UPAS-10
UPAS (Ultrasonic-based PAS)
This system warns a driver of the presence of obstacles in back of a vehicle during parking manoeuvres at low speed operation. Ultrasonic parking sensors make use of sound echo to detect and calculate the distance between the car and other objects. These hardware placed on the bumper of the car to ensure that the acoustic waves can travel uninterrupted. They alert the driver by beeping an alarm; as the car moves closer to the obstacle in rear-end blind zone, the beeping increases in frequency.
Features
• Detection Range : 300mm ~ 2,000mm
• 4 sensor system fitted to rear of vehicle
• System activated by reverse gear
• Parking Assistance System for Commercial Vehicle
• This application measures the distance of obstacles in back of the vehicle when putting the car in Reverse and warns a driver of an impending collision by audible warning and visual signal.
• Parking convenience : Since they alert the driver of objects that can’t be seen in the mirror, they also have safety benefits. And, Most of trucks and buses can’t see the road situation in rear-end blind zone of a vehicle through any kind or mirrors.
• Pedestrian Detection in rear-end blind zone
• Obstacles Detection / Moving Object Detection
Product Components
Product Components
• Ultrasonic sensor 4 sets fitted into Truck and Buses
• 1 Control box
• Connection with O/E Vehicle components :
• Vehicle’s Cluster via CAN ( Visual Notification )
• Vehicle Speaker via CAN ( Audio Warning )
Target market
• PDI / PIO market for Truck and Buses
• Semi-Before market for Truck and Buses
Technical specifications
& Installation
Ultrasonic transducer
• Detection Range : 300 ~ 2,000mm
• Directivity : 90° H x 40 ° V
• Frequency : 48kHz
• Interface : LIN 2.1
Control Unit
• Operating Voltage : DC29 ( 10V ~ 36V )
• Operating Temperature : -30°C ~ 75°C
• Interface : CAN 2.0 , K-Line ISO9141
GPIO for Reverse Signal
Connection to both cluster and speaker via CAN
Principles & Mechanisms
• A parking assist system (PAS) calculates the distance between the vehicle and an object (an obstacle or another vehicle) based on the time it takes for ultrasound emitted by a sensor reflecting from an object and coming back, and communicates the information to a driver for safe parking. As PAS permeates the automobile market, there was a potential demand for a small and highly reliable pin connection type sensor capable of automated mounting, from the viewpoints of lower assembly cost and quality assurance.
• As an ultrasonic systems relies on the reflection of sound waves, the system may not detect flat objects or object insufficiently large to reflect sound — e.g., a narrow pole or a longitudinal object pointed directly at the vehicle or near an object. Objects with flat surfaces angled from the vertical may deflect return sound waves away from the sensors, hindering detection. Also soft object with strong sound absorption may have weaker detection, e.g. wool or moss.
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Let's look at parking sensors as an example. Parking sensors use a type of sonar. The term sonar is an acronym for sound navigation and radar; it's used for calculating the distance and/or direction of an object from the time it takes for a sound wave to travel to the target and back. An ultrasonic sensor is a speaker or microphone that emits or receives ultrasound. There is also a type that can handle both emission and reception. Vehicle parking sensors are equipped with this type of sensor.
Ultrasound is an acoustic wave with a very high frequency, beyond human hearing. Since the audible frequency range is said to be between 20Hz and 20kHz, ultrasound generally means acoustic waves above 20kHz. Bats, with their echo-location (biological ultrasonic radar), can hear sounds up to 200kHz, way beyond the capabilities of the human ear.
