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black box airplane concept vs error memory in car

IS MY CAR HAVE A BLACK BOX?


The Black Box usually we heard when there have a crash in airplane. Do we know that in other things also have similar concept to black box function? Let me thinks..Hmm..Actually this is part of my job as failure analysis engineer. I have to analyze each byte or each line of error memory(together with development team when required:)..) to know what is the problem with our unit specifically and impact to user while driving? Its quite interesting task because from here we can justify what is the problem. 

Our question now Is it similar concept to Black Box is airplane?

I can said Yes and No:).

Let have a look what is concept of Black Box in airplane.

Concept Of Black Box













According to wiki, black box is a box which contain electronic recording device placed in aircraft for the purpose on analysis and investigation if there have an accident. 

There are two different flight recorder devices: 

1. The flight data recorder (FDR) preserves the recent history of the flight through the recording of dozens of parameters collected several times per second. 

2. The cockpit voice recorder (CVR) preserves the recent history of the sounds in the cockpit, including he conversation of the pilots. The two devices may be combined into a single unit. 

Concept Of Error Memory In Car

First, did the error memory is created for Car or Infotainment System in Car? My answer now is infotainment system. But I believe modern car itself have similar concept..

Infotainment System is human machine interface which is like a box working as interface between driver and car. 

What is Human Machine Interface and What is relationship with error memory?

HMI is a medium for user to interact with the machine. For instance, when user press a plus button in Steering Wheel Control(SWC), the signal will send through CAN line(low speed) to the HMI and HMI will trigger the speaker to work accordingly. 

Now, let's back to the error memory. In general, HMI contains a main memory, dram and processor. Error memory basically will stored in main memory.

Error memory contains error log including software exception, bug, and all component which connected to system power management.Media player/FM/AM/XM,Gps and etc.

In conclusion, I believed error memory is essential to know the cause of the problem and prevent any repeated failure😀

 

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