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pls help me to build water level meter.the one i made uses 5 probes for empty,quarter,half and full.Now a want a better design.can i use uvison and simulate something. what
start by keeping your pc and uVision far away from the water...
Not before you've done some thinking about what you actually want to simulate!
What are your requirements for this meter?
In what way(s) must it be "better" than your existing meter?
In other words, what is "wrong" with the existing design?
One simple design is to use a potentiometer and an arm with a flotation device. That will give you a continuous measurement.
You can also build a capacitive sensor that measures hwo much water you have in a pipe. Or you could use an ultrasound microphone and measure the time of the sound returning after being reflected by the water surface. You could also use a web camera and perform image analysis of how high the water reaches on a wall or stick. There are a number of other options possible too.
There are many alternatives possible. Use your imagination, and then sit down and figure out the mechanical, electrical and programmatic consequences of the different solutions.
I recently designed a simple and fully functional water level detector for air conditioner water drip trays in computer rooms. It uses stainless steel contacts, a simple mosfet detector driving another mosfet and relay combo. I feed 12V to one of the contacts, via a 10K resistor, the other contact, when water is present, turns on the mosfet, fires the relay, giving an alarm. I see no reason why the same circuit couldn't be applied to multiple level/trigger points.
Steve
He probably already has a similar solution. Since he did not specify what he meant with "better", I made the assumption that he is interested in a continuous measurements, instead of having fixed detect levels.
.. go to a junk yard and get a gas level sensor from some car. This is the very thing Per suggest.
Erik
Per Westermark's suggest is correct. i think the capacitive sensor is easy to do. when water deep, the capacitive value will large. use this capacitive to build a RC oscillator, then measure this oscillator output's frequency, you can know how deep the water is. you need make a Good insulation PROBE pair.
The capacitive sensor is not easy.
If you want any sort of accuracy across temperature, you need a reference sensor (compensator) to determine the specific gravity of the fluid.
The hardware is going to be very sensitive to interference and stray capacitance because the probe will likely have a very small capacitance, in the pF range.
I'm not sure about the stability of an RC oscillator, I think capacitive fluid level sensors typically use a capacitance bridge to determine the value of the unknown cap. This type of system is typically used in larger aircraft fuel quantity measurement.
ND
I did something similar with a differential pressure sensor and a pipe connected on the sensor on one side with the other side in the water. You litterally measure the column of water. It worked very well.
Hi U ALL!
I'm looking for FASTEST encrypt/decrypt AES-128 C algorithem for family.....Plez no delphi or FML or other
Can anyone help me?
thank you all!!!!!!!!!!
manuel englais (Deeesef Pro)
1) Why do you think a 8051 thread would supply source for Delphi? Would 8051 sound like a good processor for trying to run Delphi?
2) Exactly how do you think AES relates to measuring the level in a water tank? Using the ripples on the water surface for the random number generator when doing the initial key exchange or possibly for the generation of the keys???
Can we have more insight into the dimensions of the water vessel to be measured?
Do you want to go with a simple expansion to 8 probes, or would a float and potentiometer be appropriate?
Perhaps ultrasonic rangefinder to detect depth to water?
Probe that changes capacitence as the water level increases?
At the extreme, a lovely woman with a tape measure. Pleasant to look at and voice output.
Many ways to approach this, but we need to know more details of the application first.
Unfortunately, that seems unlikely - the OP seems to have lost interest.
:-(
"Unfortunately, that seems unlikely - the OP seems to have lost interest."
Google does not show any cross-posts, but most forums don't get scanned by Google. Not impossible that the OP did get a better answer - or a full solution - from some other site.
Which would tend to make him lose interest in his other thread(s)...