RF1000-OEM Measuring Distance Mould
General Information：
This RF1000-OEM is an Impulse / pulsed type laser measure distance model. The principle is by using laser emission one single or a bunch of laser burst to the object and receive the echo which back from the object under diffuse reflection and calculate and deal with by the round trip time then the result will be sent to other equipment via serial communication.
System layout / module information
1、Laser Emission Lens
2、Laser Receive Lens
3、Receive Electric Board
4、Emission Electric Board
5、Power and UART Connecter
6、Mother Board
Technical specifications
Range 5-1100 meter
Accuacy +- 1 meter
Measuring speed 0.5-3 Hz low speed
Spectra of laser 905 nm near IR
Lase safety class Class 1 harmless
Beam divergence 3.5 mrad miliradians
Beam diameter 23 mm
Operating voltage 2.4-6 volt DC
Power demand 500 mW
Connection UART / RS 232
Temperature range - 10 C to + 50 C
Dimensions 71x58x33 mm open frame
Weight 100 grams
Operation Instruction:
1.1 The power is DC 3V, the Distance Mould worked in standby state when it powered on.
1.2 Once the Distance Mould received the command of measure distance, it worked in measure state, and the distance result transmited from UART interface. One command can only measure one time.
Communication Protocol：
Communication use interface of UART interface of 8051 MCU. Baud ratio is 9600bps. 8 bit data bits,1 start bit, and 1 stop bit. The data frame is as follows.
STX parameter data（2Bytes） check
SBUF0 SBUF1 SBUF2 SBUF3 SBUF4
The data frame include: a star byte t(STX), a parameter byte, two data bytes, and a check byte..
STX: 02H start byte;
Parameter: 00H no use(reserved)
01H laser range finder measure instruction
10H laser range finder measured distance and the distance is effective
11H laser range finder can’t measure distance
Data: high byte before low byte
Check: the XOR of STX, parameter, and data. Check=SBUF0 XOR SBUF1 XOR SBUTF2 XOR SBUF3.
For example:
To send the instruction of measurement to the laser range finder, you need to send a data frame as follows.
02H, 01H, 00H, 00H, 03H
If the laser range finder measured the distance is 500M, so the laser range finder send back a data frame as follows:
02H, 10H, 01H, F4H, E7H
If the laser range finder can’t measure the distance, than it will send back a data frame as follows:
02H, 11H, 00H, 00H, 13H
