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2008-05-28 by txt me
Hi Anyone here know where to find a sensor that can recognize people entering a bus door? one that is not that expensive and is practical to use with an AVR? any help will be appreciated. Thanks! chris
2008-05-28 by Leon
----- Original Message -----
From: "txt me" <xolang1@yahoo.com> To: <AVR-Chat@yahoogroups.com> Sent: Wednesday, May 28, 2008 3:02 AM Subject: [AVR-Chat] Vision Sensor/Passenger counter for AVR > Hi > > Anyone here know where to find a sensor that can recognize people > entering a bus door? one that is not that expensive and is practical > to use with an AVR? Irisys makes people counters: http://www.irisys.co.uk/ I used to work for them and designed the original unit. It's got it's own Blackfin controller. Leon
2008-05-28 by Julian Higgison
Hey Chris! > Anyone here know where to find a sensor that can recognize people > entering a bus door? It depends on what you want to do. Do you really truly want to RECOGNISE PEOPLE? (vs, say, a person and a surfboard or a bike?) And just ones ENTERING the bus door? If you truly want to recognize people, and truly care about if they're entering or exiting, you'll need a camera and some pretty sophisticated video DSP.... though that sort of software is probably off-the-shelf these days if you searched enough. But out of the range of any AVR except the newish 32 bit AVR32 series. > one that is not that expensive and is practical > to use with an AVR? If all you care about is seeing if someone or something is in the doorway, and you have the ability to mount something on both sides of the door then this is trivial. - A standard interruptable light beam could work perfectly there. They're really common, and very easy to interface. I played with some that had active low open collector object detect, couldn't be simpler. You can use a TX/RX unit on one side, and just have a reflector on the other side. Julian Higginson Bruttour International P/L Tel : +61 2 9987 1581 www.bruttour.com.au
2008-05-28 by Xiaofan Chen
On 5/28/08, txt me <xolang1@yahoo.com> wrote: > Anyone here know where to find a sensor that can recognize people > entering a bus door? one that is not that expensive and is practical > to use with an AVR? To "recognize" people may be a bit difficult. If you just want to count the people entering a bus door, typically you use an photoelectric sensror (for door/gate/elevator use). They are very easy to be interfaced with any MCU, including an AVR. More established vendors: Pepperl+Fuchs, SICK, Omron, SUNX, Banner Engineering and many others. Xiaofan
2008-05-29 by xolang1
Im looking for an intelligent module that sends some sort of signal to an MCU. The module should be able to negotiate a vehicle environment of changing temp., changing light, etc yet able to recognize persons at some significant accuracy. � so i guess photosensors are not an option --- On Wed, 5/28/08, Xiaofan Chen <xiaofanc@gmail.com> wrote:
From: Xiaofan Chen <xiaofanc@gmail.com>
Subject: Re: [AVR-Chat] Vision Sensor/Passenger counter for AVR
To: AVR-Chat@yahoogroups.com
Date: Wednesday, May 28, 2008, 12:45 PM
On 5/28/08, txt me <xolang1@yahoo. com> wrote:
> Anyone here know where to find a sensor that can recognize people
> entering a bus door? one that is not that expensive and is practical
> to use with an AVR?
To "recognize" people may be a bit difficult. If you just want to
count the people entering a bus door, typically you use an
photoelectric sensror (for door/gate/elevator use). They
are very easy to be interfaced with any MCU, including
an AVR.
More established vendors:
Pepperl+Fuchs, SICK, Omron, SUNX, Banner Engineering
and many others.
Xiaofan
[Non-text portions of this message have been removed]2008-05-29 by xolang1
Thanks Leon, � Do u have an idea/estimate as to how much one of those sensors with relay output (IRC1004)�costs? (excluding the processing module). � Do they accept single orders? � Chris --- On Wed, 5/28/08, Leon <leon355@btinternet.com> wrote:
From: Leon <leon355@btinternet.com>
Subject: Re: [AVR-Chat] Vision Sensor/Passenger counter for AVR
To: AVR-Chat@yahoogroups.com
Date: Wednesday, May 28, 2008, 11:44 AM
----- Original Message -----
From: "txt me" <xolang1@yahoo. com>
To: <AVR-Chat@yahoogroup s.com>
Sent: Wednesday, May 28, 2008 3:02 AM
Subject: [AVR-Chat] Vision Sensor/Passenger counter for AVR
> Hi
>
> Anyone here know where to find a sensor that can recognize people
> entering a bus door? one that is not that expensive and is practical
> to use with an AVR?
