 bits lower
DXH
X axis vibration displacement is 8 bits higher
DYL
X axis vibration displacement is 8 bits higher
DYH
Y-axis vibration displacement is 8 bits higher
DZL
Z-axis vibration displacement is 8 bits lower
DZH
Z axis vibration displacement is 8 bits higher
HZXL
The vibration frequency of X axis is 8 digits
lower
HZXH
The vibration frequency of X axis is 8 bits higher
HZYL
Y-axis vibration frequency is 8 digits lower
HZYH
Y-axis vibration frequency is 8 bits higher
HZZL
Z-axis vibration frequency is 8 digits lower
HZZH
Z-axis vibration frequency is 8 bits higher
Calculation method of vibration velocity: Unit (mm/s)
Register name: VX~VZ
Register address: 58~60 (0x3A~0x3C)
Read/write direction: R

Default value:0x0000
Bit
NAME
FUNCTION
15:0
VX[15:0]
Vibration velocity VX（mm/S）=((VXH << 8)| VXL)
15:0
VY[15:0]
Vibration velocity VY（mm/S） =((VYH << 8)| VYL)
15:0
VZ[15:0]
Vibration velocity VZ（mm/S） =((VZH << 8)| VZL)
Example：55 61 11 00 16 00 02 00 02 00 00 00 01 00 E6 0A 43 00 47 00 0A 00 25 00 25 00 25 00
VXL: 0x11 VXH: 0x00 VYL: 0x16 VYH: 0x00 VZL: 0x02 VZH: 0x00
Vibration velocity VX（mm/s）=(((short)VXH << 8)| VXL) = 0x0011 = 17(mm/s)
Vibration velocity VX（mm/s）=(((short)VXH << 8)| VXL) = 0x0016 = 22(mm/s)
Vibration velocity VX（mm/s）=(((short)VXH << 8)| VXL) = 0x0002 = 2(mm/s)
Vibration Angle calculation method: Unit (°)
Register name: ADX~ADZ
Register address: 61~63(0x3D~0x3F)
Read/write direction: R
Default value: 0x0000
Bit
NAME
FUNCTION
15:0
ADX[15:0]
Vibration Angle ADX(°)=((ADXH << 8)| ADXL)/32768*180
15:0
ADY[15:0]
Vibration Angle ADY(°)=((ADYH << 8)| ADYL)/32768*180
15:0
ADZ[15:0]
Vibration Angle ADZ(°)=((ADZH << 8)| ADZL)/32768*180
Example：55 61 11 00 16 00 02 00 02 00 00 00 01 00 E6 0A 43 00 47 00 0A 00 25 00 25 00 25 00
ADXL: 0x02 ADXH: 0x00 ADYL: 0x00 ADYH: 0x00 ADZL: 0x01 ADZH: 0x00
Vibration velocity ADX =(((short)ADXH << 8)| ADXL) /32768*180 = 0x0002/32768*180 = 0.011(°)
Vibration velocity ADX =(((short)ADXH << 8)| ADXL) /32768*180 = 0x0000/32768*180 = 0.00(°)
Vibration velocity ADX =(((short)ADXH << 8)| ADXL) /32768*180 = 0x0001/32768*180 = 0.005(°)
Temperature calculation method: Unit (℃)
Register name: TEMP
Register address: 64 (0x40)
Read/write direction: R
Default value: 0x0000

Bit
NAME
FUNCTION
15:0
TEMP[15:0]
Temperature=TEMP[15:0]/100℃
Example:55 61 11 00 16 00 02 00 02 00 00 00 01 00 E6 0A 43 00 47 00 0A 00 25 00 25 00 25 00
TEMPL：0xE6 TEMPH：0x0A
TEMP[15:0] =(((short)TEMPH <<8)|TEMPL)/100 = 0x0AE6 /100= 2790/100 = 27.90(℃)
Vibration displacement calculation method: Unit (um)
Register name: DX~DZ
Register address: 65~67 (0x41~0x43)
Read/write direction: R
Default value: 0x0000
Bit
NAME
FUNCTION
15:0
DX[15:0]
Vibration displacement DX(um)=((DXH << 8)| DXL)
15:0
DY[15:0]
Vibration displacement DY(um)=((DYH << 8)| DYL)
15:0
DZ[15:0]
Vibration displacement DZ(um)=((DZH << 8)| DZL)
Example: 55 61 11 00 16 00 02 00 02 00 00 00 01 00 E6 0A 43 00 47 00 0A 00 25 00 25 00 25 00
DX[15:0]=(((short)DXH <<8)|DXL) = 0x0043 = 67(um)
DY[15:0]=(((short)DYH <<8)|DYL) = 0x0047 = 71(um)
DZ[15:0]=(((short)DZH <<8)|DZL) = 0x000A = 10(um)
Vibration frequency calculation method: Unit (Hz)
Register name: HZX~HZZ
Register address: 68~70 (0x44~0x46)
Read/write direction: R
Default value: 0x0000
Bit
NAME
FUNCTION
15:0
HZX[15:0]
vibration frequency HZX(Hz)=((HZXH << 8)| HZXL)
15:0
HZY[15:0]
vibration frequency HZY(Hz)=((HZYH << 8)| HZYL)
15:0
HZZ[15:0]
vibration frequency HZZ(Hz)=((HZZH << 8)| HZZL)

