Hand Hygiene

After speaking with Interlink support, they sent me to Trossen Robotics who has the 0.5″ FSRs for a coupl ebucks cheaper than SparkFun. I put in an order for 10 today after destroying the solder tabs on the one we currently have.

Interlink also gave insight into the termination on the FSRs — they come in three flavors: unterminated, solder tabs, and female (some connector). Anything other than solder tabs is a special order with 8 week lead time, so that’s out. By default, interlink crimps the FSRs with these Tyco terminals. More information on this type of connector can be found here. I’ve also ordered this female SMT ZIF connector.

EDIT: Just got that connector in from Digikey and it should work fine. I found this 2-circuit directly from Tyco (P/N 5-520314-2)  — digikey doesn’t stock the 2-circuit flavor (unless we want 10,000 of them). We may want to look into buying prefab FFC that will connect the 5 leads on the mote to the FSR board header. Tyco does not sell this cable. It might not be worth it, though — might be easier just to user regular wire and std header crimps — but it would look cool I suppose. The flatness and uniformity of the FFC isn’t really required for this application, but it’s nice and tidy. Same logic applies with the 4 USB leads. We could use solder tabs to connect to the mote and a similar 4 circuit female receptacle on the FSR board. IMO, it’s probably more efficient to use wire and std header connections.

I figured that it may be a good idea to keep a list of everyone’s phone numbers in case we need ot get a hold of someone or ask a question…. If you are comfortable with that, please put your phone number on the whiteboard upstairs next to the treadmill.

[I don't have permission for /farming so I'm leaving this info on /handhygiene]

Plants 10,12,15,16 (regular grow light, 2 in each row) have each sprouted approx 5mm

The door minder 2.0 design with the reflector has been exceedingly flakey, so we have decided to go back to a design with a separate sender and receiver. This uses a 555 timer in the sender to generate the signal for the infrared LED instead of the mote. This way only the receiver will need a mote. The following are schematic and board designs for the new sender and receiver.

Inside the box for the sender, there will need to be room for a battery pack (2 AA’s or AAA’s) in addition to this board.

Inside the box for the receiver, there will need to be room for the mote and a battery pack in addition to this board.

Sender:

Receiver:

I tested the two D-Link antennas today with the Arduino/Servo set up. I collected 5 trials for each antenna.

Here are the results:

D-Link 1 (square-looking antenna):

Considering the 5 trials, this antenna had amazingly precise results! However, there isn’t the separation between 1 and 2 meters that we’re looking for.

D-Link 2 (tall cylindrical antenna):

The second antenna had the separation that we’re looking for between 1 and 2 meters seen in the CDF plot. I’m not sure about the box plot though – at 2 meters and more it seems really messy. If we call near within two meters of the patient and far further that 2 meters from the patient, this would be the best antenna to use out of the antennas we’ve tested so far.

On Monday (5/24), I took the door minder to the hospital to test it out.

Door 1 (7365) : 34 out of 40 entrances/exits logged. (85%) This was due to bad packets during the experiment.

Door 2 (7365 rest room) : 40 out of 40 entrances/exits logged. (100%) This door was a little smaller than the standard patient room door size.

Door 3 (7364) : 15 out of 40 entrances/exits logged. (37.5%) Not sure what caused this problem – door minder could be reflecting off of something else or the door frame is different ??

Door 4 (7363) : 40 out of 40 entrances/exits logged. (100%)

So, basically doors 2 and 4 were great, door 1 was okay except for the bad packets, and door 3 just didn’t give good results.

I went to the RSCU, the MICU, and the SICU to get an idea of the number of pucks, anchors, and pagers we’ll need for the implementation in August.

The collected information is in a Google doc (link). With this information, we thought that 75 Pucks and 45 Anchors (including back-ups) would be a good starting point.

We talked about doubling the number of estimated pagers to give them a chance to charge. We need more information on the number of full-shift workers and how to get consulting workers to take part in the implementation.

Notes:

Some hand sanitizer bottles were on carts & desks, not in a bracket on the wall.

There are many other areas to consider – equipment storage, front desk, conference rooms, on-call rooms, lounges, family waiting areas, respiratory care rooms, etc. These rooms are included in the number of anchors.

Both the SICU and the MICU have a hand-washing station with soap and water.

The patient rooms are a lot smaller and more crowded together in the SICU and the MICU.

I started a new grow today. After I stabilized pH to around 5.5, I planted 16 lettuce plants (numbered 1-16; 8 under each light) and 2 catnip plants (numbered 17,18) at a little after 6pm.

When sending Pro/E files to the RDPC 3D printer, save as STL with chord height 0.o03″, angle control 0.125″.  This does not seem to apply with using ITS 3D printer — but will produce a fine mesh, so for most parts that we print, we should always use these settings (regardless of where we send it)

I have assembled the new swivel anchor, complete with mote and custom circuit board. A few difficulties were encountered:

It was difficult to feed the wires through the arms holding the case for the mote. This is because there was not much to hold the wires in place. I ended up securing them temporarily with electrical tape.

The corner of the board near the usb connector was not staying at the height it needed to be for the usb connector to go through the hole. This was because there was nothing to hold that corner in place. (the other three corners had screws) I ended up putting only two screws in the board, with the corner opposite to the corner in question left bare.