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Engineering Fields - Control Engineering - Newby Member Long Time User Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jun 2006
Posts: 224
Good Answers: 9

Wireless Pressure Measurement

03/24/2010 6:30 PM

I have a control system with analog inputs (10 Vdc). I'd like to add pressure measurement inputs (from 5000 psi transducers), but I'd rather not have to utilize a cable out to the transducers.

In other words, I'd like to effectively replace the cable with a wireless system that provides an analog output (10 Vdc) which becomes an analog input into my controller.

A preliminary search on Google has not produced any products which will do this.

For those familiar with wireless systems, which companies manufacture products to meet my needs.

Thanks.

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Commentator

Join Date: May 2009
Location: West Point, Texas population around 200.Located between Austin and Houston
Posts: 69
Good Answers: 2
#1

Re: Wireless Pressure Measurement

03/24/2010 9:29 PM

Here is something at the start,http://www.pointsix.com/cgi-bin/PointSix.cgi?ANALOG_900,,,,I googled,,wireless analog transducer.

Now give me a Good Answer.

Joe in Texas

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Guru
United States - Member - New Member Engineering Fields - Control Engineering - New Member

Join Date: Mar 2006
Location: Washington USA
Posts: 566
Good Answers: 53
#2

Re: Wireless Pressure Measurement

03/24/2010 10:17 PM

Honeywell and Emerson both have off the shelf solutions.

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#3

Re: Wireless Pressure Measurement

03/26/2010 1:31 AM

Emerson make wireless instruments to be used

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Guru
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#4

Re: Wireless Pressure Measurement

03/26/2010 3:25 AM

Bridge the connections on PC-1, then connect router 2 as a WAP using the following configuration.


Connecting two (or more) SOHO broadband routers together.

Note: The "primary" router can be an actual router, a software gateway like Microsoft Internet Connection Sharing, or a server connection that has the capability to supply more than one IP address using DHCP server capability. No changes are made to the primary "router" configuration.

Configure the IP address of the secondary router(s) to be in the same subnet as the primary router, but out of the range of the DHCP server in the primary router. For instance DHCP server addresses 192.168.0.2 through 192.168.0.100, I'd assign the secondary router 192.168.0.254 as it's IP address, 192.168.0.253 for another router, etc.

Note: Do this first, as you will have to reboot the computer to connect to the router again for the remaining changes.

Disable the DHCP server in the secondary router.

Setup the wireless section just the way you would if it was the primary router, channels, encryption, etc.

Connect from the primary router's LAN port to one of the LAN ports on the secondary router. If there is no uplink port and neither of the routers have auto-sensing ports, use a cross-over cable. Leave the WAN port unconnected!

This procedure bypasses the routing function (NAT layer) and configures the router as a switch (or wireless access point for wireless routers).

For reference, here's a link to a Typical example config using a Netgear router

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