Example：55 61 11 00 16 00 02 00 02 00 00 00 01 00 E6 0A 43 00 47 00 0A 00 25 00 25 00 25 00
HZX[15:0]=(((short)HZXH <<8)|HZXL) = 0x0025 = 37(Hz)
HZY[15:0]=(((short)HZYH <<8)|HZYL) = 0x0025 = 37(Hz)
HZZ[15:0]=(((short)HZZH <<8)|HZZL) = 0x0025 = 37(Hz)
5.3 Host computer to module
Read register packet
The single return packet needs to send the register reading instruction first. The
instruction format is as follows:
FF AA 27 XX 00
XX refers to the number of the corresponding register. The number of the register is
referred to. The example of sending instructions is as follows:
function
instruction
Read temperature
FF AA 27 40 00
After sending this instruction, the module will send back a data packet starting with
0x55 0x71, which contains the data corresponding to the start register address, the
start register address and the following 7 register data (8 registers are fixed to be
uploaded). The format of the return data is as follows:
Start register (2Byte) + Register data (16Byte,8 registers)
baotou
Flag bit
Start
register
address
low
Start
register
address
high
Register
1 data
low
The
number
of register
1 is high
......
Register 8
data low
Register 8
data high
0x55
0x71
RegL
RegH
0xNN
0xNN
......
0xNN
0xNN
Note: 0xNN is the specific value received, with the low byte first and the high byte
second.
Set instruction description
function
instruction
Unlock (useful for 10 seconds)
FF AA 69 88 B5
set
FF AA register address Register value Low
register value high
save
FF AA 00 00 00

Set instruction
FF AA 00 SAVE 00
Save, restart, or restore to factory defaults
FF AA 03 RATE 00
Set the return transmission rate
FF AA 5D CUTOFFFREQI 00
Cut-off frequency integer part (0~100)
FF AA 5E CUTOFFFREQF 00
Cutoff frequency fractional part (0~99)
FF AA 5F SAMPLEFREQ 00
Detection cycle (1~100Hz)
Register description
SAVE (save/restart/restore to factory)
Register name: SAVE
Register address: 0 (0x00)
Read/write direction: R/W
Default value: 0x0000
Bit
NAME
FUNCTION
15:0
SAVE[15:0]
Save: 0x0000
Restart: 0x00FF
Restore factory default:
0x0001
Example: FF AA 69 88 B5 (Useful for unlocking within 10S)
FF AA 00 00 00 (Save)
ATE (Save/restart/restore factory defaults)
Register name: RATE
Register address: 3 (0x03)
Read/write direction: R/W
Default value: 0x0006
Bit
NAME
FUNCTION
15:0
RATE[15:0]
0x01：0.1Hz
0x02：0.5Hz
0x03：1Hz
0x04：2Hz
0x05：5Hz
0x06：10Hz (Default)
0x07：20Hz

0x08：50Hz
0x09：100Hz
0x0A：200Hz
Example: FF AA 69 88 B5 (Useful for unlocking within 10S)
FF AA 03 06 00 (Set the return rate to 10Hz)
FF AA 00 00 00 (Save)
CUTOFFFREQI, CUTOFFFREQF (cutoff frequency)
Register name: CUTOFFFREQI (integer 0~100)
Register address: 93(0x5d)
Read/write direction: R/W
Default value: 0x000A
Bit
NAME
FUNCTION
15:2
1:0
CUTOFFFREQI[1:0]
The cut-off frequency is
used to filter out the
interference of other
clutter to the sensor. The
cut-off frequency can be
set between 0.00 and
100.00Hz
Example: Set the cut-off frequency to 10.99Hz
Send: FF AA 69 88 B5 (useful for unlocking within 10S)
FF AA 5D 0A 00 (Set the integer part of the cutoff frequency to 10)
FF AA 5E 63 00 (Set cut-off frequency to 99 for decimal part)
FF AA 00 00 00 (Save)CUTOFFFREQI and CUTOFFFREQF registers are required for cutofffreqf
cut-off frequency setting
Cutoff frequency decimal part description: Set the small value X100 (set.99, actually need to
set the decimal part to 99)
Register name: CUTOFFFREQF (set decimal 0~99 equal to set 0.00~0.99)
Register address: 94(0x5e)
Read/write direction: R/W
Default value: 0x000A
Bit
NAME
FUNCTION
15:2
1:0
CUTOFFFREQF[1:0]
The cut-off frequency is used to
filter out the interference of
other clutter to the sensor. The
cut-off frequency can be set
between 0.00 and 100.00Hz

Example: Set the cut-off frequency to 10.99Hz
Send: FF AA 69 88 B5 (useful for unlocking within 10S)
FF AA 5D 0A 00 (Set the integer part of the cutoff frequency to 10)
FF AA 5E 63 00 (Set cut-off frequency to 99 for decimal part)
FF AA 00 00 00 (Save)CUTOFFFREQI and CUTOFFFREQF registers are required for cutofffreqf
cut-off frequency setting
Cutoff frequency decimal part description: Set the small value X100 (set.99, actually need to
set the decimal part to 99)
SAMPLEFREQ（Detection cycle）
Register name: SAMPLEFREQ
Register address: 95(0x5f)
Read/write direction: R/W
Default value: 0x0064
Bit
NAME
FUNCTION
15:2
1:0
SAMPLEFREQ[1:0]
Detection period, whose
reciprocal is the number
of output data per second,
can be set between 1 and
100Hz
Example:
Send: FF AA 69 88 B5 (useful for unlocking within 10S)
FF AA 5F 64 00 (Set detection period to 100Hz)
FF AA 00 00 00 (Save)