Questions tagged [transducer]
A transducer is a device that converts energy from one form to another. Use this tag for questions about transducers that convert to or from electrical energy.
181 questions
0
votes
1
answer
48
views
Driving Piezo Using Unfiltered Sine Wave PWM
Can piezoelectric components like Langevin transducers be driven using unfiltered near sine wave PWM? If so, what are the upsides / downsides? Where can I learn more?
As an example, I'm attaching ~...
- 257
3
votes
2
answers
181
views
Ultrasonic sensor with a Zener diode for an intrinsically safe system
I am currently designing an ultrasonic sensor unit. One of the requirements is that the ultrasonic sensors located in the hazardous area need to be intrinsically safe. This requires placing a Zener ...
- 131
1
vote
0
answers
38
views
Converting ultrasonic power supply from 110VAC to 230VAC
I have an ultrasonic cleaner bought in US, so made to work with 110V, but I would like to use it in EU, so with 230V.
The power supply in the cleaner is pretty simple, so I tried to understand how it ...
- 113
1
vote
1
answer
69
views
Load cell mathematical model
I'm studying a solution for a weight measuring system that's affected by enviroment vibration - a load cell fixed on a "shaky" frame. My first thought was to use a 3-axis accelerometer (or ...
2
votes
2
answers
312
views
Is there anyway to estimate the time average power without knowing the power factor?
I am driving a transducer with a function generator connected to an amplifier. I need to work out the time average power entering the transducer for safety reasons. I understand it can be calculated ...
1
vote
1
answer
236
views
Matching circuit for piezo transducer
I am at the stage of designing a system that match impedance of the power output (half-bridge) to a piezo transducer operating at 1MHz (Max 60W of power). I calculated the piezo parameters from the ...
- 292
0
votes
4
answers
98
views
Ultrasonic flow sensor to measure water volume [closed]
I’m building a project which displays the total volume of water which has passed through a pipe. I want to use an ultrasonic flow transducer https://www.digikey.com.au/en/products/detail/audiowell-...
- 21
0
votes
2
answers
121
views
How does this ultrasound transmitter work?
Can anyone explain each component and why it is used?
Why Q dash used instead of Q from IC 74121?
why .1 nad 47 microfarad used?
how the 0 to 9V and 0 to -100 V obtained?
reference site
https://www....
- 11
1
vote
1
answer
61
views
Will this electric guitar wiring scheme be noisy?
I want to wire my guitar using two SPDT switches for my pickup selector. This is so I can have four sounds: lower, upper, both in parallel, both in series. I'm concerned that when it's set to use ...
- 13
0
votes
2
answers
151
views
Sinusoid Amplitude for an Ultrasonic Transducer
I want to design a driver for PKT40A from ThorLabs. The spec sheet indicates "Power (Typical, Instantaneous @ 3 kV)" of 700W, but the "Impedance at Resonant Frequency" of <12 ...
- 257
2
votes
2
answers
184
views
BJT Zero-Crossing Detector for 40kHz Ultrasonic Signal - Distortion & Receiver Issues
General Information About the Project
I am trying to design a zero-crossing detector circuit for convert the sinusoidal signal from an ultrasonic transducer to a square wave. Here is the image of ...
- 121
3
votes
1
answer
640
views
How to determine voltage level of the ultrasonic transducer?
I am designing the generator for an ultrasonic transducer for a cleaning system and I am not sure how to set the output voltage level.
I measured the voltage level of the existing products, peak ...
- 33
0
votes
1
answer
73
views
Vibration transducer to ADC of STM32
I'm trying to design a circuit to read the vibration value from a vibration transducer and I need some help with it.
The signal from the transducer has DC component of 12 volts and a varying AC ...
- 3
1
vote
1
answer
65
views
Signal conditioning for a current transducer
I am using a current transducer (LPSR 15-NP) to measure the current that is flowing through my AC servo motor powered by my SVPWM PCB. I have currently implemented an open loop control to the motor ...
0
votes
1
answer
115
views
How to lower down output power of low power ultrasonic transducer?
I'm currently using a low power ultrasonic transducer for micro machining on ceramic. Kindly refer below for the spec of the low power ultrasonic transducer,
Output Power = max 2.0W (can be adjusted ...
0
votes
1
answer
79
views
Help testing Pressure Sensors
I have a few ME600 Metallux sensors that I harvested from some discarded products. I want to build a project with these but would like to verify they work before getting too far. From the datasheet ...
- 1
0
votes
1
answer
137
views
Transducer for ultrasonic lens cleaning
I recently discovered TI's ULC1001 driver chip for ultrasonic lens cleaning. I'd like to try this in my next project, but I'm not sure what transducer to use.
