China Passenger Car Camera Market Report, 2019Q2 -…

China Passenger Car Camera Market Report, 2019Q2 – ResearchInChina

Toyota Pre-collision System (PCS)

Toyota’s Pre-Collision System (PCS) renders an in-vehicle camera and laser to detect pedestrians and other vehicles in front of the vehicle. If it determines possibility of a frontal collision, the system will prompt the driver to take action and avoid it with audio and visual alerts. If the driver notices the potential collision and apply the brakes, the Pre-Collision System with Pedestrian Detection (PCS w/PD) may apply additional force using Brake Assist (BA). If the driver fails to brake in time, it may automatically apply the brakes to reduce the vehicle’s speed, helping to minimize the likelihood of a frontal collision or reduce its severity.

In some situations (such as the following), a vehicle/pedestrian may not be detected by the radar and camera sensors, thus preventing the system from operating properly.

When an oncoming vehicle approaches
When the preceding vehicle is a motorcycle or a bicycle
When approaching the side or front of a vehicle
If a preceding vehicle has a small rear end, such as an unloaded truck
If a preceding vehicle has a low rear end, such as a low bed trailer
When the preceding vehicle has high ground clearance
When a preceding vehicle is carrying a load which protrudes past its rear bumper  
If a vehicle ahead is irregularly shaped, such as a tractor or sidecar
If the sun or other light is shining directly on the vehicle ahead
If a vehicle cuts in front of your vehicle or emerges from beside a vehicle
If a preceding vehicle ahead makes an abrupt maneuver (such as sudden swerving, acceleration or deceleration)
When a sudden cut-in occurs behind a preceding vehicle  
When a preceding vehicle is not right in front of your vehicle  
When driving in bad weather such as heavy rain, fog, snow or a sandstorm
When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
When driving through steam or smoke
When amount of light changes dramatically, such as at a tunnel exit/entrance
When a very bright light, such as the sun or the headlights of oncoming vehicle, beat down the camera sensor
When driving in low light (dusk, dawn, etc.) or when driving without headlights at night or in a tunnel
After the hybrid system has started and the vehicle has not been driven for a certain period of time
While making a left/right turn and within a few seconds after making a left/right turn
While driving on a curve, and within a few seconds after driving on a curve
If your vehicle is skidding
If the front of the vehicle is raised or lowered
If the wheels are misaligned
If the camera sensor is blocked (by a wiper blade, etc.)
If your vehicle is wobbling
If your vehicle is being driven at extremely high speeds
While driving up or down a slope
When the camera sensor or radar sensor is misaligned

In some situations (such as the following), braking force may be not enough to make PCS work normally:

When braking function fails to work normally due to undercooled, overheated or wet braking parts
When the vehicle is maintained improperly (brake/tires over worn, abnormal tire pressure, etc.)
When the vehicle travels on gravel roads or other slippery roads

PCS should be disabled when radar and camera sensor may not recognize a pedestrian in the following circumstances:

When a pedestrian is 1m or shorter or 2m or taller
When a pedestrian wears oversized clothing (a rain coat, long skirt, etc.), obscuring the pedestrian’s silhouette
When a pedestrian carries large baggage, holds an umbrella, etc., hiding part of the body
When a pedestrian leans forward or squats
When a pedestrian pushes a pram, wheelchair, bicycle or other vehicle
When pedestrians are walking in a group or are close together
When a pedestrian is in white that reflects sunlight and looks extremely bright
When a pedestrian is in the darkness such as at night or while in a tunnel
When a pedestrian has clothing with brightness/color similar to scenery and that blend into the background
When a pedestrian is staying close to or walking alongside a wall, fence, guardrail, vehicle or other obstacle
When a pedestrian is walking on top of metal on the road surface
When a pedestrian walks fast
When a pedestrian abruptly changes walking speed
When a pedestrian runs out from behind a vehicle or a large object
When a pedestrian is very close to a side (external rearview mirror) of the vehicle

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