SANKOE SKD-20D Laser Distance Sensor User Manual
- June 17, 2024
- SANKOE
Table of Contents
SKD-20D Laser Distance Sensor
USER MANUAL
Version 3.1
Getting more info & supports from http://www.top1sensor.com
SKD-20D Laser Distance Sensor
Please read the user manual carefully before using our products and avoid looking directly at the laser during operation.
Overviews
SANKOE.LTD is a professional manufacturer from China who provides high
performance laser distance sensor and customized service. Top1senser.com is
our official website for online business.
Laser distance sensor SKD-20D is a new kind of our laser distance measuring
instrument. It is characterized by high accuracy, long detection range, fast
measuring speed and competitive cost. The product has been widely used in many
fields including robot& drones positioning, tunnel & elevator detection and
other industrial applications.
Features
❶ Long detection range (0.2 to 20m)
❷ High measuring accuracy (typical precision: ±2mm)
❸ Fast to install Using 8 screws can be quickly and firmly installed
❹ Easy to operating Automatic measurement by simple commands from computer
❺ Safety in use Laser class 2, harmless to the human body (avoid direct eye
exposure)
❻ Kinds of output type RS232/485/TTL serial data output 4~20mA/0~5V/0~10V
analog current/voltage output Two-way switch output based on thresholds set by
users
❼ Long-life and high reliability with good protection High waterproof and
dustproof performance with aircraft grade aluminum alloy shell (the highest
level is IP67)
❽ Fully customized service based on 15+ years industry experience
Specifications
| Laser Distance Sensor | SKD-20D(RS232) |
|---|---|
| Measuring Range | 0.2m to 20m ① |
| Measuring accuracy | typ:±2mm |
| Smallest unit displayed | 1mm |
| Laser class | 2 |
| Laser type | 635nm,＜1mW |
Laser beam diameter approx.
-at 10m distance
-at 50m distance| 6mm
30mm
Measuring mode
-trigger measuring
-continuous measuring| yes
yes
Operation mode| commands by computer
Output mode| RS232 serial digital output
Power supply| DC 9~24V/1A
Power consumption| ＜3W
Temperature range
-storage
-operating| -25℃ to 70℃
-10℃ to 50℃ ②
Dimension| 110.85040mm ③
Weight| 210g
①Use a target plate to increase the measurement range during daylight or if
the target has poor reflection properties.
②The highest operating temperature is 40℃ when sensor works in continuous
measuring mode. The operating temperature from -30℃to 50℃ or -30℃to 70℃can be
customized
③The details of dimension are shown in the following image.
A: Top view
B: Back view
C: Front view
Using Instructions
4.1 Definitions of connection cable
Red line —— VCC
Black line —— PGND
Yellow line —— TX
Green line —— RX
White line —— Signal GND
4.2 Operating Steps
4.2.1 Connect sensor to a serial port of computer (or other device which has
serial ports), then connect to a power port of adapter with special data
cable.
4.2.2 Single Measuring Mode
4.2.2.1 Send a command “O” (ASCII) by computer to turn on the sensor.
Then sensor will emit a laser beam and prepare for working, and return the
data “ – – – ” (ASCII) to the serial interface.
4.2.2.2 Send a command “O” (ASCII) again to the sensor to start to measure
distance. The sensor will return the measured data like “ XXXXX” (ASCII) to
the serial interface and turn off laser beam when it finished a single
measurement.
4.2.2.3 Send a command “U” (ASCII) to turn off the sensor.
4.2.3 Continuous Measuring Mode
4.2.3.1 Send a command “O” (ASCII) by computer to turn on the sensor. Then the
sensor will turn on the laser and prepare for working, return the data “ – –
-” (ASCII)to the serial interface.
4.2.3.2 Send a command “C” (ASCII) to the sensor. The sensor will begin to
measure continuously after 2 seconds when it got the order, and return the
data continuously like “ XXXXX” (ASCII).
If the sensor couldn’t get any available data, it will return “ – – -” to the
serial interface.
4.2.3.3 Send a command “U” (ASCII) to turn off the whole sensor (include both
of laser unit and measuring unit).
