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Questions tagged [transducer]

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0
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1answer
30 views

Confusion with mapping a transducer range to a different output voltage range

A pressure transducer with a range +/-200Pa has both serial and analog outputs. I'm only interested in positive pressure besides sometimes the negative pressure needed to be measured when there is ...
1
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2answers
55 views

Is it possible to suppress oscillation at reactive load (non inverting amp)

I am using a non inverting amp with B class voltage follower to drive a piezoelectric transducer (used as sonar for fish scanning in boats). I am using trains of 20 sinewave pulses (85KHz), like the ...
3
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1answer
42 views

What's the circuit diagram symbol for a variable reluctance sensor transducer?

I know I've seen the symbol before, it's something like a circle with an open triangle facing in the direction of current flow with a line through the middle. I'm specifically thinking of the ...
1
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1answer
67 views

Acoustic Emission Sensor

I wanted to use Acoustic Emission for the detection of termites. I was going through some research paper and they suggested that it can be done using an acoustic emission transducer of 60khz frequency....
1
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1answer
131 views

Voltage spikes in h-bridge inverter square wave output

I apologise if this is a repost but I couldn't find the problem anywhere else. I am trying to power an ultrasonic transducer using an h-bridge inverter design to convert arduino signal into a higher ...
0
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0answers
74 views

Help identify a water level sensor in humidifier

I have this ultrasonic humidifier that looks like this: It has a piezoelectric transducer that produces the vapor. It also has a sensor that turns it off when the water runs out. The unit now just ...
1
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0answers
40 views

Ultrasonic Piezoelectric Pulse Amplification

I am working on a project that is going to use an IC similar to the Maxim MAX35103. I have not decided on the exact IC yet, but for ease of this discussion, we will assume the MAX35103. This MAX35103 ...
0
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1answer
35 views

Current Transducer Usage

I'm just a bit confused about this current transducer/sensor https://uk.rs-online.com/web/p/current-transducers/1383472/ Datasheet: https://docs-emea.rs-online.com/webdocs/15c5/0900766b815c5532.pdf ...
0
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1answer
70 views

How to conclude the necessity for unbalanced to balanced signal conversion for this scenario?

This is a bit specific system related question about simultaneous data-acquisition for several transducers. Therefore hope you don’t mind for the long intro and the question. It would be too implicit ...
0
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1answer
210 views

Any cheap and easy ways to isolate analog signals?

I want to isolate some transducer signals. Everything I've looked up is pretty expense/requires a lot of supporting circuitry which, because of volume, is not ideal. What is the easiest/cheapest way ...
0
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1answer
85 views

Ultrasonic transducer actual bandwidth for filtering

I have a pair of ultrasonic transducers with a "Thick Resonant frequency" of 975 kHz ±30kHz according to the data sheet. I did a frequency sweep test where I could see that they performed best at a ...
0
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1answer
42 views

Confusion understanding a transducer manual for wiring

In the Setra Model 270 transducer manual the following instructions are given: Do they mean that the excitation negative terminal should be separate with the output signal's ground? And the shield is ...
1
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1answer
53 views

Why is the damping RC used in these accelerometers?

What is the damping capacitor resistor couple used for at force balance accelerometers?: Can you explain what happens as a malfunction if it doesn't exist?
0
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1answer
90 views

Ultrasonic transducer for NDT short circuit

i have bought several transducer for NDT test from some manufacturers, but before i tried them, i checked that the impedance between the positive and negative transducer just around 2 Ohm, and it didn'...
0
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1answer
64 views

Pressure transducer being read using Labview

I understand this is not a typical question for this forum, and that NI Labview forum would be better (I posted there too), but I am hoping that someone who is proficient in Labview will see this. I ...
3
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2answers
357 views

How to amplify a low Amplitude, High frequency signal from Ultrasonic Transducer?

