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TonyNo
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| Posted: August 10 2005 at 23:21 | IP Logged
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A new project! 
I'm currently testing an idea that I had for using Hawkeye motion sensors and Multi-X to tell when someone enters or exits a room. Not just motion, but direction of the motion (in or out).
More later as the test continues!
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krommetje
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| Posted: August 11 2005 at 04:22 | IP Logged
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TonyNo wrote:
| A new project!I'm currently testing an idea that I had for using Hawkeye motion sensors and Multi-X to tell when someone enters or exits a room. Not just motion, but direction of the motion (in or out). |
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I am eagerly awaiting your tests... I can imagine how you'd do it with 2 sensors... If you would place them in a 180degrees angle of eachother and combine the commands with a macro.... Am I in the right direction?
Peter
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TonyNo
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| Posted: August 11 2005 at 20:26 | IP Logged
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So far, so good!
Yes, they are side-by-side. I also masked off all but the center 1/8" of the lenses with electrical tape to narrow their field of view.
This is economical due to the occasional sales x10.com has on these.
Now I just need to come up with some good logic to tie this in with general motion for better light control and such. I hate when I go into a room and the light goes out if I linger...
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krommetje
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| Posted: August 12 2005 at 10:05 | IP Logged
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Well let me think, perhaps if you could make a distinction between which hawkeye sends its code first.... when hawkeye 1 sends first and then 2 then the motion is outgoing, when the other way around the motion is incoming or if you could read the time of both codes changed and substract them... if the outcome is positive then the motion is incoming, when negative, then the motion is outgoing e.g. or make a macro which AND checks which code was received first AND checks the receival-time!
This would still however not solve the problem when you linger... that would take some more thinking. a timer and reset of the timer when you are moving around would be a solution, if you'd use a GV which is 1 when you are at home then either one of the hawkeyes would be sufficient to change the timer....
This all is just a brainstorm... 
Peter
Edited by krommetje
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TonyNo
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| Posted: August 12 2005 at 10:27 | IP Logged
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Oh, I have the code done to count how many people are in a room. That is where MultiX comes in. You have the logic correct. 1-then-2 is "in" (count+1) and 2-then-1 is "out" (count-1).
MultiX makes it easy. The Hawkeyes are set up on HC F and UC's 1/2 and 3/4. A MultiX query of ph_multix("F", 1, 2) that returns "F0102F0302" means "in" and "F0302F0102" is "out".
I was referring to adding this to the motion sensor logic already in place. Maybe to turn the light off immediately when the room count goes to zero.
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krommetje
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| Posted: August 13 2005 at 12:02 | IP Logged
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Wow, makes you curious.... when you are at work and your wife is alone at home and suddenly a second person pops-up 
However, it is not a bad idea to have the lights turn on when the count is 1 or above... But what happens when one of the hawkeye sends a code and PH doen't receive it? Then the whole room count is lost... If you'd use a GV to store the last room count, you'd have a fall-back or am I lost now?
Peter
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TonyNo
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| Posted: August 13 2005 at 18:20 | IP Logged
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Have not been married for a while, so, it's not an issue! 
Quote:
| what happens when one of the hawkeye sends a code and PH doen't receive it? |
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Them's the breaks with wireless and X-10!
Things have not been without issue.
I need to relocate my main motion sensor for that room; the second sensor trips about the same time as it does, occasionally stomping on the signal. It's just a matter of fine-tuning the setup, I think. It works well enough so far to give me hope!
Yes, a Global holds the count. I also added code to make sure that the count does not go negative.
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krommetje
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| Posted: August 14 2005 at 04:02 | IP Logged
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TonyNo wrote:
| I need to relocate my main motion sensor for that room; the second sensor trips about the same time as it does, occasionally stomping on the signal. It's just a matter of fine-tuning the setup, I think. It works well enough so far to give me hope |
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perhaps if you'd place them in a near90 degrees angle?
Peter
Edited by krommetje
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TonyNo
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| Posted: August 14 2005 at 09:16 | IP Logged
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They are at 90°. I just need to move the main one. It would be easy if I had field-of-view info for them, but I can't find it anywhere. I even sent a note to X-10.
