Windshield Sensor Placement Using Driver View Exclusion Geometry
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Solution Overview
Problem
Existing methods for determining the prohibited installation area of sensors, such as photo or video cameras, on commercial vehicle windshields to prevent driver obstruction are time-consuming and require significant space, making them impractical for workshops with limited space.
Innovation Solution
A method involving measuring the distance between the vehicle operator's seat and the windshield at specific points, using a calculation algorithm to determine the coordinates of a rectangular installation prohibition area, allowing for simple and efficient marking of the prohibited area without extensive space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traditional method of creating road markings (semicircle with radius of 12m) is used to determine the prohibited installation area, then the driver's view can be checked according to regulations, but the method requires significant space and time, making it impractical for workshops with limited space
Solution Approach 1:
The invention extracts the essential measurement parameters (distance from seat surface to ground, distance from backrest to windshield) from the complex road marking procedure. By taking out only the critical measurements that can be performed in a workshop setting, the method eliminates the need for large outdoor spaces while maintaining the reliability of driver's view verification.
Solution Approach 2:
The invention creates a simplified computational model that copies the essential geometry of the driver's view verification. Instead of physically creating the semicircle road marking, the method uses calculated coordinates (H_L, V_L) that replicate the verification result, allowing the same safety check to be performed in a confined workshop space.
2Reliability
If the traditional method of creating road markings is used to determine the prohibited installation area, then the driver's view can be checked according to regulations, but the time required to create such road markings is very large
Solution Approach 1:
The invention replaces the mechanical process of creating physical road markings with a computational calculation algorithm. Instead of manually measuring and marking a semicircle on the road, the method uses measured distances (H_s, W_s) as inputs to calculate the prohibited area coordinates (H_L, V_L), dramatically reducing the time required while maintaining verification reliability.
Solution Approach 2:
The invention performs preliminary measurements of fixed vehicle dimensions (seat height, backrest position) that can be done quickly in the workshop. By preparing these base measurements first, the subsequent calculation of the prohibited installation area can be performed rapidly using the pre-established reference values.
Data Source
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AI summary
The invention relates to a method for determining a region (9) in which a sensor cannot be installed, in particular a photo or video camera, on a windscreen (8) of a utility vehicle (1) in order to avoid obstructing the view of the vehicle driver with the sensor, said method comprising the following method steps: I measuring the distance (HS) between a seat surface (6) of a vehicle driver's seat (5) and a surface of the ground (4) on which the wheels (11) of the utility vehicle (1) are standing; II measuring a distance (WS) between a backrest (6) of a vehicle driver's seat (5) and the inner surface of the windscreen (8) at a predetermined height (HP) above the seat surface (6) of the vehicle driver's seat (5) parallel to the surface of the ground (4); and III determining coordinates (HL, VL) of a corner point (P) of a rectangular no-installation region (9) on the windscreen (8) based on the distance values measured in steps I and II via a calculation algorithm, wherein HL corresponds with the distance of the corner point (P) from a notional centre line (MS) of the vehicle driver's seat (5) in the direction of a passenger-side edge (13) of the windscreen (8) and VL corresponds with the distance of the corner point (P) from the surface of the ground (4), wherein the no-installation region (9) of the windscreen (8) extends vertically from the corner point (P) to the upper edge (14) and horizontally to the driver-side edge (12) of the windscreen (8).