I am working with some ultrasonic transducers, the receiver gets a signal of around 10 mVp-p at 125 kHz and for its purpose needs a gain of around 10. So far have a simple inverting OP-Amp setup, ...
1
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0answers
79 views

Transient Response Suppression

In my project i am using an ultrasonic transducer. The transducer has a high Q-factor so that it's zero input transient responses decay rate is quite low and i am suffering from that because the ...
0
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0answers
53 views

Transducer impedance decreased when Amplifier is connected

I am trying to measure beam pattern and impedance curve of a transducer from 70 to 120 khz. To get a nice plot, i have to use an amplifier(op-amp +-14Vs and Gain=14db) between a Signal Generator(Whose ...
1
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1answer
204 views

Creep on a load cell

I am working with a 50kg load cell. In the datasheet(https://www.sparkfun.com/datasheets/Sensors/loadsensor.pdf), the creep is defined by (3min)%FS. What does it mean?
0
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1answer
117 views

Purpose of PNP transistor in ultrasonic driver circuit

This question is related to my other question What is the purpose of Q2, R2, C1 and C6 in the circuit in the original question? When I remove these components from the simulation nothing appears to ...
0
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1answer
255 views

SPICE modelling output/input coupling in ultrasonic transducer driver

The real device is this. The LT SPICE model is here. The schematic of the driver part of the circuitry (omitting power supply circuitry and relay circuitry that basically switches the driver between ...
0
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2answers
68 views

Can we think of an impedance or an admittance as a case for a transfer function?

We define impedance as the complex ratio of potential (voltage) over flow (current). We can describe it as how much a system "impedes" the flow according to a potential applied to it. But wouldn't it ...
1
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2answers
106 views

How to figure out SNR of a transducer

This is a novice question. There is an accelerometer which outputs -10 to +10V voltage output. If I sample the output for constant output(accelerometer is not moving), can I say anything about ...
3
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1answer
85 views

Some questions about power supply noise and transducer wiring

A 24V SMPS power supply is used to create a +/-12V bipolar supply. This bipolar supply then powers this accelerometer transducer which converts small mechanical vibrations to amplified voltages. The ...
15
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2answers
2k views

Through-Glass WiFi Antenna

I used to install a lot of in-car UHF radios & hands-free cell phone kits. I mostly worked on trucks & commercial utility vehicles fitted with bull bars, upon which I would mount a big, bulky, ...
0
votes
1answer
388 views

High frequency Ultrasonic transducer for finer mist making

I am looking to make Mist/Fog from water using ultrasonic transducer mist maker. A typical mist making products in the market are using 1.7 MHz ultrasonic transducer to make 5 Micron size Mist/Fog. ...
1
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2answers
61 views

A question about replacing voltage outputs with 4-20mA current outputs

Some transducers have both voltage and current output options. I currently use voltage outputs with around 15m BNC cables single-ended. So they are open to interference as well. Sometimes during data ...
0
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1answer
48 views

7MHz Transducer Measuring Doppler Shift

I am currently messing around with a project I thought would be fun but am having some issues. My goal is to use a signal generator to send a wave through my 7MHz (Steminc) piezo s-configuration ...
0
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0answers
64 views

How to converting an alarm to ultrasound emitter?

I've heard that it's much more cost effective to convert alarms to ultrasonic emitters vs outright buying ultrasound transducers. How would you go about tackling such a project?
0
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1answer
32 views

Why is the graph plotted by |V0| in lvdt characteristics graph

In the transfer characteristics of an LVDT , why is the modulus of voltage taken and not just the voltage. In both cases we can see linear range so, what is the advantage of taking mod V.
1
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1answer
183 views

What does it actually mean by that a transducer has good dynamic response?

One of the basic requirements of a transducer is that it has good dynamic response. I am having trouble understanding the meaning. My textbook says: The output of the transducer should be faithful ...
0
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0answers
33 views

A question about temperature change of a transducer

This load-cell has sensitivity Cn = 2mV/V. In the data sheet the only part about the temperature coefficient is: How can I calculate the change in sensitivity for a 10°C temperature difference?
0
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1answer
34 views

How to decide pulling low on an IC?