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krommetje
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| Posted: August 14 2005 at 10:48 | IP Logged
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Perhaps this link will help?
http://info.spruitnet.nl/automation/ms13.html
It is a dual language dutch site from someone who built an MS13 into a birdhouse....
Peter
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TonyNo
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| Posted: August 14 2005 at 11:29 | IP Logged
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Many thanks! I just spent a couple hours reverse engineering the physical properties of the sensor and it's sensitivity!  I come up with 120° versus his 110°.
After sketching it out, I think the solution is to use one pointed across the doorway, and the existing room sensor as the second.
More later...
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krommetje
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| Posted: August 14 2005 at 23:24 | IP Logged
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TonyNo wrote:
| After sketching it out, I think the solution is to use one pointed across the doorway, and the existing room sensor as the second. More later... |
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So One sensor doesn't look into the others field of view?
I presume that one sensor is looking into the room and the other is looking the other way into the doorway and this is a near 90degrees angle.... What have you done with the fact that when a door is open and soneone passes by the room but not actually entering the room? will it trip the light or does someone have to be in the second sensors field of view to have the light switch on?
Peter
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TonyNo
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| Posted: August 15 2005 at 08:22 | IP Logged
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The main motion sensor is next to the door, pointed into the room, and the other is looking across the entry way...
Image
The main sensor trips the light any time it's activated. The room count is only changed when these two fire one after another.
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krommetje
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| Posted: August 16 2005 at 05:51 | IP Logged
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TonyNo wrote:
| The main motion sensor is next to the door, pointed into the room, and the other is looking across the entry way... |
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so you had to narrow the field of view of the sensor that's looking into the entry way? and the Main sensor has full view?
TonyNo wrote:
The main sensor trips the light any time it's activated. The room count is only changed when these two fire one after another. |
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And the light stays on with a timer? What happens if you are e.g. reading a book and don't move for a certain period of time? Or is the roomcount also taken into account for the light to stay on?
Peter
Edited by krommetje
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TonyNo
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| Posted: August 16 2005 at 07:41 | IP Logged
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I don't think I have to narrow the door sensor's FOV anymore. I started that way. The main is unmodified.
Yup! When my Bedtime flag is not set, the timer is ignored and only the room count controls the light.
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krommetje
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| Posted: August 17 2005 at 04:13 | IP Logged
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TonyNo wrote:
I don't think I have to narrow the door sensor's FOV anymore. I started that way. The main is unmodified. Yup! When my Bedtime flag is not set, the timer is ignored and only the room count controls the light.
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I would like to see how you programmed this. Not that I would like to copy the code for my own project but just for learning purposes... I sure am curious!!! I have been thinking for a while to be able to count people in the room, now I have an idea how... I had come up with an idea to give my entire family a keychain with a transponder... In every room there would be reader... since this would cost about $ 2300,- for the entire house, I abandoned (is that the right way to write it?) the idea...
Peter
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TonyNo
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| Posted: August 17 2005 at 07:03 | IP Logged
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The code is fairly straight-forward...
I already described the counting portion. That part is easy, thanks to MultiX.
At bedtime, I set a flag (BedtimeFlag=1) and then in the portion of the code that would dim the light to zero after the timer expires, I just jump around it based on that flag being zero.
Do you mean using RFID? If so, there are a good number of people using it already. If it was not so expensive, I would have asked Dave to add support for the readers! There is a low-priced version, that reads over shorter distances, which is made by Parallax. Maybe this is what you were talking about?
There is also another system that uses high-powered readers that cover a large area (link). In this case, you would not need one in every room.
Edited by TonyNo
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krommetje
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| Posted: August 17 2005 at 07:50 | IP Logged
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Hey that is an interesting link, thanx, I am going to look into that.... actually, RFID was not what I had in mind... here in Holland there is a firm called Conrad and they Have a remote ID-set which is similar... I would take a lot of work to integrate so that is why I didn't follow-up to it. But since this RFID reader has an 2400bd TTL serial interface the integration into PH should be doable
(like in this movie: "impossible, but doable" )
just connect the RFID-print to a MAX232 IC and connect it to the comport....
But first I am going to fool around a bit with MultiX, it like you said: "fairly straight-forward... "
Peter
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Topic: Entry/Exit Sensing
