Vehicle trajectory extraction method and device based on distributed optical fiber sensing system
A technology of distributed optical fiber and sensing system, applied in the field of intelligent transportation, can solve the problems of large influence of environmental factors, difficult construction, and poor migration application.
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Embodiment 1
[0071] In this embodiment, a section of expressway buried with communication optical fibers is taken as the research object, and the vehicle track extraction method based on the distributed optical fiber sensing system provided by the present invention is explained in detail. like figure 1 As shown, the communication optical fiber is buried underground in the green belt in the middle of the lanes on both sides of the expressway.
[0072] The vehicle trajectory extraction method based on the distributed optical fiber sensing system provided by this embodiment is as follows: figure 2 shown, including the following steps:
[0073] S1 uses a distributed optical fiber sensing system to measure the vibration signal generated by the vehicle's driving section in real time through optical fiber.
[0074] In this embodiment, the idle communication fiber core in the communication optical fiber laid underground in the highway is used as the optical fiber to be tested for monitoring. Th...
Embodiment 2
[0151] This embodiment provides a vehicle trajectory extraction device based on a distributed optical fiber sensing system, such as Figure 9 shown, which includes:
[0152] Distributed optical fiber sensing system for real-time measurement of vibration signals generated by vehicles on road sections through optical fibers;
[0153] The denoising module is used to perform denoising processing on the measured vibration signal by wavelet transform;
[0154] The signal enhancement module is used to perform signal enhancement processing on the denoised vibration signal by using the S transform to obtain the space-time two-dimensional vibration energy response caused by the vehicle running;
[0155] The vehicle track extraction module is used to separate the obtained space-time two-dimensional vibration energy response signal by Radon transform to obtain the vehicle track and the vehicle speed.
[0156] The above-mentioned denoising module, signal enhancement module, and vehicle t...
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