The Combine Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
2,199 Posts
Quote:i dont know if this is true but i heard most of the canbus system and diagnostic wiring in an sts is going to be a wireless bluetooth variation. So no more thick wiring harnesses going from engine to cab. Has anyone heard about this? If it is true i would like to see this myself.

I think that would be a bad idea for the system. The signal strength would have to be very strong to get through all the steel of the machine. If you parked two combines beside each other, one may start reading sensors from the other one.

Aside from that, anything wireless has too much of a inconsistant delay because some packets have to be retransmitted, other get get through right away. This might become an issue with any data logging.

How big of a wire harness is there right now? I know Kinze planters use a 3 conductor cable to monitor all the plater boxes when planting. I've seen other systems in other industries that have used just a 2 conductor cable for both power and b-directional signaling. A 12AWG wire pair should be sufficient to power and control all the sensors on a combine with the right engineering.

-Lance
 

·
Registered
Joined
·
7 Posts
I have heard that the Bluetooth is going to be used for is diagnostics. The new Service Advisor program that we are using has this Bluetooth capabilities in it. So instead of hooking up our laptop through a cable to the unit it can be done wireless. So it should be interesting to see.
 

·
Registered
Joined
·
2,199 Posts
Well since the sensors being wireless is apparently not going to happen, then I won't even go into the wireless encryption thing. It just wouldn't make any sense.

-Lance
 

·
Registered
Joined
·
1,149 Posts
Now we are going to have computer viruses and hacker threats in our combines!!!

I think that they should keep everything hard wired. Because a wireless system would have inteference from outside devices, also they would be a lagg. In home networks the internet and other wireless devices tend to be slower than if they are hard wired. If the combines were to go wireless it would be harder to troubleshot where there is a problem. With wires you can test and visually see where a problem may be by looking for torn wires or bad connetions. With the wireless you would need a dealer to come out every time you had a problem because the diagnostic tools would be to costly for the consumer to buy. Using wireless technology for diagnostic purposes in a hard wired set up would be good because then you would not need to be plugged into the machine the service person could follow behind or sit at the edgo of the field and see what may be a problem.
 

·
Registered
Joined
·
2,199 Posts
Home wireless networks can co-exist for a couple reasons. For example, I'll use 802.11g since it is the most common home wireless signal right now. It can run on 1 of 11 frequency ranges (channels) here in the US. They do overlap some, so you end up with only 3 that are useful in most environments. In addition to that is a network name, also know as a SSID that allows devices to determine which network is which.

For a common combine network, all devices would have to be on the same channel and SSID for the purpose of having a standard. Encryption in this scenario would be worthless. Whatever the method of encryption is, would be known by all devices used to talk on that network. This would have to be public knowledge, and therefore not worth the time to encrypt it in the first place. It would just add more complexity to the situation.

As for why it wouldn't work on a combine, well the whole machine is made from mostly steel. Radio signals in general don't pass through steel very well. Tin file cabinets cause problems in an office environment, let alone the many layers of thicker steel used between the cab and engine in a combine.

On top of that, it's not like it is very difficult to get a wire pair from one end of the combine to the other. This CAN be done with as little as 2 conductors. The wire looms that run through combines now isn't necessary with the correct components.

-Lance
 
1 - 7 of 7 Posts
Top