Go Down

Topic: MR rotary displacement sensor (Read 747 times) previous topic - next topic

davidbrowne

I have purchased the following MR rotary displacement sensor, and I was hoping someone could help me interpret the data sheet:

http://www.farnell.com/datasheets/103843.pdf

I am using the HMC1512 which has the larger angular range. Does the diagram below indicate that the sensor contains the circuit or that I should wire up the chip legs into the circuit shown? If the latter, where do I input power and output a signal?



Thanks alot.


johnwasser

Connect VBRIDGEA to +5V and GNDA to Ground.  OUT-A and OUT+A will then give you a voltage of about 60 millivolts times the sine of twice the angle.  Similarly for bridge B you will get the cosine of twice the angle.  With those voltages, and some signal conditioning, and some math, you should be able to determine angles in a range of +90 to -90 (half a rotation).

If you want to sense an angle you might be better off using a magnetic rotary encoder like the AS5040 which will give you a digital output:

http://www.austriamicrosystems.com/eng/Products/Magnetic-Encoders/Rotary-Encoders/AS5040
Send Bitcoin tips to: 1L3CTDoTgrXNA5WyF77uWqt4gUdye9mezN
Send Litecoin tips to : LVtpaq6JgJAZwvnVq3ftVeHafWkcpmuR1e

Go Up