Velodyne VLS128-T Alpha Prime LiDAR Unit

Module Feature

VLS128-T is Velodyne Alpha Prime high‑end mechanical spinning LiDAR. It integrates 128 independent laser transmit and receive channels, realizing dense 3D point cloud scanning.

The sensor supports single return and dual return working mode, can capture object contour and secondary reflection information. It adopts 905nm infrared laser, built‑in temperature compensation circuit. Point cloud data, reflectivity value, timestamp and diagnostic status are transmitted through Gigabit Ethernet. Widely used for autonomous driving vehicle, mobile mapping, robot obstacle avoidance and highway traffic perception.

Working principle

Laser diodes emit pulsed laser outward, laser reflects back after hitting target object. Avalanche photodiode receives echo signal and calculates flight time to get target distance.

The internal motor drives the optical assembly to rotate 360°, combining horizontal rotation angle and vertical channel angle to generate three‑dimensional coordinate point cloud. The FPGA chip packages point cloud data and uploads to upper perception host for target detection, segmentation and mapping calculation.

Onboard components

128 groups of laser transceiver assemblies, rotating motor, encoder, FPGA data processing board, Gigabit Ethernet PHY chip, power management module, optical window, metal housing.

LED indicators

Side LEDs indicate power ready, Ethernet link, data output and system fault status.

Hardware self‑diagnosis

Self-check covers laser power anomaly, motor speed deviation, Ethernet link loss, temperature overrun and internal communication error. Fault codes can be read in point cloud packet or configuration software.

Programming software

Velodyne VeloView for point cloud visualization, parameter configuration, return mode switching and firmware upgrade.

Electrical & Process Parameters

Model:VLS128-T Brand:Velodyne Device type:128‑Channel Mechanical Spinning LiDAR Laser wavelength:905nm FOV:Horizontal 360°, Vertical -25° ~ +15° Max range:300m @10% reflectivity Frame rate:5~20Hz adjustable Communication:Gigabit Ethernet Supply voltage:9~32V DC Function:3D point cloud acquisition, distance measurement and environment perception

Mechanical & Structure

Mounting:Top or side bracket mounting Protection class:IP67 Housing:Alloy metal sealed housing

Environmental

Operating temperature:-20℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE, FCC compliant Status:Velodyne original LiDAR spare, discontinued model

Installation

Fix LiDAR on vibration‑damping bracket, keep optical window away from shelter. Connect 9~32V DC power and Gigabit network cable.

Set frame rate and return mode in VeloView. Avoid strong direct sunlight and corrosive spray. Clean optical window regularly with special lens cloth.

Interface

Power supply terminals, Gigabit Ethernet connector, multi‑pin signal connector.

Diagnostic

No point cloud output: Network cable fault, IP mismatch, power undervoltage or laser module failure.

Point cloud missing / weak echo: Optical window fouled, laser aging.

Abnormal rotation noise: Motor bearing wear or foreign matter entering housing.

Product BriefVelodyne VLS128-T Alpha Prime 128-line spinning LiDAR, 360° scanning, 300m long range, Gigabit Ethernet point cloud output, used for autonomous vehicle, mapping and industrial environment perception.