How to measure signal from a piezoelectric sensor?

AI Thread Summary
To measure signal from a piezoelectric sensor in a swallowed pill, detecting frequency changes without physical electrical connections poses a challenge. The proposed method involves monitoring frequency shifts caused by ammonia adsorption on the sensor's surface. Ultrasound could potentially be used for detection, although specifics on implementation were not discussed. The concept draws inspiration from existing technologies like the Heidelberg PH pill, which transmits data via radio waves. Exploring alternative sensors for this application may also be beneficial.
jen0leb
Messages
6
Reaction score
0
Hello, I'm not an electrical engineering student so please bare with me...
anyways if let's say you swallow a pill containing a piezoelectric sensor to measure adsorption of a molecule in the stomach how can you detect the changes in frequency? if there is no "physical" electrical connections with the outside. can it be detected using ultrasound? and how?
and if you think I'm better off with another type of sensor for this type of measurement, I'm open for ur suggestions..
thanks
 
Engineering news on Phys.org
The Mythbusters used a pill thermometer to take their core body temperature from inside their body, and it communicated with a receiver with radio waves.

I don't know if you'd be able to design something like this though.
 
jen0leb said:
if let's say you swallow a pill containing a piezoelectric sensor to measure adsorption of a molecule in the stomach how can you detect the changes in frequency?

The changes of frequency of what, exactly? How is the biochemistry meant to affect the piezo sensor?
 
well I'm trying to measure the concentration of ammonia so when it adsorbs on the surface of the sensors it causes the frequency changes Δf because of Δm applied. i got this idea from the heidelberg PH pill that gives out the measurements by radio transmission, and i was hoping that there's a way i can do that with a piezoelectric sensor. :)
 

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »
Thread 'Electromagnet magnetic field issue'

Thread 'Electromagnet magnetic field issue'

Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
View full post »

Similar threads

Get electrical signal of a piezoelectric with ultrasound
Replies
7
Views
2K
Challenges and Solutions for Measuring Microamp DC Current with Hall Sensors
Replies
8
Views
2K
Amplifier for piezoelectric sensor, OP Amp circuit
Replies
6
Views
5K
Why does my sensor show "gaps" every 16 units of resolution?
Replies
6
Views
1K
Don't know how to make an ultrasonic sensor circuit....
Replies
1
Views
2K
Buying/building piezoelectric sensors and actuators?
Replies
1
Views
2K
Trying to get raw signal from SRF02 ultrasonic sensor
Replies
1
Views
2K
Phase shift measurement using phase modulated signal
Replies
1
Views
1K
How to reduce the current of a signal by an exact amount?
Replies
24
Views
5K
How can I connect sensors in a household without a laptop or large controller?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top