The concept of EDR is essentially a software module integrated in the airbag control unit, which can record the key operation data of the vehicle in three stages before, during and after the collision.
For example, the speed when you are driving, the steering angle of the steering wheel, the condition of the brake pedal, etc., are clearly recorded by EDR, and then uploaded to the cloud to save a copy, so that the cause of the accident can be analyzed in detail in the later stage.
For example, some time ago, Tesla made a lot of noise about the rights protection of female car owners. At the request of relevant departments, Tesla also released the driving data recorded by EDR at that time, which can be regarded as avoiding rashomon event. In the end, the car owner was sued by Tesla for reputation rights and lost money. And coincidentally, in the United States, Tesla has to rely on EDR to crack the truth when it hits a tree.
bluetooth technology EDR:
Enhanced data rate, which is the abbreviation of enhanced rate in bluetooth technology, is characterized by greatly improving the data transmission rate of bluetooth technology, reaching 2.1Mbps, which is three times that of current bluetooth technology.
In the specification of p>Bluetooth2., EDR appears as a supplement, which correctly defines the change of modulation technology and additional packet types, which enables it to transmit at the rate of 3MBPS. Therefore, what we usually see is "Bluetooth core specification version 2.+EDR". The actual situation is: at present, there is no Bluetooth application that needs to transmit more than 1MBPS. Even if it is a high-quality stereo data stream, it must use Subband codec; SBC codec, it only needs 345KBPS at most.