For an application like his, are ...
- 27.6k
0
votes
1
answer
302
views
How do 4-20 mA transducers work?
I am quite new to the instrumentation of electronics. I have noticed that most transducers that are used in the industry only use 2 pins, where it is usually marked with a positive 24V pin and an ...
- 5
1
vote
1
answer
161
views
How to amplify signal enough to make a Langevin transducer vibrate?
I'm a little out of my zone of mechanical engineering here, so I'll need your help.
Up to date, I got the right frequency (40 kHz modulated for a 200 Hz low frequency) coming out of my function ...
3
votes
7
answers
709
views
Ability of transducers to produce sufficiently amplified signal
Transducers are responsible for conversion from one a form of natural signal into electrical signal. Example - heat variations into electric voltage variations.
In the book Microelectronic Circuits ...
- 39
0
votes
2
answers
91
views
What cable is this, and what is attached to the end? [closed]
I have a question regarding the cable in a red square, namely that green thing.
This is a video from YouTube and I am trying to recreate the same. I want to connect the same type of transducer to the ...
0
votes
1
answer
155
views
How can I use 16mm 40kHz waterproof ultrasonic transducers to measure distance?
I have these 16mm 40kHz waterproof ultrasonic transducers：Manorshi MSW-A1640H12TR.
I am wondering how to measure distance with these transducers. I desoldered the non-waterproof transducers from a US-...
0
votes
1
answer
78
views
Why doesn't a guitar pickup's top and bottom cancel itself out? [closed]
A guitar pickup is a coil of wire with some magnets in the middle. The magnets magnetize the steel guitar strings. When those strings a strummed, they vibrate, and since they're magnets they induce a ...
- 109
0
votes
1
answer
1k
views
How to figure out the current drawn by a 40kHz ultrasonic transducer?
I have some 40kHz ultrasonic transducers (the same type as which you find in the common Arduino ultrasonic distance sensors.) All information comparable to a datasheet I got was:
I don't get how to ...
- 317
2
votes
2
answers
324
views
Differential capacitive transducer
I would like to design a differential capacitive transducer to measure the capacitance change in an accelerometer.
I cant seem to understand, how to demodulate the signal and keep the actual DC value....
- 43
1
vote
1
answer
210
views
Hall effect sensor output
I am planing to use an LF 510 -S / SP15LEM current transducer.
I am expected to sense -300A to 300A. What is the output of the Hall effect? Is it mA or mV?
If it is mA I will need a resistor to have a ...
- 11
-1
votes
1
answer
239
views
Accuracy Class and Full Scale
I am using this formula to calculate the class of an instrument:
\$\text{Accuracy Class} = \frac{\max{\text{(Absolute Error in Range of Measurement)}}}{\text{Full Scale Value}}\$
The question is, FSV ...
0
votes
1
answer
76
views
Large signal current measurements of a loudspeaker
I'm trying to work out a method of measuring electrical current through a loudspeaker load for voltages in excess of +-20 V to be read by an audio interface - I need to scale down both voltage and ...
- 1
1
vote
1
answer
382
views
VCO generating a lot of electrical noise, picked up by ultrasonic transducer
In my setup, I have a VCO CD4046 Phase Locked Loop IC generating a square wave, and an ultrasonic transducer set that transmits and receives that setup. You can imagine it looking something like this.
...
- 913
0
votes
1
answer
211
views
Offsetting an ultrasonic receiver's signal for an amplifier with a floating ground
I have an ultrasonic receiver that I'm putting through an amplifier. I've created a floating ground for the amplifier (because I want to pretend having a negative voltage supply). However, to achieve ...
- 913
1
vote
1
answer
173
views
What does 'Output load (pull up or pull down' mean on a datasheet for a pressure transducer?
I am setting up a sensor network to monitor a few things including pressure. I am going through the following datasheet, honeywell sensor, and it has a field called 'Output load (pull up or pull down)'...
- 27
1
vote
3
answers
721
views
Determine how to drive and read an unknown three wire pressure sensor
This three-wire pressure transducer pinout, drive type, and electrical specifications are unknown. It should be a typical industrial transducer. I have tried assuming it is an amplified device with a ...
- 161
0
votes
1
answer
98
views
Spark generator current limiter
I am using a spark generator for electrical discharge machining and mounted a current transducer to read the current value of the arc between workpiece and electrode.
When the electrode gets too near ...
1
vote
2
answers
521
views
Why do ultrasonic cleaner transducers usually have two piezoelectric discs (or rings)?
Most of the diagrams for them I've seen show that. Is it for the purpose of amplification, or some other reason?
