Faselase D20 User manual

Model: D20
2D LiDAR
USER MANUAL
QUICK START
Make sure that the USB driver is installed and plug the USB cable into the PC,
Connect the device to power supply (+5V±10%, 3A),
Run our data acquisition and analysis software,
Then select the correct communication port and set the baud rate to 921600bps.
Press the start button " " and start to work!
(Version V8.01.8)
For more info & supports, please visit http://www.top1sensor.com

Content
1. Specifications .............................................................................................................. 1
2. Dimensional drawing.................................................................................................... 2
2.1 Rendering ........................................................................................................... 2
2.2 Dimensions ......................................................................................................... 2
3. Installation and connection ........................................................................................ 3
3.1 Installation ........................................................................................................ 3
3.2 Connection ........................................................................................................ 3
4. Software setting .......................................................................................................... 4
4.1 Driver installation .............................................................................................. 4
4.2 Data acquisition ............................................................................................... 4
5. Communication protocal ............................................................................................ 6
5.1 Output data format ......................................................................................... 6
5.2 Data check algorithm .................................................................................... 10
5.3 Data analysis algorithm ................................................................................ 10
6. Trouble shooting ....................................................................................................... 12
6.1 Factors affecting the measurement range .................................................... 12
7. Standard and optional accessories .......................................................................... 13
8. Contact us .................................................................................................................. 13

2D Lidar sensor
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1. Specifications
Items
Parameters
Scanning range 1
0.15m~20m, 12m@10%
Measurement error 2
±3cm@20m@10Hz
Scanning angle range
360°
Angle resolution
0.28°
Scanning frequency 3
10Hz
Measurement frequency
14.28Khz
Output Interface
TTL
Distance resolution
1cm
Laser source
Laser diode 905nm, ≤1mW; comply with
GB7247.1-2001
Class 1 Laser Eye Safety Requirements
Power supply
DC 5V±10%, Power consumption ＜3W
Starting current＞1.5A
Volume
78×78×56 mm
Operating temperature range
－10℃~ +50℃
Storage temperature range
－20℃~ +70℃
Protection level
IP54
Weight
190 g
Working life
50,000 hours under standard conditions
Notes:
1. An object with only 10% reflectivity and dark color that can be measured 12m, Kodar white up to 20m.
2. The measurement repeatability accuracy is ±3cm when the measurement range achieves 20m and scanning
frequency is 10Hz.
3. The default rotating speed is 10 revolutions per second

2D Lidar sensor
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2. Dimensional drawing
2.1 Rendering
2.2 Dimensions

2D Lidar sensor
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3. Installation and connection
3.1 Installation
3.2 Connection
3.2.1 Wiring diagram
3.2.2 Definitions of 10pin connection cable
Pin
Function
Color
Notes
0
+5V±10%
Red
DC power supply +5V
1
GND
White
DC power ground
2
Tx
Yellow
Connect to external TTL Rx
3
Rx
Green
Connect to external TTL Tx
4
GND
Black
Connect to internal GND

2D Lidar sensor
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3.2.3 Power supply
The starting voltage needs to be 5V, the starting current needs to be 1500mA, the normal working current
is 500mA. However the ripple coefficient of the power supply should not be more than 40mV. Factory
setting is D10 Lidar automatically rotates and measures after power-on.
4. Software setting
4.1 Driver installation
After USB driver is successfully installed, connect the Lidar to the computer to confirm that it
recognizes the com port, and then turn on the power. If the power is turned on first and then connected,
there is a possibility that the computer mouse will be out of control. Please pay attention to the
operation sequence. Run the "FaseLase LiDAR Point Cloud Data Acquisition and Analysis System.exe’
program " and it can be used normally.
Some PC can automatically install the driver after LiDAR connected, if not, please download the
CP210X driver in our software package.
4.2 Data acquisition
To run ‘FaseLase LiDAR Point Cloud Data Acquisition and Analysis System.exe’ program, the
communication settings window (see figure 1) will popup. First, select device D20. Second, select
serial port number corresponding to the device. In fact, the serial port connected to the computer can
automatically be identified by the program. Third, select baud rate 921600. Fourth, click ‘Yes’ to enter
monitoring interface (see figure2). Baud rate: 921600 bps, Parity bit: None, Data bits: 8, Stop bit: 1
Figure 1: communication settings window
.

2D Lidar sensor
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Figure 2: the monitoring interface
After entering the monitoring window, click the right mouse button in the grid chart, select System
Settings, change the maximum distance from the original 1000 to 2000 in System Settings, and then
click Yes, then start to measure, the measured effect of the monitor window is as Figure 3

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Figure 3:the measured results of the monitor window
Click the save icon to display the number of points detected in the current circle and the distance
and angle of each point.
Click the right mouse button in the monitor interface to select ‘one dimensional display’to observe
the real-time data changes of each circle detection.
Click Save icon , start to record the test data, after setting the name and path, click OK,
The record ends. Click Save button again, click Cancel in the pop-up window to complete the data
recording.
The recorded data can also be opened by clicking the Open History File button
5. Communication protocal
5.1 Output data format
5.1.1 Binary output: 4 bytes, including both distance and angle values.
5.1.2 Each distance test data packet has 4 bytes (labeled A, B, C, and D in sequence.,
each byte has 8 bits, corresponding to A7,A6,...,A1,A0, B7,B6,...,B1,B0, C7,C6,...,C1,C0.and
D7,D10,...,D1,D0.
5.1.3 The MSBs of the first 3 bytes are 0 (A7, B7, C7), and the MSB of the last byte is 1 (D7),
which indicates the end of the data pack. There are 4*7 = 28 bits valid data in each data packet.
A6, A5, A4 of byte A are the check bit. For the specific algorithm, please check the data check
algorithm in the next part.

