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Percept Sensors: Vehicle Sensing Solutions

Percept Sensors from Molex provide innovative technology to reduce unwanted noise, enhance driver comfort and safety, and detect objects beyond the line of sight, offering comprehensive vehicle sensing solutions. 

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Product Highlights

Percept Road Noise Cancelling (RNC) Sensor Assembly

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Features and Benefits

Road Noise Cancellation

Ultra-quiet cabins with a lack of combustion engine noise amplify unwanted road and structural noises. Percept Sensors capture these noises and enable a reduction of perceived sound by signaling intelligent audio algorithms, which, in turn, project cancelling waves through the vehicle audio system. Noise and vibration significantly affect driver fatigue, so solving the noise problem is not just a matter of comfort. It is also beneficial concerning road safety.

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Advanced Driver-Assist Systems (ADAS) Solutions

The implementation of road noise cancellation has a positive effect on advanced driver-assist systems (ADAS) by diminishing the overall noise within the vehicle cabin. This improvement enhances the accuracy and reliability of audio-based alerts and notifications, thereby fostering better communication between the driver and the vehicle's ADAS features.

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TouCH Sensors and Autonomous Driving

Most ADAS/AV sensors are visual components, like cameras, radar and LiDAR. They sense in a spatial environment but do not detect objects close to the surface or ones that make contact. Percept TouCH sensors help fill the gap left with line-of-sight-only sensors. They capture low-energy vibrations created when an object contacts the vehicle and convert them into signals that trigger an appropriate automated response.

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Permits low latency and results in less time between the sensor receiving vibrations and the module receiving a notification signal
A2B digital communication protocol

Reduces the harness weight of the vehicle and eliminates heavy star-pattern cabling
Daisy-chained sensor design

Enables the sensor to be placed where needed, protecting against water and dust ingress in harsh environments such as adjacent to the tire
IP6K9K rating

Allows for a cleaner signal, leading to improved system efficiency
Superior packaging design

Features high sensitivity to energy sources, allowing sensor placement farther from the energy source if required
Low noise density excitation

Offers flexibility for parallel or perpendicular sensor positioning relative to the ground to enable mechanical mounting to a vehicle and permit a variety of connector orientations and terminal sizes
Various mechanical housing configurations available

Provides 50% space savings over traditional USCAR 0.64mm connectors and delivers superior signal integrity performance ideal for transportation environments
Exterior sensors mate with 1x4 sealed Mini50 connectors

Provides superior electrical contact reliability, mating retention and space savings compared to competitive versions for high-vibration and high-temperature applications
Interior sensors mate with 1x4 Duraclik connectors

Captures vibration energy transfer from the suspension into the vehicle chassis at the earliest perceptible time, enabling optimal timing of corrective action
4 to 8 sensors located on the chassis frame

Overview

The quiet cabins of today's vehicles can make road noise more noticeable than ever, affecting the customer's driving experience. State-of-the-art Percept Sensors provide a cutting-edge noise cancellation solution that helps create a serene and comfortable environment by reducing unwanted noise, including road and engine sounds. 

Beyond elevating vehicle performance and enhancing driver comfort, the Percept noise-cancelling system plays a role in improving road safety by combating driver fatigue and minimizing distractions. Percept Sensors assist drivers in staying focused and alert.

Percept Sensors also optimize communication systems within the vehicle, delivering audio-based alerts and voice commands for seamless interaction between the customer and the vehicle. All this is possible with a 3% to 5% weight reduction through daisy-chain architecture and the removal of noise-dampening materials.

Applications by Industry

Commercial aviation
Condition-based monitoring
Fleet and commercial vehicle monitoring
Off-highway and construction vehicles
Train and locomotive monitoring
Vehicle diagnostics
Active noise cancellation
Advanced driver-assistance systems (ADAS)
Automated parking sensors
Autonomous vehicles
In-cabin noise reduction
Security/anti-vandalism systems

This is not a definitive list of applications for this product. It represents some of the more common uses.

Resources

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In-Cabin Noise Reduction

Introducing the Percept Road Noise Cancelling (RNC) Sensor by Molex, designed for superior performance in automotive environments. With a latency of less than 150 μs and a low noise floor, these sensors enable rapid response to road noise conditions and effective noise cancellation even at lower speeds, providing a competitive edge in sensor sensitivity and placement flexibility.