Irisys makes people counters:
http://www.irisys. co.uk/
I used to work for them and designed the original unit. It's got it's own
Blackfin controller.
Leon
[Non-text portions of this message have been removed]2008-05-29 by Leon
----- Original Message -----
From: "xolang1" <xolang1@yahoo.com> To: <AVR-Chat@yahoogroups.com> Sent: Thursday, May 29, 2008 6:35 AM Subject: Re: [AVR-Chat] Vision Sensor/Passenger counter for AVR > Thanks Leon, > > Do u have an idea/estimate as to how much one of those sensors with relay > output (IRC1004) costs? (excluding the processing module). > > Do they accept single orders? I don't think that Irisys would be interested in small orders, but you could try them. I don't know how much they cost. Leon
2008-05-30 by Raymond Hurst
You have to use more than a sensor to accurately detect people. This is a company that done some research on the subject: http://www.western-data.com/ Ray txt me wrote:
> > > Hi > > Anyone here know where to find a sensor that can recognize people > entering a bus door? one that is not that expensive and is practical > to use with an AVR? > > any help will be appreciated. > > Thanks! > > chris > >
2008-05-30 by John Samperi
At 01:49 PM 28/05/2008, you wrote: >If you truly want to recognize people, and truly care about if they're >entering or exiting, you'll need a camera and some pretty sophisticated >video DSP.... But will it be able to distinguish between the real Osama and Chaz Liciardello ....? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
2008-05-30 by stevech11
I worked on a project for Chicago Transit where there were passenger-entering sensors on the busses, tied to our system. Several vendors for these. They were modulated IR systems with specialized lenses and optics. Some busses use mag stripe or bar code readers for automated toll collection and passenger ID. --- In AVR-Chat@yahoogroups.com, John Samperi <samperi@...> wrote:
> > At 01:49 PM 28/05/2008, you wrote: > >If you truly want to recognize people, and truly care about if they're > >entering or exiting, you'll need a camera and some pretty sophisticated > >video DSP.... > > But will it be able to distinguish between the real > Osama and Chaz Liciardello ....? > > > > Regards > > John Samperi > > ******************************************************** > Ampertronics Pty. Ltd. > 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA > Tel. (02) 9674-6495 Fax (02) 9674-8745 > Email: john@... > Website http://www.ampertronics.com.au > *Electronic Design * Custom Products * Contract Assembly > ******************************************************** >
2008-06-01 by xolang1
Hi Everyone
Im trying to determine the protocol behind an unknown serial data stream coming from an infrared receiver module with data coming from an IR remote control.
Since I dont have a scope, I tried to hook this signal to a maxim level converter so that it could be viewed on a PC terminal. I tried changing the terminal properties(baud,parity,databits,stopbits) to find a possible sense out of the data stream but no luck so far.
1) I was hoping someone here could recommend a terminal program like hypertrm that has some sort of protocol detection or at least autobaud detection. Or something with its properties easily changeable during runtime.
2) Anyone can make out anything out of the following facts?
With crude techniques, i found that with each key press on the remote control, the -line goes:
- LOW for about 8.5 msec (could be the start bit/char)
- HI for about 4.5 msec
- TOGGLES hi and low for about 52msec (could be the data)
- HI for about 39.5msec (could be the stop bit/char)
The remote control has 41 unique keys of which im guessing the data bits are at least 6bits (64 combinations).
The unit under study is a LED matrix message board with IR remote control as input.
3) Any software that can work as a "PC oscilloscope"? As the data may not even be in ASCII and could have its own character set. So its best to analyze the exact wave form. Buying the scope is not an option for now..too expensive and too bulky.
Any helpwill be appreciated.
thanks again!