Inputs and Outputs
5.1 Communication Setting
Baud rate: 9600 bps, Parity bit: None, Data bits: 8, Stop bit:1
5.2 Input data format
There is only one byte in each input data pack. Users could send different
commands to the sensor for different purpose, the functions of command are
shown in the following table.
| HEX | 0X4F | 0X43 | 0X55 |
|---|---|---|---|
| ASCII(Capital letter) | O | C | U |
| Functions of command | Power On & Trigger Measuring | Continuous Measuring |
Power Off
5.3 Output data format
Digital output data is displayed by ASCII code, there is 7 bytes in every data
frame.
The frame header is 0XFF, the next bytes meant measured distance numbers
(unit: mm). A: hundreds of thousands, B: tens of thousands, C: thousands, D:
hundreds, E: tens, F: ones.(Notice: If any byte in a data frame is not used,
the sensor will return 0X20 in that byte.)
| Header | A | B | C | D | E | F |
|---|---|---|---|---|---|---|
| 0XFF | hundreds of | |||||
| thousands | tens of | |||||
| thousands | thousands | hundreds | tens | ones |
The mapping table of HEX and number codes:
| HEX | 0X30 | 0X31 | 0X32 | 0X33 | 0X34 | 。。。 | 0X37 | 0X38 | 0X39 | 0x2D | 0X20 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| number | 0 | 1 | 2 | 3 | 4 | 。。。 | 7 | 8 | 9 | – | space |
For example, if the measured distance data is 3456mm, then the sensor
willreturn data as” 3456″(HEX: FF 20 20 33 34 35 36).
Or the measured distance data is 123456mm, then the sensor will return data as
“123456”(HEX: FF 31 32 33 34 35 36).
If the sensor couldn’t get any available data( out of measurement range or
measured in blind zone), it will return “ – – – -”(HEX:FF 20 2D 2D 2D 2D 20)
to the computer.
Troubleshooting
6.1 Factors affecting the measurement range
Laser distance sensor is a new of non-contact optical measuring equipment. Its
measuring range and accuracy will be effect by many external environmental
factors. So actual measuring result might be different with typical value
which is measured in standard environment.
The following factors will effect actual measuring range:
Effect Factors| Increase measuring range| Decrease measuring
range
---|---|---
Surface of target| Bright and smooth surface with good reflection, like target
plate| Deep color and rough surface, like green or blue target surface
Air visibility| Clean air| Dust, fog, storm and rain, snow
Ambient light| Dark environment| Target exposure to strong light, like
sunlight in midday
Laser emission| Laser emission lens and protection glass keep clean and
smooth| Laser emission lens and protection glass get dirty or scratched
In conclusion, the best measuring result will be happen in a dark environment
and with a good reflection target. We strongly suggest to use a target plate
when laser distance sensor works in a poor environment.
We also suggest to keep laser emission lens and protection glass clean with a
soft cloth before start to using.
6.2 Error code display
All of error codes are displayed as “E 2XX”(HEX: FF 45 20 XX XX XX).
The following errors can be corrected.
| Display Notice | Cause | Correction |
|---|---|---|
| E 204(FF 4520 32 30 34) | Calculation error | Repeat procedure |
| E 252(FF 4520 32 3532) | Temperature too high | Let device cool down |
| E 253(FF 4520 32 3533) | Temperature too low | Warm device up |
| E 255(FF 4520 32 3535) | Received signal too weak, time for a measurement too | |
| long. | Use a target plate | |
| E 256(FF 4520 32 3536) | Received signal too strong | Use target plate(gray |
side)
E 257(FF 4520 32 3537)| Faulty measurement, too much background light| Use
target plate(brown side)
E 258(FF 4520 32 3538)| Outside of the range of measurement| Select
measurement distance within the range of measurement
E 260(FF 4520 32 3630)| Laser beam interrupted| Repeat the measurement
Contact Us
Xi’an Zhizun International Trade Co., LTD
Xi’an SANK Optical Electronic CO., LTD.
Tel: +86-29-87858956 +86-29-82252810
Mobi: 86-15353715490 Mr. Yang
E-mail: contact@top1sensor.com
Add: No.299, Jinhua North Road, Xi’an, China
Getting more info & supports from http://www.top1sensor.com