Ladar scene projector for a hardware-in-the-loop simulation system

Xu, Rui; Wang, Xin; Tian, Yan; Li, Zhuo

doi:10.1364/ao.55.005745

Cited by 6 publications

(2 citation statements)

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“…where I ds is the intensity of the delay-slice signal given by (7), A DOF = 64 is the number of time delay slices of the DOF LiDAR scene model, I 0 is the intensity of the original transmitted laser pulse, γ is the transmittance of the multiplexed delay channel. The theoretical time delay of the kth delay fiber is: where τ is the time delay resolution:…”

Section: A Multiplexed Delay Channelmentioning

confidence: 99%

“…However, the cost of the electronic time delay system will become extremely high when the sensor array size of the LiDAR under test becomes large. In a previous paper from our team [7], a LiDAR scene generator with a time delay resolution of 10 ns and 108 time delay channels was developed using electronic time delay modules provided by National Instruments (NI, USA). Its electronic time delay system consists of a controller module (Pxie-8135), a timing and synchronization module (Pxie-6674T), two FPGA modules (Pxie-7972R), two IO adapter modules (Pxie-6581B), and a chassis (Pxie-1082).…”

Section: Introductionmentioning

confidence: 99%

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A Programmable All-Optical Delay Array for Light Detection and Ranging Scene Generation

et al. 2019

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Light detection and ranging (LiDAR) scene generator is an important device in the LiDAR guidance hardware-in-the-loop (HWIL) simulation system. It generates simulated optical LiDAR scenes under laboratory conditions. A simulated LiDAR scene consists of an array of laser return signals with different intensities and time delays. The intensity of a return signal is determined by the target albedo and the target distance. The time delay of a return signal is determined by the target distance. A time delay array system is crucial for the LiDAR scene generation. In this paper, a programmable all-optical delay array system using an optical true-time-delay (OTTD) method is proposed. It can generate laser return signals with large-signal array size, long delay range, and high delay resolution. The signal array size of the generated LiDAR scene is 32 × 32. The depth of field (DOF) of the LiDAR scene is 19.2 m, which can be placed at different distances from 5.1 to 2481.6 m. The distance resolution is 0.3 m. The all-optical delay array system can also be extended to support tests of the LiDAR guidance systems with larger sensor arrays.

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Section: A Multiplexed Delay Channelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%