ISO 15623:2013 pdf download.Intelligent transport systems -Forward vehicle collision warning systems – Performance requirements and test procedures.
ISO 15623 specifies performance requirements and test procedures for systems capable of warning the driver of a potential rear-end collision with other vehicles ahead of the subject vehicle while it is operating at ordinary speed. The FVCWS operate in specified subject vehicle speed range, road curvature range and target vehicle types. This International Standard covers operations on roads with curve radii over 125 m, and motor vehicle including cars, trucks, buses, and motorcycles. Responsibility for the safe operation of the vehicle remains with the driver.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 825-1:1993, Safety of laser products — Part 1: Equipment classification, requirements and user’s guide (includes update of 1994)
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
collision warning
information that the system gives to the driver indicating the need for urgent action to avoid or reduce the severity of a potential rear end collision with another forward vehicle
Note 1 to entry: This warning is issued in the advanced stages of a dangerous situation to warn the driver of the need to perform emergency braking, lane changing or other emergency manoeuvres in order to avoid a collision.
3.2
reflection coefficient of test target
RCTT
optical radar reflectivity of the target, which is defined as the radiated intensity towards the receiver (Iref
– W/sr) measured at target level, immediately after the reflection; divided by the intensity of irradiation received from the transmitter (Et – W/m2) measured at target level, immediately before the reflection
Note 1 to entry: The units for RCTT value are in m2/sr (see Annex C).
3.3
forward vehicle
vehicle in front of and moving in the same direction and travelling on the same roadway as the subject vehicle
3.4
forward vehicle collision warning system
FVCWS
system capable of warning the driver of a potential collision with another forward vehicle in the forward path of the subject vehicle
3.5
obstacle vehicles
vehicles, both moving and stationary, considered potential hazards that can be detected by this system
EXAMPLE Motor vehicles only, that is cars, trucks, buses, and motorcycles.
3.6
preliminary collision warning
information that the system gives to the driver in the early stages of a potentially dangerous situation that may result in a rear end collision.
Note Ito entry: The system may provide this warning prior to the collision warning.
3.7
radar cross section
RCS
measure of the reflective strength of a radar target measured in square meters, and defined as 4rr times the ratio of the power per unit solid angle scattered in a specified direction to the power per unit area in a radio wave incident on the scatterer from a specified direction.ISO 15623 pdf download.