If you need the audio from these sessions, contact me at didymus7@gmail.com. I'm also a design engineer for inductive displacement sensors and I'd be happy to answer questions. We don't do proximity but high resolution displacement measurements, and correspondingly, the cost for our systems is more.
Reviewing the slides. Why does FireWire only list a length limitation? USB 2.0 also has a length limitation (5m) which isn't much more than FireWire (4.5m). The others would also have maximum lengths, but they are much greater (e.g. 100m for Cat5 Ethernet).
In slide 17, should the sensing part should be metallic? again should it be magnetic?
Inductive proximity sensors respond best to ferrous materials but can also be effective with aluminum and copper targets - a reduced operating distance. We'll discuss this in Wednesday's session.
A sensor by virtue of its function can infact contribute some attenuation in a signal, but generally it is not desired as one wishes to have a high signal to measurement noise ratio
sensors on the other hand will measure a stimulus of some physical form and procide an output indicative of what was measured...in the case of signal conversion to another physical form then it acts in the role of a transducer eg - light energy sensed with an electric signal output in some proportion...vary resistance ans hence current transmitted
Attenuator = signal conditioner ...typically a reduction in the signal level normally expressed in decibels. for example a band-pass fillter might severly attenuate signals ouside its pass-bad of frequencies. A passive resistance T or PI network can be used to match impedance between two end circuits to afford proper power-signal matching, but result in signal attenuation
I seem to remember that Modbus and Baily were proprietary communication systems. Is that true? Are CAN and Ethernet based communications what we should be designing for? Also, does one need to use a special I/O chip to interface the MCU with it's sensor set? Do these "smart sensors" come equipped to use different communication protocols?
The problem is, signal receiving from radioactive izotop is very small and has to be gained more than 1000 times. So ther is no other way avoiding high voltage to reach this gain. Unless new technology sensor.
Can chip sensors be calibrated? Or does one just need to get the performance spec sheet from the manufacturer?
Many of the newest chip based or MEMS sensors are calibrated based on significant integrated signal conditioning circuitry. Additional calibration may be necessary if the application requirment's exceed the sensor's capability, so you would have to refer to the data sheet for that capability.
Re pressure measurements.... You all may recall some of the pressure readings at BP's well head after the blowout in the Gulf were over 17,000 psi. I was floored. We make up lines with swagelock, and I don't think what we use can handle those pressures.
what are the examples of sensors with Ethernet i/f? Wouldn't it be a microcontroller with a sensor with a n/w i/f rather than just a sensor?
This is part of a make or buy type decision. With the right sensing technology, a system designer would interface the sensor to an MCU for use in the network. Alternative, a engineer configuring a system can find a sensor that meets the other application requirments from an industrial sensor supplier that offers the appropriate network protocol as well.
Q. is there a limitation on bus-communication capacity vs the number of sensors and particulars of sensor response times in relation to bandwidth?
Q. does the bus -communication technology contribute to the response time expected - (consideration given to real-time monitoring and safety systems backup)?
Q. You mentioned accuracy and precision, but what also of reliability and necesity for use of redundancy in sensing architecture?
Q. What functional characteristic General-Architecture are associated with Smart sensors?
Randy: What kind of sensor would you use to detect low frequency irregularities (~1/sec) on a machine with a medium frequency (100-1000/sec) "background noise" vibration?
My experience with industrial sensors is fairly old school, but after pneumatic process control. Most sensors were big hardware devices. We were just introducing "smart sensors."
Have the complete range of these old sensors been supplanted by mems devices?
@JD0001, they are safe to use, but you may get lower bit rates or drop data entirely. It may be prudent to insert some sort of data verification in to your protocol.
In an environment filled with "noise" and existing Wi-Fi, are Wi-Fi sensors safe to use? What about worries of data corruption from a noisy environment?
As far as the different wired comminication protocols, will the same physical wiring work for all? Ignoring environmental considerations for the wiring, are we looking at Coax, UTP, (Cat ?) shielded twisted pair, or something else?
Randy, you mentioned a sensor with ADC capability. I can infer that more complicated processing capabilities might be present in some of the more modern sensor packages. Is that an accurate assessment and they would be names "smart sensors"?
Question: What kind of sensor would you use to detect low frequency irregularities (~1/sec) on a machine with a medium frequency (100-1000/sec) "background noise" vibration?
Randy, how can EtherNet/IP be considered "soft real-time" when it synchronizes with much lower jitter (< 200ns) than any of the other three buses (< 1us == 1000 ns) on the Motion Control Protocol Comparison slide?
JMHO... Interrupting the presenter is a tough decision to make, but it is necessary to keep the studend in sync with the presentation. Ya gotta do what ya gotta do.
The new FireWire S1600 and S3200 (1.6 Gbit/s and 3.2 Gbit/s) devices use the same 9 conductor connectors as the old or existing FireWire S800 and S400 devices.
The battle will be with the USB-3.0. FireWire are expected to increase speed to 6.4 Gbit/s and to add additional small multimedia interface connectors.
@Lahha01 Can you see the "More Troubleshooting" link just above the "Your Post" dialog box? If so, follow it and on the bottom of the page it tells you what URL's must be unblocked by your IT department for the streaming audio to work.
Randi, in the most obvious process control applications, control optimization is not too frequent. Can you name a few applications where indirect measurements (state estimation) are necessary in the industry around us?
--Office 2007 hasn't added any thing good as far as workd, excel or
power point functionality (in my humble opinion)--
I agree totally- in addition I can't find many of the commands that I used to know, so the new versions of Ofiice are real productivity killers for me.
@ frakbishop - you may want to "measure" the motion in your apps, maybe vibration too, but generally you want to have your board to work well in vibration condition.
you must already have it on your comp...do a search 1_sensor.1ch and try opening manually (I assume you downloaded to open immediately first), then tried a second download inadvertently
I downloaded the slide deck but PowerPoint won't open it, claiming it's corrupt. I've always been able to open previous slide decks. Anyone else having this problem?
The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.
For 3D printing to make the jump from rapid prototyping to manufacturing, engineers will need to find easier ways to move products from their CAD screens to their printers.
Gigabit and PoE are two networking technologies moving ahead in tandem as industrial users power remote Ethernet devices such as IP security cameras at 1,000 Mbps over existing CAT5 cable.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 5
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.
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