[HN Gopher] Bike-mounted sensor could boost the mapping of safe ...
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       Bike-mounted sensor could boost the mapping of safe cycling routes
        
       Author : yunusabd
       Score  : 8 points
       Date   : 2025-05-14 11:27 UTC (3 days ago)
        
 (HTM) web link (newatlas.com)
 (TXT) w3m dump (newatlas.com)
        
       | yunusabd wrote:
       | I was curious if the sensor would pick up other things like trees
       | or other cyclist, but it seems like they accounted for that:
       | 
       | > We then log a sensor events [sic] if the majority of cells in
       | the sensor frame agree to the same value within a threshold
       | parameter [...]. This ensures that sensor events are only logged
       | when large objects like cars block the sensor's field-of-view ,
       | i.e., one or more small objects like branches or distance
       | pedestrians in the sensor's field-of-view will not trigger this
       | condition. While there is no guarantee that this approach
       | strictly identifies cars, we empirically saw during testing that
       | passing cyclists and pedestrians rarely satisfied this condition
       | at the typical passing distance due to the wide field-of-view of
       | the VL53L8.
       | 
       | Also interesting that it's quite cheap to build:
       | 
       | > The whole system can cost less than $25 [...]
       | 
       | From the paper https://dl.acm.org/doi/10.1145/3706598.3713325
        
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       (page generated 2025-05-17 23:00 UTC)