- 517
1
vote
1
answer
585
views
Ultrasonic transducers driver review (25 kHz, 150 Vp-p)
Transducers specs:
Resonance frequency = 25 kHz +/-1 kHz
Maximum driving voltage = 150 Vp-p
Capacitance = 2.4 nF +/-20%
Proposed driver circuit and simulation:
Seven transducers are driven for a ...
- 2,632
0
votes
1
answer
73
views
Component identification - ultrasonic transducer
We have a Chinese made ultrasonic transducer, 120kHz approximately, 25mm x 25mm dia.
It has three wires - red, green and white. The body is PVDF
We have determined that the red and white are used to ...
- 14.3k
0
votes
2
answers
165
views
Can this buffer provide adequate current to drive an ultrasonic transducer?
I am using a BUF634P Buffer (Datasheet) to drive a wideband ultrasonic transducer. The impedance of the transducer varies with frequency and reaches a minimum X = 100 Ω, while its resistance (...
- 1
2
votes
1
answer
145
views
What sort of iron rod should I use in a magnetostriction oscillator?
I'm trying to make a magnetostriction oscillator at home. Here is the circuit diagram:
1 DC Power Supply
2 Ferromagnetic Core (Iron)
3 NPN Bipolar Junction Transistor (2N2222)
4 Capacitor C
5 Primary ...
1
vote
2
answers
1k
views
How to build a circuit which allows a piezo transducer to act as both a transmitter and receiver
I am a student and am currently working on a project where I require a piezo transducer to act as both a transmitter and receiver. I am finding it difficult to build a circuit where a pulse can be ...
- 33
1
vote
0
answers
130
views
Is a dsPIC33 suitable for creating a 40 kHz signal with 16 bits of resolution as input for ultrasonic transducers?
I'm trying to build a parametric speaker (Directional speaker) that could output a somewhat decent and high-quality sound hence why I'm aiming for a 16-bit resolution.
The audio signal needs to be ...
- 161
0
votes
1
answer
79
views
Cost-effective current monitoring solution for PIC
I'm in search of a cost-effective solution for monitoring the current draw in a resistive heating element using a PIC.
All of the Hall Effect sensors that I've looked into seem to output the same AC ...
- 23
0
votes
2
answers
469
views
Read 4wire pressure transducer via a differential amplifier
I have been trying to read a 4wire pressure transducer (M3021-000005-01KPG) with a microcontroller, but problems keep arising. First of all, I realized that the signal (0-100 mV) is differential, ...
0
votes
0
answers
326
views
Can I use Op-Amps to drive a ultrasonic piezo transducer at 200kHz
I’ll admit I’m not the most knowledgeable guy when it comes to electronic circuits, so I thought I’d ask before breaking anything.
I’m looking to drive a piezo transducer using a 200kHz sine wave. The ...
3
votes
3
answers
1k
views
Is a potentiometer an actuator or sensor?
While I was taking notes I get confused by the component named "potentiometer", I don't know in which category I should place it.
If I'm correct the definition of a sensor is broadly "a ...
- 63
1
vote
0
answers
119
views
How to match Transformer output Impedance for Ultrasonic Cleaning Transducer
I have a transformer outputting the 240VAC 40kHz. The Transducer is 50W, 4100pF, 10-20 Ohm at resonance, ~40kHz resonance)
The Secondary of the transformer is 12mH.
I am trying to match the impedance ...
- 13
0
votes
2
answers
118
views
TRT-25 and Arduino Uno
I need help on a project I am working on.
We are trying to integrate a reaction torque sensor and I am having a hard time deciding how to go about it.
Previously I assumed that like my load cell I ...
- 1
3
votes
1
answer
541
views
CW Doppler probe for fetal doppler and blood flow velocity
I am currently working on a microcontroller based project to measure the blood flow velocity using ultrasound doppler.
I have purchased two Spengler 8 MHz continuous mode probes in order to measure ...
- 145
1
vote
1
answer
444
views
How does pulser-receiver circuit work
I want to set up an experiment exactly as given in this data sheet for the T/R switch that I recently bought (the MD0101):
Every pulser receiver circuit that I’ve found neglects to address what ...
- 177
0
votes
1
answer
579
views
Reducing resonance in a piezoelectric ultrasonic transducer
I am using a piezo transducer to launch an ultrasonic pulse in air, at a frequency of 125kHz. A picture of the received waveform is attached. My question concerns how I can (electronically) limit the ...
- 14.3k
1
vote
1
answer
149
views
What is limiting high frequency ultrasound from being high power
This is mostly just our of curiosity and I feel like I may be missing something basic, but what is limiting ultrasond transducers in the range of 500kHz-MHz from not outputting higher power like the ...
- 11