Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:1:p28
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 1 (pt 28/34)
Character Range: 211960–215215

threshold increasing factor, which is equal to 8

               ωc:  smallest discernable detail [arcmin]

              1.3.2. Detection distance greater than the critical viewing distance. Where, due to the installation, the distance eye-monitor is more than the critical viewing distance, the maximum obtainable detection distance is defined as:

                [m]

               Where:

                  rdfar: detection distance for distances larger than the critical viewing distance [m]

                  rdclose:  detection distance for distances smaller than the critical viewing distance [m]

               rm: viewing distance, i.e. distance between eye and monitor [m]

                rmcrit: critical viewing distance [m]

              2. Secondary functional requirements

               Based on the installation conditions, a determination shall be made to discover whether the entire device can still satisfy the functional requirements listed in paragraph 6.2.2. of this Regulation, specifically the glare correction, the maximum and the minimum luminance of the monitor. It shall also be determined the degree to which the glare correction will be addressed and the angle at which sunlight can strike a monitor and these shall be compared to the corresponding measuring results from the system measurements. This can be either based on a CAD-generated model, a determination of the angles of light for the device when mounted on the relevant vehicle, or by carrying out relevant measurements on the relevant vehicle as described in paragraph 6.2.2.2. of this Regulation.

Annex 11
 Determination of the displayed object size for CMS of
Classes V and VI
              1. Camera monitor device for indirect vision

              1.1. General

              Determination of the displayed object size considers the possible appearance of smear. The impact on the monitors image and consequence is the occultation of the field of view and therefore of the object. The following differentiation is made:

       1.2.  Case A: Smear appears

              1.2.1.  Step 1: Under the condition described in paragraph 6.2.2.2.1.2. of this Regulation, measure the width (s) of the vertical bar displayed on the monitor e.g. with a measurement microscope.

              1.2.2.  Step 2: Place the object at a defined distance from the camera. Measure the width of the object displayed on the monitor (b) in a situation without real sun light condition e.g. with a measurement microscope.

              1.2.3.  Step 3: Calculate the residual object width () according to the following equation:

                     Where:

                  : residual width of the object displayed on the monitor (with smear) [minutes of arc]

                  b: width of the object displayed on the monitor (without smear) [mm]

                  s: width of the smear [mm]

                  r: viewing distance [mm]

       1.3.  Case B: Smear does not appear

              1.3.1.  Step 1: Place the object at a defined distance from the camera. Measure the width of the object displayed on the monitor (b) in a situation without real sun light condition e.g. with a measurement microscope.

              1.3.2. Step 2: Calculate the object