CAMERA MONITORING SYSTEM INCLUDING JACKKNIFE WARNING FEATURES
A camera monitoring system (CMS) for a vehicle includes a camera mounted to a tractor and configured to record images that depict a trailer attached to the tractor, an electronic display configured to display the images, and a CMS controller. The CMS controller is operatively connected to the camera and electronic display and is configured to determine whether a trailer angle of the trailer exceeds a jackknife warning threshold based on a depiction of the trailer in the images; and based on a particular one of the images indicating a trailer angle above the jackknife warning threshold, provide a jackknife warning. A method for preventing jackknifing between a vehicle and a trailer is also disclosed.
1 . A camera monitoring system (CMS) for a vehicle comprising:
a camera mounted to a tractor and configured to record images that depict a trailer attached to the tractor;
an electronic display configured to display the images; and
a CMS controller operatively connected to the camera and electronic display and configured to:
determine whether a trailer angle of the trailer exceeds a jackknife warning threshold based on a depiction of the trailer in the images; and
based on a particular one of the images indicating a trailer angle above the jackknife warning threshold, provide a jackknife warning.
2 . The CMS of claim 1 , wherein the CMS controller is configured to determine that a trailer angle of the trailer exceeds the jackknife warning threshold based on a percentage of the particular one of the images that depicts the trailer exceeding a predefined threshold.
3 . The CMS of claim 1 , wherein the CMS controller is configured to determine that a trailer angle of the trailer exceeds the jackknife warning threshold based on a distance between predefined reference position of the trailer and a predefined image location in a particular one of the images crossing a threshold.
4 . The CMS of claim 3 , wherein the predefined reference position of the trailer is a rear vertical edge of the trailer.
5 . The CMS of claim 3 , wherein the predefined reference position is an intermediate location on a side of the trailer between ends of the trailer.
6 . The CMS of claim 1 , wherein the images depict at least one of a Class II view and a Class IV view.
7 . The CMS of claim 1 , wherein the warning includes a proposed corrective steering direction.
8 . The CMS of claim 1 , wherein the warning includes an indication of a severity of a risk of a jackknife condition occurring.
9 . The CMS of claim 1 , wherein the warning is an audible warning.
10 . A camera monitoring system (CMS) for a vehicle comprising:
a camera configured to record images that depict a trailer attached to the vehicle;
an electronic display configured to display the images; and
a CMS controller operatively connected to the camera and electronic display and configured to, based on occurrence of at least one trigger condition:
determine that a trailer angle of the trailer exceeds a jackknife warning threshold; and
provide a jackknife warning;
wherein the at least one trigger condition includes at least one of:
a percentage of a particular one of the images that depicts the trailer exceeding a first threshold; and
a distance between predefined reference position of the trailer and a predefined image location in the particular one of the images crossing a second threshold.
11 . A method for preventing jackknifing between a vehicle and a trailer, comprising:
using a camera mounted to a tractor to record images that depict a trailer attached to the tractor;
displaying the images on an electronic display;
determining whether a trailer angle of the trailer exceeds a jackknife warning threshold based on a depiction of the trailer in the images; and
based on a particular one of the images indicating a trailer angle above the jackknife warning threshold, provide a jackknife warning.
12 . The method of claim 11 , wherein said determining comprises determining that the trailer angle exceeds the jackknife warning threshold based on a percentage of the particular one of the images that depicts the trailer exceeding a predefined threshold.
13 . The method of claim 11 , wherein said determining comprises determining that the trailer angle exceeds the jackknife warning threshold based on a distance between a predefined reference position of the trailer in the particular one of the images and a predefined image location crossing a predefined threshold.
14 . The method of claim 11 , wherein the predefined reference position of the trailer is a rear vertical edge of the trailer.
15 . The method of claim 11 , wherein the predefined reference position is a marker on the trailer.
16 . The method of claim 12 , wherein the images depict at least one of a Class II view and a Class IV view.
17 . The method of claim 12 , wherein the warning is provided on the electronic display.
18 . The method of claim 12 , wherein said providing the jackknife warning comprises indicating a proposed corrective steering direction to a driver of the vehicle.
19 . The method of claim 18 , wherein said providing the jackknife warning comprises providing an indication of a severity of a risk of the jackknife condition occurring.
20 . The method of claim 12 , wherein said providing the jackknife warning comprises providing an audible warning.