Ultrasonic Sensor Wave Transmission Control for Vehicle Object Detection
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Solution Overview
Problem
Conventional object detection systems face challenges in achieving accurate and timely detection of objects around vehicles due to varying numbers of determinations, leading to longer detection times and potential erroneous results.
Innovation Solution
An object detection system utilizing ultrasonic distance measurement sensors positioned strategically around a vehicle, with a wave transmission control unit that prioritizes sensors that have already detected an object, allowing for sequential ultrasonic wave emission and repeated cyclic control to determine objects based on multiple detections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of times of performing determinations is varied to suppress erroneous determinations, then detection accuracy is improved, but detection time is prolonged
Solution Approach 1:
The patent performs preliminary detection using sensors (camera, radar, lidar) before activating the ultrasonic distance measurement sensors. This preliminary action identifies potential objects and their locations in advance, allowing the system to focus subsequent ultrasonic determinations only on relevant areas, thereby reducing unnecessary detection cycles and shortening overall detection time while maintaining accuracy.
Solution Approach 2:
The patent applies different detection strategies to different spatial regions. By using preliminary detection to identify object locations, the system concentrates ultrasonic wave transmissions only in areas where objects are detected, rather than uniformly scanning all areas. This localizes the high-precision determination to specific regions of interest, improving efficiency and reducing detection time.
2Area of stationary object
If all distance measurement sensors transmit ultrasonic waves simultaneously, then detection coverage is maximized, but system complexity and energy consumption increase
Solution Approach 1:
The patent segments the wave transmission process into sequential phases based on preliminary detection results. Instead of all sensors transmitting simultaneously, the system divides sensors into groups or sequences them according to the detected object locations. This segmentation reduces the complexity of coordinating simultaneous transmissions while maintaining comprehensive detection coverage through structured sequential transmission.
Solution Approach 2:
The patent implements periodic cyclic wave transmission control where sensors transmit ultrasonic waves in repeated cycles according to a predetermined order. This periodic action allows systematic coverage of all detection areas over multiple cycles, achieving comprehensive detection coverage while managing system complexity through rhythmic, organized transmission patterns rather than simultaneous operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables faster and more accurate object detection by prioritizing detection ranges where objects have been preliminarily detected, reducing unnecessary wave transmissions and improving reliability.
Implementation Method 1
each include a wave transmitter to emit ultrasonic waves and a wave receiver to receive reflected ultrasonic waves reflected at an object
Data Source
AI summary
An object detection system includes distance measurement sensors and a hardware processor functioning as a wave transmission control circuit and a determination circuit. The distance measurement sensors provided at different positions in a vehicle. The wave transmission control circuit sets one of the distance measurement sensors as a top of a wave transmission order. A detection range of the one of the distance measurement sensors covers a region where an object is located. The object has been detected through preliminary detection when power supply to the vehicle is started. The wave transmission control circuit then repeats a cyclic wave transmission control on the distance measurement sensors to emit ultrasonic waves sequentially in the wave transmission order. The determination circuit determines an object as a detection target object when any one of the distance measurement sensors has detected the object a predetermined number of times.