- Chris
[Non-text portions of this message have been removed]2008-06-01 by stevech11
Most consumer electronics IR remotes use a protocol called RC5. Google that. It's not compatible with a UART. On AVRfreaks.net, I contributed an AVR implementation and PC side software to make a learning IR remote. Look in the projects section for "TWIRP". Also, there are quite a few other RC5 projects. You can also purchase "IRman" and similar devices that receive RC5 and produce a UART serial corresponding code set of digits. That's what the receive side of TWIRP does, along with a 'scope-like display on a PC. The sending side of TWIRP allows a PC (or microprocessor) to replay learned codes. --- In AVR-Chat@yahoogroups.com, xolang1 <xolang1@...> wrote: > > > Hi Everyone > > Im trying to determine the protocol behind an unknown serial data stream coming from an infrared receiver module with data coming from an IR remote control. > > Since I dont have a scope, I tried to hook this signal to a maxim level converter so that it could be viewed on a PC terminal. I tried changing the terminal properties(baud,parity,databits,stopbits) to find a possible sense out of the data stream but no luck so far. > > 1) I was hoping someone here could recommend a terminal program like hypertrm that has some sort of protocol detection or at least autobaud detection. Or something with its properties easily changeable during runtime. > > 2) Anyone can make out anything out of the following facts? > > With crude techniques, i found that with each key press on the remote control, the -line goes: > - LOW for about 8.5 msec (could be the start bit/char) > - HI for about 4.5 msec > - TOGGLES hi and low for about 52msec (could be the data) > - HI for about 39.5msec (could be the stop bit/char) > > The remote control has 41 unique keys of which im guessing the data bits are at least 6bits (64 combinations). > > The unit under study is a LED matrix message board with IR remote control as input. > > 3) Any software that can work as a "PC oscilloscope"? As the data may not even be in ASCII and could have its own character set. So its best to analyze the exact wave form. Buying the scope is not an option for now..too expensive and too bulky.
> > > Any helpwill be appreciated. > > thanks again! > > - Chris > > > > > > > [Non-text portions of this message have been removed] >
2008-06-02 by xolang1
hi stevech This�input is�very informative. I shall look deeper into the RC5. � thanks! � -chris � --- On Mon, 6/2/08, stevech11 <stevech@san.rr.com> wrote:
From: stevech11 <stevech@san.rr.com>
Subject: [AVR-Chat] Re: auto baud detection
To: AVR-Chat@yahoogroups.com
Date: Monday, June 2, 2008, 1:26 AM
Most consumer electronics IR remotes use a protocol called RC5. Google
that. It's not compatible with a UART.
On AVRfreaks.net, I contributed an AVR implementation and PC side
software to make a learning IR remote. Look in the projects section
for "TWIRP". Also, there are quite a few other RC5 projects. You can
also purchase "IRman" and similar devices that receive RC5 and produce
a UART serial corresponding code set of digits. That's what the
receive side of TWIRP does, along with a 'scope-like display on a PC.
The sending side of TWIRP allows a PC (or microprocessor) to replay
learned codes.
--- In AVR-Chat@yahoogroup s.com, xolang1 <xolang1@... > wrote:
>
>
> Hi Everyone
>
> Im trying to determine the protocol behind an unknown serial data
stream coming from an infrared receiver module with data coming from
an IR remote control.
>
> Since I dont have a scope, I tried to hook this signal to a maxim
level converter so that it could be viewed on a PC terminal. I tried
changing the terminal properties(baud, parity,databits, stopbits) to
find a possible sense out of the data stream but no luck so far.
>
> 1) I was hoping someone here could recommend a terminal program like
hypertrm that has some sort of protocol detection or at least autobaud
detection. Or something with its properties easily changeable during
runtime.
>
> 2) Anyone can make out anything out of the following facts?
>
> With crude techniques, i found that with each key press on the
remote control, the -line goes:
> - LOW for about 8.5 msec (could be the start bit/char)
> - HI for about 4.5 msec
> - TOGGLES hi and low for about 52msec (could be the data)
> - HI for about 39.5msec (could be the stop bit/char)
>
> The remote control has 41 unique keys of which im guessing the data
bits are at least 6bits (64 combinations) .
>
> The unit under study is a LED matrix message board with IR remote
control as input.
>
> 3) Any software that can work as a "PC oscilloscope" ? As the data
may not even be in ASCII and could have its own character set. So its
best to analyze the exact wave form. Buying the scope is not an option
for now..too expensive and too bulky.
>
>
> Any helpwill be appreciated.
>
> thanks again!
>
> - Chris
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]2008-06-02 by John Samperi
At 09:52 PM 2/06/2008, you wrote: > >thanks! > >-chris > Bad cases of hiccups lately it seems...... Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************