5km Eye-safe Laser Rangefinder Module(LRF)

STA-B50X is a human eye-safe laser distance measurement module, which can detect the target distance and transmit the measured distance to the upper computer through serial communication. Visibility ≥ 12km, target reflectivity ≥ 0.3, humidity ≤ 80%, the vehicle (2.3m × 2.3m NATO target) ranging distance ≥5km.

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Product Description

Main functions

(1) Single ranging and continuous ranging;
(2) Responding to laser ranging commands, and can stop ranging at any time according to the stop command;
(3) Output distance data and status information once per pulse during distance measurement;
(4) It can report the cumulative number of transmitted laser pulses (no loss of power down);
(5) Distance selection, front and rear target indication;
(6) Self-test function.

Product performance index

Item	Technical parameter	Instruction
Model	STA-B50X
Working wavelength	1535±5nm
Eye safety	Class 1 (IEC 60825-1)
Receiving Aperture	Φ25mm
Emission aperture	Φ10mm
Ranging capability	30-8000m
Ranging range	≥10000m	MAX Range, Reflectivity: 0.9, observer visibility 25km
	≥7000m	Large Building targets, Reflectivity: 0.6, observer visibility 20 km
	≥5000m	NATO target
	≥3000m	Human target
	≥1500m	UAV target
Mini Range	30m
Multi-target detection	Up to 3 target
Range resolution	30m
Ranging accuracy	±1m
Ranging frequency	1~10Hz adjustable
Accuracy rate	≥98%
False alarm rate	1%
Divergence angle	≤0.5mrad
Communication Interface	RS422	TTL/RS232 Interface can be customised
Voltage	DC9~32V
Power consumption	≤1.2W(@1hz)	Working power
	≤5W@12V	Peak power
	0.1W	Standby power (Connect POWER-ON)
Laser optical axis stability	≤0.05mrad
Parallel error	≤0.3mrad	Parallelism error of optical axis to mounting reference
Mechanical Shock	75g, 1ms
Working temperature	-40℃～+70℃
Storage temperature	-55℃～+75℃
Reliability	MTBF ≥ 1500h
Size	≤50x32x43.5mm
Weight	≤75g
Main Function		First and last target ranging, Multi-target ranging, Distance selectivity

Notes:

1) NATO target size 2.3 m × 2.3 m; Human target size 0.5 m × 1.7 m; UAV target size 0.2 m × 0.3 m; Reflectivity 30%, Humidity≤80%,observer visibility≥ 12km

Structure installation interface

External Interface

Pin	Definition	Function	Notes
1	RX+	RS422 Receiver +	Blue
2	RX-	RS422 Receiver -	Green
3	TX-	RS422 Transmission -	Purple
4	TX+	RS422 Transmission +	Yellow
5	GND	Communication ground wire	White
6	VEE	Power supply +	Red
7	GND	Power supply -	Black
8	PWR EN	/	Ash

External Interface

OEM/ODM ranging modules and custom solutions

The B50X is designed for system integrators looking for a convenient, powerful and compact laser ranging solution. It provides reliable performance in a wide range of applications.

It is very small, ultra-light, has low power consumption and can be measured over a long distance. It is suitable for handheld devices (thermal imaging), weapon mounting applications, portable systems and lightweight sensor suites and unmanned aerial vehicles or UGVs.

Communicating protocol

1. Transmission protocol: asynchronous serial communication;
2. Port rate: 115200;
3. Data bits: 10bits: one start bit, 8 data bits, one stop bit, invalid verification;
4. Data structure: The data consists of the header byte, command part, data length, parameter part and check byte;
5. Communication mode: the master control sends control commands to the ranging machine, and the ranging machine receives and executes the instructions. In the ranging state, the ranging machine sends data and status of the ranging machine back to the upper computer according to the ranging cycle. The communication format and command content are shown in the following table.

A) Main control sends
The format of the message to be sent is as follows:

STX0

CMD

LEN

DATA1H

DATA1L

CHK

Table 2 Format description of the message sent

order number	name	explain	code	remarks
1	STX0	Message start flag	A5(H)
2	CMD	CW	See table 3
3	LEN	DL	The number of all bytes except the start mark, command word, and checksum
4	DATAH	parameter	See table 3
5	DATAL	parameter	See table 3
6	CHK	XOR verification	Except for the valid byte, all other bytes are XORed

