That's an interesting biological problem.Originally Posted by jrandom
We beeped at some clown on a pushbike the other evening.....
L-Plate Rider
That's an interesting biological problem.
We beeped at some clown on a pushbike the other evening.....
Aim for the moon; even if you miss you'll land amongst the stars
(Anon)
e mare libertas
Biological?
I bet he gave you the learn through the next intersection, though.
kiwibiker is full of love, an disrespect.
- mikey
L-Plate Rider
A bum on a bicycle does your head in. Some (not me, of course) may suggest the similarity between your head and your bum..... (but not me of course)
Yes, while failing to indicate and completing an inconsiderate lane change or three.....I bet he gave you the learn through the next intersection, though.
Aim for the moon; even if you miss you'll land amongst the stars
(Anon)
e mare libertas
I have been told that they're both gorgeous, but I just figured the flatterers were after my money.
You presumably have no need of my money.
He probably had a reputation to live up to.
kiwibiker is full of love, an disrespect.
- mikey
Full of Titanium go-fast bits!
Dont know how linear the output is, this is the loadcell :
http://shop.totalcomp.com/catalog/do...ag_5-100kg.pdf
A-D has span and zero calibration options - I don't have the equipment to set them tho so they remain as factory set. Unit is a Advantech Adam 6017 :
http://www.advantech.com/products/AD..._1-2MLBFW.aspx
Your thoughts would be appreciated
"And, look, the luscious and fecund fronds of the Silver Fern has given brilliant birth to a stupendous fruit! A red Hondaberry, desposited by a lesser known species of Plonker Gittus Maximus Idiotus."
Cyborg Biker
Range to target is...
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Do it 1st thing in the morning CheersDont know how linear the output is, this is the loadcell :
http://shop.totalcomp.com/catalog/do...ag_5-100kg.pdf
A-D has span and zero calibration options - I don't have the equipment to set them tho so they remain as factory set. Unit is a Advantech Adam 6017 :
http://www.advantech.com/products/AD..._1-2MLBFW.aspx
Your thoughts would be appreciated
Trainer wheels optional
Without looking at the data, you need to get a voltage generator within the range, and input this to get the algorithm correct with respect of the input across the full range. If the input is not strictly linear that is not much you can do, but zero and full range to be correct.
From there you need the real world and place a known low weight, and zero span that to correct displayed weight, then place a high end known weight, use span to correct that weight display. Back to low weight re-zero to that known, then high end weight using span adjust.
Continue in that order till both known weights are displayed correctly by the algorithm. Realistically the low end weight needs to 10% and high end 80%.
Basically this linearises the input between weights.
I do a lot of PLC programming for speed weights, acceleration, pressure, PID loops etc.
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Sorry, when you start calibrating the real weights, you disconnect the voltage (or analogue generator, and hook in the weigh scale input) you prob guessed.
IANZ labs is the calibration standard mostly certified)
Douching my Simuloid
I can count to potato!
Scotsman on a German
Dude has a value within a range. Wants to express the equivalent value within a different range.After 10 pages could someone please be courteous enough to summarise the problem and answer to it
Dead easy.
Example for those not farting around with hexadecimal shit and stuff. A year has 365 days, 52 weeks and 13 lunar months.
Lets pick day 200 out of 356
It is also week 28.49 out of 52
And it is also month 7.12 out of 13
Piece of piss
In space, no one can smell your fart.
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Before i get kicked off my PC, load cell will strain gauge will be in millivolts, usually hooked up to an amplifier card, that usually outputs 0 to 20 milliamps or 0 to 10 volts. That is what normally is the input to A to D input, are you using the milliamps direct input.
Full of Titanium go-fast bits!
Correct, there is no load cell amplifier, summing box, or anything of the sort.
Loadcell outputs range of 0-30mV, AD inputs take +/-150mV - not the pefect match but good enuf
"And, look, the luscious and fecund fronds of the Silver Fern has given brilliant birth to a stupendous fruit! A red Hondaberry, desposited by a lesser known species of Plonker Gittus Maximus Idiotus."
Trainer wheels optional
Provided you can input directly the load cell input it is ok. If the algorithm you have written calculates the O KG and 100 KG correctly as inputs, all is good at that point. Zero & span calibration removes any load cell irregularties.Correct, there is no load cell amplifier, summing box, or anything of the sort.
Loadcell outputs range of 0-30mV, AD inputs take +/-150mV - not the pefect match but good enuf
Full of Titanium go-fast bits!
Yes i think the biggest source of error in this system will be the excitation voltage supplied to the loadcells. It can take 10-15v excitation. outputs 2mV/Vex so I fed it 15v. Power comes from a cheap 24v din rail psu via a DC-DC converter outputting 15.09ish volts.
I need a way of scaling the 15v power supply to a linear 0-10v signal i can read with the AD, and dynamically calculate the algorithm based on the correct excitation voltage as read every sample time.
Isn't anyone going to ask me what its for?
"And, look, the luscious and fecund fronds of the Silver Fern has given brilliant birth to a stupendous fruit! A red Hondaberry, desposited by a lesser known species of Plonker Gittus Maximus Idiotus."
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