2D Lidar sensor
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A3, A2, A1, A0, B6, ... B0, C6 are measured distances values (a total of 12 bits), its range is
0~4000cm .
C5...C0, D6,...D0 are measured angle values (a total of 13 digits). Its range is 0~5759, the
angular accuracy is 1/16 degree.
Bits
A7
A6
A5
A4
A3
A2
A1
A0
Value
0
Check
Check
Check
Distance
Distance
Distance
Distance
Bits
B7
B6
B5
B4
B3
B2
B1
B0
Value
0
Distance
Distance
Distance
Distance
Distance
Distance
Distance
Bits
C7
C6
C5
C4
C3
C2
C1
C0
Value
0
Distance
Angle
Angle
Angle
Angle
Angle
Angle
Bits
D7
D10
D5
D4
D3
D2
D1
D0
Value
1
Angle
Angle
Angle
Angle
Angle
Angle
Angle

2D Lidar sensor
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5.2 Data check algorithm
Each character has 8 bits (bit7~bit0), each bit can be 0 or 1. The check bits A6,A5,A4 store the low 3
bit of sum of 1 of B,C,D 3 bytes, when check algorithm, first get the number of ‘1’in the 3 bytes of
B,C,D by looking up the table and then add them up, and then compare the lower 3 bits of the sum with
A6,A5,A4, if they are consistent, output the measurement results
unsigned char GetCrcPackage4Byte (unsigned char *buf)
{.
unsigned char B,C,D;
B = buf[1];
C = buf[2];
D = buf[3];
//cbit is a number table of 1corresponding to 0-255
static unsigned char cbit[256] = {
0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8,
};
return (cbit[B]+cbit[C]+cbit[D])&0x07; } return the low 3 digits the sum of 1 in the 3 bytes of
B,C,.D
5.3 Data analysis algorithm
//buf is a data package pointer, which stores 3 bytes as A, B, C in order.
//return distance value, if data check is not correct, return -1
//
int DecodeLaseData(unsigned char *buf)
{
int distance;
unsigned char crcdata = GetCrcPackage3Byte(buf);

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//unsigned char orgcrc = (buf[0]>>4)&0x07;
if( crcdata!= (buf[0]>>4))
return -1;
;
//calculate the distance. A0,B6..B0,C6...C0
. distance = ((buf[0]&0x1)<<14)+(buf[1]&0x7F)<<7)+((buf[2]&0x7F));
return distance ;
}
//
//buf is a data package pointer, which stores 4 bytes as A, B, C and D in order.
//return the distance value, if data check is not correct, return -1
typedef struct{
int distance;
int Angle;
}FSDNode;
bool DecodeFSD10(FSDNode *nodelist,unsigned char *buf)
{
unsigned char crcdata = GetCrcPackage4Byte(buf);// calculate the low 3 digits the sum of 1 in the 3
bytes of B,C,.D
unsigned char orgcrcdata = (buf[0]>>4)&0x07;//get original check A6,A5，A4
if(orgcrcdata!= crcdata)
return false;
unsigned int distance，angle;
//calculate distance
distance = (buf[0]&0x0F);
distance <<= 7;
distance += (buf[1]&0x7F);
distance <<= 1;

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if( buf[2]&0x40)
distance ++;
nodelist->distance = distance;
//calculate angle
angle = buf[2]&0x3F;
angle <<= 7;
angle += (buf[3]&0x7F);
nodelist->Angle = angle;
return true;
Contact us to get more engineering cases and SDK packages supporting ROS drivers.
6. Trouble shooting
6.1 Factors affecting the measurement range
The D10 is an optical measuring device whose measurement results are affected by environmental
factors. Therefore the actual measuring result might be different with typical value which is
measured in standard environment.
The following factors will effect actual measuring range.
Factors
Affecting result
Multipath reflection
Wrong measurement results may occur when the laser energy
returned from other objects exceeds the energy returned from the
target
Transparent surface
Wrong measurement results may occur when the measurement target
is colorless liquids or glasses
Small object
When the measured object is smaller than the laser spot, or the laser
measures the corner of the measured object, incorrect measurement
results may occur.

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7. Standard and optional accessories
No.
Items
Qty
Remarks
1
D20
1 pc
2
Data cable
1 pc
3
TTL to USB convertor
1 pc
4
DC +5V power adapter
1 pc
Optional
8. Contact us
Xi’an Zhizun International Trade Co.,Ltd
Http://www.top1sensor.com
Tel: [phone]
Fax: [phone]
Mobi: [phone] Mr.Yang
E-mail: [email protected]
Add: No.68 Middle Sector South,Huancheng Road, Xi'an,China