The command is described as follows:
Table 3 Description of commands and data words sent by the master to the ranging machine

order number	CW	function	data byte	remarks	length	Example code
1	0x00	cease	DATAH=00（H）DATAL=00（H）	The rangefinder stops measuring	Six bytes	A5 00 02 00 00 A7
2	0x01	Single ranging	DATAH=00（H）DATAL=00（H）		Six bytes	A5 01 02 00 00 A6
3	0x02	Continuous ranging	DATAH=XX（H）DATAL=YY（H）	DATA describes the ranging period, in ms	Six bytes	A5 02 02 03 E8 4E (1Hz ranging)
4	0x03	self-checking	DATAH=00（H）DATAL=00（H）		Six bytes	A5 03 02 00 00 A4
5	0x04	Set the closest distance to the selection	DATAH=XX（H）DATAL=YY（H）	DATA describes the blind zone value, unit 1m	Six bytes	A5 04 02 00 64 C7(100m is the closest distance)
6	0x06	Cumulative number of light output queries	DATAH=00（H）DATAL=00（H）	Cumulative number of light output queries	Six bytes	A5 06 02 00 00 A1
7	0x11	APD power is on	DATAH=00（H）DATAL=00（H）		Six bytes	A5 11 02 00 00 B6
8	0x12	APD power is off	DATAH=00（H）DATAL=00（H）		Six bytes	A5 12 02 00 00 B5
9	0xEB	Number query	DATAH=00（H）DATAL=00（H）	Number query	Six bytes	A5 EB 02 00 00 4C

a)Main control receives format
The format of the received message is as follows:

STX0

CMD

LEN

DATAn

DATA0

CHK

Table 4 Format description of received messages

order number	name	explain	code	remarks
1	STX0	Message start flag 1	A5 (H)
2	CMD_JG	Data command word	See table 5
3	LEN	DL	The number of all bytes except the start mark, command word, and checksum
4	Dn	parameter	See table 5
5	D0	parameter	See table 5
6	CHK	XOR verification	Except for the valid byte, all other bytes are XORed

Main control receiving status description:
Table 5 describes the data word sent by the rangefinder to the master controller

order number	CW	function	data byte	remarks	overall length
1	0x00	cease	D1=00（H）D0=00（H）		Six bytes
2	0x03	self-checking	D8 ~D1	D8-D7: -5V voltage, unit 0.01V.D6-D5: Blind spot value, unit 1mD4: APD high voltage value, unit V;D3: char type, indicating APD temperature, unit: degrees Celsius;D2-D1: +5V voltage, unit 0.01V	12 bytes
3	0x04	Distance to the nearest access setting, unit m	D1 D0	DATA describes the nearest distance value, unit 1m;Start high and end low	Six bytes
4	0x06	Cumulative number of light output queries	D3~D0	DATA expresses the number of lights, 4 bytes, with the high byte first	Seven bytes
5	0x11	APD power is on	D1=00（H）D0=00（H）	APD power is on	Six bytes
6	0x12	APD power off	D1=00（H）D0=00（H）	APD power is off	Six bytes
7	0xED	Working overtime	0x00 0x00	The laser is under laser working protection and cannot be measured.	Six bytes
8	0xEE	Effectiveness errors	0x00 0x00		Six bytes
9	0XEF	Serial port communication timeout	0x00 0x00		Six bytes
10	0x01	Single range measurement (single target, zero for the second and third targets, zero for the third target at the beginning and end of the target)	D9D8 D7 D6D5 D4 D3D2 D1 D0	D8-D6 first target distance (unit 0.1m)D5-D3 distance to the second target (unit: 0.1m)D2-D0 third target distance (unit 0.1m)3. Goals are from near to farD9 (bit7-bit0) flag byte:D9 is the 7th position indicating the main wave; 1: there is a main wave, 0: no main wave.D9 is the 6th position indicating echo; 1: there is echo, 0: no echoD9 The fifth position indicates the laser status; 1: normal laser, 0: laser faultD9 is the fourth bit of the timeout flag, 1: normal, 0: timeoutD9 is invalid at the 3rd position (set to 1);D9 The second position indicates the APD status; 1: normal, 0: errorD9 is the first position to indicate whether there is a previous target; 1: there is a previous target, 0: no previous target (target in the blind area).D9 The 0th bit indicates whether there is a subsequent target; 1: there is a subsequent target, 0: no subsequent target (the target after the main target is the subsequent target)	14 bytes
11	0x02	Continuous ranging (single target, zero for the second and third targets, zero for the third target at the beginning and end of the target)	D9 D8 D7 D6D5 D4 D3D2 D1 D0	D8-D6 first target distance (unit 0.1m)D5-D3 distance to the second target (unit: 0.1m)D2-D0 third target distance (unit 0.1m)3. Goals are from near to farD9 (bit7-bit0) flag byte:D9 is the 7th bit to indicate the main wave; 1: there is a main wave, 0: no main wave.D9 is the 6th position indicating echo; 1: there is echo, 0: no echoD9 The fifth position indicates the laser status; 1: normal laser, 0: laser faultD9 is the fourth bit of the timeout flag, 1: normal, 0: timeoutD9 is invalid at the 3rd position (set to 1);D9 The second position indicates the APD state; 1: normal, 0: errorD9 is the first position to indicate whether there is a previous target; 1: there is a previous target, 0: no previous target (target in the blind area).D9 The 0th bit indicates whether there is a subsequent target; 1: there is a subsequent target, 0: no subsequent target (the target after the main target is the subsequent target)	14 bytes
12	0xEB	Number query	D17…… D0	D17 D16 D15 D14 D13 D12 Whole machine model codeD11D10 Product numberD9 D6 software versionD5 D4 APD numberD3 D2 Laser numberVersion D1 of FPGA	22 bytes
Note: ① Undefined data byte/bit, default is 0;