2mrad 2km Laser Rangefinder module for Anti drone ststem

The compact STA-WR2000X Laser rangefinder module is highly suitable for integration into the air defense systems of the army and navy. The distance measurement module adopts the most advanced diode pumped erbium glass laser, which has high availability and low maintenance cost. Its 2mrad divergence angle can measure UAVs with a cross-section of 0.1 ㎡ up to 2000 meters, making it an important component of anti drone systems.

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Product Description

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

Optical index
Wavelength	1535nm±5nm
Laser divergence Angle	≤2mrad
Effective receiving aperture	56mm
Range frequency	Single, 1~10Hz adjustable
Range	Visibility ≥ 12km, target reflectivity ≥ 0.3, humidity ≤ 80%, UAV ranging distance (0.25m × 0.25m) ≥ 2km
Ranging accuracy	≤±1m（RMS）
Accuracy measurement	≥98%
False alarm rate	≤1%
Minimum measurement range	≤50m
Laser axis stability	≤0.05mrad
The optical axis is parallel to the installation reference	≤0.3mrad
Mechanical indicators
Size	≤90×63×82mm
Weight	≤300g
Electrical indicators
Supply electricity	DC9V～32V
Power dissipation	Work less than 3W@10Hz, peak power consumption less than 5W
Interface	RS422 interface, 115200bps
Power on control interface	When the safe distance is reached, power on and use it; or in low power mode to control its working state
Protection of circuit board	After the design and debugging of the circuit board is completed, it is required to coat the anti-shock paint and do the "three protection" treatment
Environmental suitability
Working temperature	－40℃-65℃
Storage temperature	－55℃-70℃
Vibrate	GJB150.16 A-2009 "Military Equipment Laboratory Environmental Test Methods-Vibration Test"
Lash	GJB150.18 A-2009 "Military Equipment Laboratory Environmental Test Method-Impact Test"

Note:
1.Ranging range description: the range will change under different test conditions and test targets, if you detect special targets, please contact the sales side to confirm;
2.Minimum range: 30m-100m fluctuations, it is recommended to 50m after normal use; due to the laser energy is large, close range use may burn the detector chip, so in the debugging, please bring a good mirror cover to prevent the detector chip is burned.

Mechanical structure diagram

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

OEM/ODM 1-15km Laser Ranging Module for Counter Unmanned Aerial Systems (C-UAS)

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;