Vehicle distance/speed sensor

Hello All,
I am doing some research on speed sensors and was wondering what types of
speed sensors are people aware of that can be used as a part of an Inertial
Nav system.
cheers

STUPIDENT

arvkr wrote:

> Hello All,
> I am doing some research on speed sensors and was wondering what types of
> speed sensors are people aware of that can be used as a part of an Inertial
> Nav system.
> cheers
> 

On Apr 21, 10:37&#4294967295;am, "arvkr" <krarv...@gmail.com> wrote:
> Hello All,
> I am doing some research on speed sensors and was wondering what types of
> speed sensors are people aware of that can be used as a part of an Inertial
> Nav system.
> cheers

If you are designing an "Inertial" Nav system, why are you looking for
"speed" sensors?  By definition an Internal Nav system would use
"acceleration" sensors.  There are many companies making acceleration
sensors.  Try Analog Devices.

Rick

rickman wrote:

> On Apr 21, 10:37 am, "arvkr" <krarv...@gmail.com> wrote:
> 
>>Hello All,
>>I am doing some research on speed sensors and was wondering what types of
>>speed sensors are people aware of that can be used as a part of an Inertial
>>Nav system.
>>cheers
> 
> 
> If you are designing an "Inertial" Nav system, why are you looking for
> "speed" sensors?  By definition an Internal Nav system would use
> "acceleration" sensors.  There are many companies making acceleration
> sensors.  Try Analog Devices.

If you design whatever you design, why are you responding to the topics 
that you have no slightest clue?

VLV

i mistyped, what i meant when i said part of is a complimentary sensor to
the INS which i can use to fuse the info later. 

Vladimir Vassilevsky wrote:
> STUPIDENT
> 
> arvkr wrote:
> 
>> Hello All,
>> I am doing some research on speed sensors and was wondering what types of
>> speed sensors are people aware of that can be used as a part of an 
>> Inertial
>> Nav system.
>> cheers
>>
Will you please stop?  You're doing far more of a public disservice than 
the idiots who relabel spam, because in this case you're relabeling 
posts that folks may actually want to comment on.

Google Groups, while it is the World's Worst Newsreader, is also quite 
popular.  It has the unfortunate characteristic of taking the title on 
the most recent post in a thread as the title of the whole thread -- 
hence the nosy-parkering by the "SPAM" renamers who can't seem to 
understand that other people with better newsreaders may not want to see 
spammers encouraged with replies.

So when you get all judgmental like this it does more than announce to 
any potential clients of yours just how well you're likely going to 
cooperate with their technical teams.  It also stomps on the the thread 
titles for anyone who uses Google Groups, either occasionally (as I do 
when I'm on the road) or as their main news reader.

If you must shoot yourself in the foot professionally may I suggest 
starting new threads to do it?

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

arvkr wrote:
> Hello All,
> I am doing some research on speed sensors and was wondering what types of
> speed sensors are people aware of that can be used as a part of an Inertial
> Nav system.
> cheers
> 
Any sensor that can measure speed, of course.  This isn't a field that 
has a huge base universal solutions.  There is a lot of room for 
creativity, with a lot of variety of solutions depending on your 
particular price, size, and labor constraints.

In this case I think you just need to keep doing your research, and ask 
yourself in each case how applicable the sensor will be to the 
particular problem that you are dealing with.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

>Any sensor that can measure speed, of course.  This isn't a field that 
>has a huge base universal solutions.  There is a lot of room for 
>creativity, with a lot of variety of solutions depending on your 
>particular price, size, and labor constraints.
>
>In this case I think you just need to keep doing your research, and ask 
>yourself in each case how applicable the sensor will be to the 
>particular problem that you are dealing with.

So far i have done some research on optical sensors, doppler radar sensors
and wheel speed sensors. Optical sensors will have problems when it comes
to dirt, mud etc and hence might not be useful for my application but both
doppler radar and wheel speed sensors are attractive in terms of pricing ,
capability etc. 

arvkr wrote:
>> Any sensor that can measure speed, of course.  This isn't a field that 
>> has a huge base universal solutions.  There is a lot of room for 
>> creativity, with a lot of variety of solutions depending on your 
>> particular price, size, and labor constraints.
>>
>> In this case I think you just need to keep doing your research, and ask 
>> yourself in each case how applicable the sensor will be to the 
>> particular problem that you are dealing with.
> 
> So far i have done some research on optical sensors, doppler radar sensors
> and wheel speed sensors. Optical sensors will have problems when it comes
> to dirt, mud etc and hence might not be useful for my application but both
> doppler radar and wheel speed sensors are attractive in terms of pricing ,
> capability etc. 

A method that would adapt any of those to inertial navigation is worthy 
of a patent,

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

On Apr 21, 3:02 pm, "arvkr" <krarv...@gmail.com> wrote:
> >Any sensor that can measure speed, of course.  This isn't a field that
> >has a huge base universal solutions.  There is a lot of room for
> >creativity, with a lot of variety of solutions depending on your
> >particular price, size, and labor constraints.
>
> >In this case I think you just need to keep doing your research, and ask
> >yourself in each case how applicable the sensor will be to the
> >particular problem that you are dealing with.
>
> So far i have done some research on optical sensors, doppler radar sensors
> and wheel speed sensors. Optical sensors will have problems when it comes
> to dirt, mud etc and hence might not be useful for my application but both
> doppler radar and wheel speed sensors are attractive in terms of pricing ,
> capability etc.

I am not expert on this, but the units I have seen to measure the
speed of a vehicle use an optical sensor mounted on the speedometer
cable.  I guess that shows how current my knowledge is; I doubt that
cars even have speedometer cables now.  If they don't, there will be a
speed sensor already on the transmission output which is where the
speedometer cable would mount.  Unless you plan to measure each wheel
speed to determine direction of the vehicle, you don't need to
directly measure the speed of the wheels.  The transmission take off
is a much better way to measure vehicle speed.

Rick