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nasimson
nasimson
1/6/2015 11:24:27 PM
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Master
Re: Duplicated Protection Device
@ Sunita:

> Driverless cars have already been unpopular for one or more
> reasons, it doesn't need faulty electronics as the icing on the cake.

Imagine an automobile company like Ford or GM recalling one of their driver-less cars from the market. That kind of scenario will completely shake the customer confidence in their newer models.

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goafrit2
goafrit2
1/6/2015 1:24:10 PM
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Master
Re: Duplicated Protection Device
>>  As a result auto manufacturers have to consider these standards and have to add protection devices to their modules to fulfill the major obligations imposed by those standards.

And those standards have kept the market to three companies - Conti, TRV and Bosch. It is nearly impossible for a new entrant to get into that sector. No auto company will work with you because of the risk of something working today and in four years blow up for car recall. Yet, that is what the sector needs since cars are designed so that once you know how to drive Honda, you can drive Toyota. Imagine if we have that for software!

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goafrit2
goafrit2
1/6/2015 1:20:19 PM
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Master
Re: Duplicated Protection Device
>> Driverless cars have already been unpopular for one or more reasons, it doesn't need faulty electronics as the icing on the cake.

The biggest limitation to driverless cars will not technology. Rather, it will be innovations on roads. You cannot have driverless cars when cities are so broke they cannot patch pot-holes. My doubt on these cars has nothing to do with the technology but on governments that will build the required roads for them

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goafrit2
goafrit2
1/6/2015 1:17:54 PM
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Master
Re: Duplicated Protection Device
>> I think every shipment of electronics has a defective piece among its ranks,

That is not true if you work in the biomedical sector. The guarantee is that the product not just work in the factory but live in someone's heart for 15 years. If you cannot say SO, you cannot make it.

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SunitaT0
SunitaT0
12/31/2014 4:16:09 AM
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Master
Re: Duplicated Protection Device
@goafrit2: As you noted, there might be some redundancies in the quality of electronics, and that cannot be helped. I think every shipment of electronics has a defective piece among its ranks, and that may not be deal breaking. If electronics are tested when they are made, and again when they are delivered, the problem goes away since we can easily find the defective piece. Everything cannot beblamed on the electronics supply chain management system.

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SunitaT0
SunitaT0
12/31/2014 4:15:14 AM
User Rank
Master
Re: Duplicated Protection Device
@Netcrawl: I see what you are hinting at. Automobiles need the best kind of electronics that are fault proof. Of course, a headlight can be changed, but since automotive industry is trying to go on autopilot and connected car systems, electronics become a major issue. Any fault in the electronics in the ABS braking system or traction control system can wreck havoc. Driverless cars have already been unpopular for one or more reasons, it doesn’t need faulty electronics as the icing on the cake.

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VarunReddy
VarunReddy
12/14/2014 12:38:21 PM
User Rank
Newbie
Re: Duplicated Protection Device
that was exactly what i felt

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samicksha
samicksha
12/14/2014 10:58:40 AM
User Rank
Artist
Re: Duplicated Protection Device
Yes I agree your point on TVS diodes, but again TVS will fail if they are subjected to voltages beyond those that the particular product was designed to allow.

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Victor Lorenzo
Victor Lorenzo
12/14/2014 5:53:15 AM
User Rank
Blogger
Re: Duplicated Protection Device
If we take a look at a modern car electronic systems they are mainly built on top of "independet" modules, connected by means of digital and/or optical buses and interfaces. The vast majority of those modules are digital and analog subsystems are limited mainly to sensory. There is a trend to develop and integrate sensors with digital interfaces.

Even if we integrate a centralized and super-protected DC power module we are in need of distributing power all around the car and that is made using wires and cables. Near 100% EMI/surge inmune cooper cables are not practical for car systems due to cost and volume. It is most cost effective and safe to apply protections at several levels, at leas at interferences source (when practical, like the alternator) and at local modules.

MOV's and TVS diodes are relatively cheap taking into account the importance of their function.

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Netcrawl
Netcrawl
12/11/2014 8:51:53 AM
User Rank
Master
Re: Duplicated Protection Device
@Daej electronic equipments represents a large part of the modern automobile, although electronic modules brings much more comfort and security for the vehicle user, they also bring significant concerns in terms of reliability regarding the automobile environment. several standards have been made to model the electrical hazards that are currently found in automobiles. As a result auto manufacturers have to consider these standards and have to add protection devices to their modules to fulfill the major obligations imposed by those standards.

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