Blind spot assistants are an automotive radar application which monitor the area behind and along side the vehicle – (in accordance with specification ISO17387– Type 1).
InnoSenT has developed a blind spot assistance system which has been successfully offered on the market since 2006. The 24GHz radar sensor technology of the system is characterised by an especially attractive price-performance ratio.
The radar sensors can be easily mounted invisibly behind the plastic bumpers of the vehicle. A major reason for the decision of numerous OEMs in Asia, Europe and the USA for the use of the Hella LCA system.
The lane change assistant developed from InnoSenT, meets the demand for a greater range. This function is specified according to ISO17387 Type II and Type III .The lane change assistant only works with one 24 GHz sensor per vehicle side. The two radar sensors are usually - invisible from the exterior- mounted in the corners of the rear bumpers. Mounted in this manner, radar waves can determine the field far behind the vehicle and also cover the area alongside the vehicle according to the ISO specification.
Design and functionality of the human-machine interface (HMI) is incumbent on the vehicle manufacturer. Usually two warning levels are implemented: The lane change assistant shows passing and approaching vehicles in the neighbouring lanes beginning at a speed of approx. 30 km/h. The display is done using an LED signal in the respective outside mirror. If the driver uses the blinker in such a situation, the second warning level is activated. This warning can be done optically (e.g. red-lighted warning triangle in the respective outside mirror) as well as acoustically and /or haptically (e.g. vibration of the steering wheel).
In the further development of the lane change assistant, numerous technological improvements have been realised including cross traffic alerting.
This warning of cross traffic can be seen concretely in this situation:
To reverse out of a parking space, generally increased attention must be given to safety. It becomes critical when a busy street with cross traffic is located behind the parking space. The view behind of the street is frequently blocked by neighbouring parked vehicles. Now there is only one thing to do: Ease out backwards slowly into the street.
With the optimised sensors in the lane change assistant, our radar can assist the driver here too. The rear cross traffic is determined during the reversing manoeuvre - and the driver is warned of collision danger. Our antenna technology makes it possible to combine ISO 17837 applications with the functionality of cross-traffic alerts.
Fitted in the rear, the InnoSenT radar sensors monitor the area behind the vehicle. The sensors recognise an imminent collision of a vehicle driving too close behind, thereby allowing accident prevention systems to be activated and vehicle components to be brought into an optimum position. One example is the automatic tensioning of safety belts. This plays a significant role in minimising the risk of injury in the vehicle. InnoSenT has two bandwidths for manufacturers of PreCrash systems. Firstly, the standard 24 GHz sensors, which are cost-efficient, lightweight and can be concealed when installed, making them particularly well suited for the volume segment. Secondly, the 77/79 GHz sensors which are available for applications that need to satisfy stricter performance and system integration requirements.
Usually designed as an extra for the lane change assistant, the exist assistant uses the radar sensors in the rear of the vehicle. The sensors scan the exit area on the driver’s and passenger’s side after the ignition has been switched off, and recognise hazards or dangerous situations such as passing vehicles or bicycles. Before the person inside the car leaves the vehicle an acoustic warning is sounded, or even safer, the door is automatically locked. InnoSenT supplies 24 GHz and 77/79 GHz radar sensors for the exit assist function.
Moreover all of our sensors for automotive applications function in an ISM band with a bandwidth of between 85 and 200MHz, in stark contrast to the 24GHz-ultra wide band technology whose use is limited in time in Europe.
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