Hello, has anyone done research regarding capacitive grain moisture sensors using Arduino? I need help regarding this research
Thank You
You need help with google?
Yes, but I didn't find that, that's why I asked here
you just measure air humidity inside the grain.
I think you can start with a temperature and humidity sensor. You can try a DHT11/DHT22 or any other temperature and humidity sensor. You can start recording the data for your research.
Capacitance between two plates either side of a canister of grain varies depending on the grain's moisture content.
can it be accurate?
Is the method just to enter the humidity program and the sensor is placed on the grain?
do you have the circuit?
You have to first calibrate the sensors and then compare YOUR results to a commercial device.
Try typing "grain moisture sensor" in the search field on top of this page.
Leo..
How do you do the calibration? Do you need to use methods such as regression or something else?
Can you send a screenshot?
Not for something as simple as this.
Every forum page has a "search forum" field top/right.
Leo..
I don't, but if I did, I would make many comparisons with a commercial meter.
I've tried looking for it, but nothing matches
Searching "grain moisture sensor arduino" turned up several projects.
Some used a common capacitive soil moisture sensor.
Why don't you buy a "soil moisture sensor v1.2", and start experimenting.
Leo..
I designed at least one for Protimeter in pre-microcontroller days. In the early 1980s. I do not have a design, but I guess it was a relaxation oscillator, the measuring cell a low pass filter and a simple rectifier followed by an A/D with display.
Calibration was performed in conjunction with Protimeter’s grain moisture lab. Specialists with specialist equipment.
DHT sensor will give you the temperature and humidity of the atmosphere where the sensor is placed.
Here is an Arduino tutorial on how to connect the DHT11 sensor with an ARduino. Circuit diagram and sample code are included: Interfacing Temperature & Humidity Sensor with Arduino - The Engineering Projects