I am using MAX1484 chip for communicating thru RS485. It is a two way communications with Receiver and Driver built in. If I am to use only the receiver part and I want to disable the driver part, I ...
0
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0answers
169 views

Pressure Transducer to complete circuit

I'm using the Adafruit Feather nRF52 to build the HIDScan sketch which essentially allows completed circuits to transmit keys over bluetooth. I have a switch that connects from pin A0 to GND, and ...
1
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1answer
52 views

Issue reading pressure transducers and getting floating value

So I'm trying to read a Honeywell pressure transducer off an Arduino Mega and I'm just getting floating values. I've tried ground the line straight to the Gnd and then I get a consistent 0 but ...
1
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0answers
134 views

Electrical power in piezoelectric transducer

This question is from the book Diagnostic Ultrasound Imaging: Inside Out By Thomas L. Szabo, regarding the power flowing into the piezoelectric ultrasound transducers. In chapter 5 (transducers) page-...
0
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1answer
66 views

Can I monitor 25A peak to peak sinusoidal current wave precisely with this Hall-Effect Sensor?

I need to monitor a current on a PCB trace. The current is in sine form and its peak to peak 25A. I need to monitor it very precisely (+/- 50 mA) because I have to issue an interrupt output when the ...
0
votes
1answer
54 views

What are the range of pressure values we receive from an ultrasonic sensor?

While trying to receive ultrasonic waves from a Sonar using a pressure transducer what are the range of values of pressure I can get. I need these values to buy necessary equipment for doing the ...
1
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2answers
121 views

Filter Design for Charge Output Transducer (accelerometer)

I am designing a low-pass filter for a charge output transducer. The filter must be passive and provide a 2nd order Butterworth response, no more than 0.01dB of ripple in the passband is acceptable. ...
0
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1answer
261 views

Unreliable pressure transducer readings

I have a relatively simple setup where I have an Arduino Mega reading a pressure transducer (transducer specs) and then I'm just watching the voltage readings over serial. It seems that I'm getting ...
0
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3answers
951 views

How to make a piezoelectric transducer buzz louder?

I am trying to make a piezoelectric transducer buzz loudly, but have so far only been able to make it create a quiet hum. I have tried using a basic amplification circuit with an NPN, but this made ...
0
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1answer
64 views

Does this circuit need any additional protection? Arduino to Pressure Transducer

So I'm powering and reading a Honeywell Pressure Transducer from my Arduino Mega board. I've got the circuit wired up as shown in the schematic below with the Excitation line from the Transducer going ...
0
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1answer
103 views

Inserting transducer model into a circuit

I'm not looking for complex explanations on transducer modeling, rather lets assume we have a very simplified transducer model of basically an R and C in series: simulate this circuit – ...
1
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0answers
103 views

Beam pattern for a linear array comprised of rectangular transducers

I am looking for the beam pattern of a linear array with uniform spacing, d, between n elements. I know for an array comprised of circular pistons it can be derived from $$\frac{1}{n}\frac{\sin[n\pi\...
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2answers
316 views

How to reverse a pressure transducer output voltage

I am trying to set up an air compressor on my truck and run it through a Ford APCM (auxiliary power train control module). It has a 5v output. The APCM has a custom throttle control input on it. It ...
0
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0answers
57 views

Build a breathalyzer like device but for testing liquid or semi-liquid subtances

As a recovering alcoholic, I know for a scientific fact that alcohol will altogether evaporate from boiling water after sufficient time, and nearly all alcohol from boiling food, which would have a ...
0
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2answers
453 views

Hbridge for ultrasonic transmitter

I'm trying to build an ultrasonic transmitter circuit. The datasheet specifies 20V peak-peak for the ultrasonic to operate at its maximum power. However I'm limited to only using a 9V supply. What I ...
0
votes
1answer
191 views

Measuring current transducer output - differential or single ended?

I'm designing a front-end for an ADC that will be measuring the voltage of a hall effect current transducer. I have been reading up on differential vs single-ended measurement, and have become a bit ...
0
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1answer
49 views

PT100 weidmuller transducers output

while looking for a PT100 transducer from weidmueller, I faced two types of output current: 4...20 mA and 20...4 mA . Why is it like this? what's the difference between 4...20 mA output and 20...4 mA ...
0
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3answers
773 views

Line In Amplifer to Piezo Help

I am trying to build a very simple amplifier type device to power a 4ohm 150 watt piezo tweeter. I am getting my signal from an mp3 player and then want to use a voltage source, 9-20 volts, to ...