Views : 617,312
Genre: Education
Date of upload: May 2, 2023 ^^
Rating : 4.969 (214/27,511 LTDR)
RYD date created : 2024-05-05T20:51:55.320935Z
See in json
Top Comments of this video!! :3
I live in Seattle. A few years ago, there was concern about the integrity of the West Seattle Bridge. They shut it down and did an extensive overhaul. Prior to re-opening, they tested it. The engineers put numerous sensors on the bridge, and drove 12 loaded 80,000lb trucks onto the bridge and measured the bridge's response using the sensors.
333 |
In the sector of telecommunications, we use an instrument called TDR (time domain reflectometer) which sends an electric pulse in a wire and check the returns from that pulse, to measure at what distance from the test equipment the fault is located.
This test equipment is similar in principle to the sensor you showed in the video, but the frequency is higher and the domain is different (time instead of frequency) but the methodologies are similar.
This is a very nice video - I begun my formal studies - a lifetime ago - specialising in "Transducers"; the devices have now been revolutionised because of the MEM technology, but the principles and the designs stayed the same.
Thank you for the great video,
Greetings,
Anthony
49 |
I am a mining engineer specializing in rock mechanics. Instrumentation is important but much more challenging in a deep underground mine as the material is dis-continuous, heterogeneous, anisotropic, non-linear, and subject to plastic deformation. Point sensors can provide mis-leading information as they become highly dependant on local conditions, most of which cannot be accurately defined. We also use Geokon for most of our instrumentation.
Our best tool is often the micro seismic system from dozens or even hundreds of sensors collectively working together to collect and compile rock noise data due to fracturing. Despite being a “remote” sensing approach, there is a lot of detailed local understanding of performance and conditions that can be extracted.
72 |
i really enjoy your videos. My wife is a civil engineer that deals mainly with storm water mgmt and stream restoration. After watching your videos, i can actually have conversations with her about her work and understand (albeit at a rudimentary level) what shes saying. Thanks so much for these and please keep them coming! I've got a lot more learning to do.
87 |
Not exactly the same thing, but this happened when I was working for a large elevator company as a young draftsman about 50 years ago. The R&D Group was tasked with redesigning the escalator frame to try to reduce the number of welds to make the fabrication less expensive as the current fabrication required "weld all around". The goal was to produce a frame with a minimum of welds as determined by the engineer's calculations. The new frame would be set up a series of strain gauges and loaded up to test the structural integrity and add welds as required.
This was all preCAD so I spent about a three weeks learning and adding weld symbols to the weldment detail drawings and having the engineers check it and make some changes as required.
It turns out that the contracted fabricator's welders weren't certified so not understanding the weld symbols, they just welded all around, just to be safe! Needless to say it pretty much doomed the project and a series of lawsuits followed. I wound up leaving the company about a month later for what turned out to be a very interesting 36.5 years at a local machine design and fabrication company.
13 |
I worked in a watermains flowmeter project: we install lots of flowmeter and pressure logger at the watermains, to monitoring the initial pressure and Flowrate of each watermains, and send those data to server for inspection everyday.
While some watermain have non-stop flow data even at mid-night(which normally nobody use water) we realize that there is some leakage after that flowmeter, thus we could carryout a faster inspection/repair/exchange activity of those leakage pipe.(We don't need to checkthe water supply zone entirely)
Sensors is really good
73 |
Great video. I was the engineer of record for a number of state owned dams. We routinely used piezometers, inclinometers, crack meters and other instruments to measure performance of earth dams and their concrete components. I used to enjoy observing trends in the data that correspond to things like changes in reservoir elevation. You start to learn how the infrastructure performs under different conditions, allowing you to spot potential issues.
4 |
I don't know man, something about this video is just so magical. Your demeanor, the experiments, graphs, games, information, everything about it just comes together so beautifully. It's like the perfect culmination of everything you've been doing and improving on with your channel.
Practical engineering at its finest, and I mean that in more ways than one
17 |
0:50 small correction: The bridge builder can try again.
it's only those who USE the bridge who don't get a second try...
7 |
I worked for a summer installing monitoring equipment for a wetland restoration company. We put finely perforated PVC pipes in the ground 1-2M deep. Next we put two small pressure sensors into the pipe: one was dangled at the very bottom, and the other was above the ground on the top to gather atmospheric pressure data. They took a reading once an hour for a year and then the data was downloaded. By knowing the density of water and the atmospheric pressure above that water we could generate a very nice plot of how the water table was fluctuating at that well. By installing 6 wells or so in strategic points at each site we could get a pretty good map of where the water was going underground through that wetland area, how much water was being absorbed into the ground, and (when correlated with weather data) how upstream conditions affect the wetland water table and how long the wetland held water (slowing it down from all rushing downstream at once) after a rain storm.
12 |
@PracticalEngineeringChannel
1 year ago
🏗 Did you know I wrote a book? There are still some signed copies left at store.practical.engineering/ 🪒 Look forward to your morning routine with a Henson razor (Code: PRACTICALENGINEERING for a free pack of 100 blades): bit.ly/3CWiWJP
100 |