Questions tagged [transducer]

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What methods are there to calibrate force sensors?

I have a DIY force sensor made from velostat in a voltage divider - Arduino configuration outputing voltage to a display from an applied force to the sensor. I'm looking for sources / books / pdfs / ...
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1answer
61 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 ...
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2answers
50 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, ...
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34 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 ...
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3answers
588 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 ...
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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 ...
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2answers
25 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 ...
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97 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 ...
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1answer
35 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 ...
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1answer
61 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 ...
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1answer
74 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 ...
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3answers
131 views

ADC input filter design for DC input signal

My plan is to use an ADS1115 ADC to read a low impedance 0-5V output signal from a level transducer. The ADC data sheet gives guidance for ADC input filtering. This data sheet, and even other input ...
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Parallel Resonance in Ultrasonic Transducers (Langevin)

I am working on a power-supply for ultrasonic welding machines and want to drive the transducer at its parallel resonance. The Butterworth-Van Dyke model paramters are : L = 24.73e-3; C = 1.14e-9; Cos ...
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60 views

Pressure to current conversion

I was trying to convert the pressure values (in psi) into 4-20mA current. The range of pressure values I have chosen is between 0-10Psi. But according to the link given below the pressure from 3-15Psi ...
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35 views

Requesting wiring feedback - Arduino/ESP32 solenoid/transducer, temp probe

2 questions: Can you please tell me if this circuit wiring is correct for the 3 sensors I am trying to connect to my ESP32? Is there a risk for EMI using the ethernet cable with these sensors/...
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1answer
57 views

communication via ultrasound

I want to communicate simple requests and ids over ultrasound. To do this I need to modulate a message onto a 40kHz carrier to drive a ultrasound transducer. Here you can find a simulation of what I ...
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1answer
39 views

How to measure the voltage over a transducer? aka how to measure ultrasound

I want to measure ultrasound. For this task I bought a sensor, and an instrumentation amplifier. Apparently it doesn't work the way I thought because when I test it with a sample 40 kHz wave as input ...
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39 views

Understanding the workings of an ultrasonic sensor

I am trying to simulate an ultrasonic sensor using a ray-based approach. For that, my current process can roughly be described as such: approximate wavefront using rays that mimic the shape of the ...
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1answer
73 views

Battery powered 4-20mA sensing application

I have a base system that runs on 3-AA batteries which it regulates to a system voltage of 3.3V. I want to interface that system to measure a 4-20mA sensor. For the sake of argument, lets say that ...
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1answer
667 views

How to simulate Magnetic Transducer Buzzer (SMT8585-03H03LF) in LTspice- any model available?

I am adding a Magnetic buzzer into the design. Buzzer part number is SMT8585-03H03LF from Bestar electronics. Below are the specifications for quick glance. Is it possible to get a LTspice model for ...
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1answer
168 views

How to read the following datasheet of a sensor?

I wanted to write about static and dynamic characteristics of the Honeywell pressure 19mm transducer. I found my sensors datasheet but could not find the following characteristics mentioned in the ...
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2answers
44 views

Questions about a wiring diagram of a transducer

I have an old current output wind-meter with the following diagram: Unfortunately there is no online documentation about the device so I had to take the above photo. I'm curious what could be the ...
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2answers
174 views

Are ultrasonic Tx/Rx pairs really just the same sensor?

I want to retool the classic HC SR04 rangefinder to be able to do ToF gas flow sensing. I need to be able to do ToF on a column of air in both directions, so it benefits me to be able to use the ...
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1answer
84 views

Ultrasonic transducer circuit

Can someone explain how these work ? I want to make my own ultrasonic bath, but I can't find any useful specs. Do I need some specific circuit to run them or it's just 'plug and play' ?
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1answer
158 views

How can I electronically generate a signal similar to the one produced by striking a piezo?

I feel like this is a bit of an unusual request so I'm having a hard time figuring out how to research it. My question is: is there some way that I can use an Arduino to programmatically generate a ...
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2answers
78 views

What are the components of this sensor? [closed]

Attached is a schematic that looks like an accelerator or a combo sensor with plenty of inputs/output. Can you please assist in helping point out the pull up resistors, voltage regulator, and any ...
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1answer
339 views

How to determine LVDT sensitivity?

I performed an experiment using an LVDT where I used a generator voltage of 4.84V. I determined the secondary voltage at the beginning position, obtaining 2.48V and at the end (displacement os 22.5 cm)...
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1answer
51 views

wiring Tamura 4 pin hall effect current transducer to differential daq

How do i wire a 4 pin hall sensor: 200A model below https://www.mouser.com/datasheet/2/397/L03SXXXD15-469349.pdf I don't understand the wiring schematic below I currently have +15 to pin 1, -15 to ...
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1answer
99 views

Signal lines from transducer made common by op-amp

I am trying to amplify the difference between signal lines off of a Wheatstone bridge based force transducer. I've wired up an LM358N Op-Amp as shown below in a differential amplifier. With R1=R2=...
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1answer
118 views

What type of ultrasonic transducers are used in medical ultrasound devices?

When I search on DigiKey for ultrasonic transducers, all I get back is the circular transducers that are sold for the various DIY projects. i.e. the picture below: However, the "medical" ultrasound ...
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1answer
199 views

What happens to current transducer if the line it is attached to short circuits?

I am using a SCT013-30 current transducer to measure current to an AC line. I hook it up to an ADS1115 16bit Analog Digital Converter. I would like to know what happens to the signal when the AC line ...
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62 views

Magnetic sensor preamplifier using op07

I am using this circuit to amplify a sensor signal (220mV p-p) to about 5Vp-p and measuring by microcontroller ADC: When I connect the input signal, the input voltage level goes up (changes from ...
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1answer
37 views

How to properly place AC current transducer sensor in the circuit

Hello i am going to setup current sensor like this (datasheet) in my home, and would like to know where is it proper to put these sensors in the circuit. Consider the two setup below: rent ...
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1answer
54 views

ensuring transducer (transmitter) and receiver polarity

I am trying to implement a simple phased array of 7 transmitters rated 40 kHz. I have a few receivers to measure the acoustic field generated to validate if it works. What is a simple way to measure ...
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1answer
84 views

Reduce Power of High frequency output signal (40khz)

I want to try and make the output power of the following driver board adjustable. At full power it runs at 100watt I. The board itself does not have an option to reduce the power output. The output ...
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1answer
242 views

Operating ultrasonic transducers [closed]

I have constructed my circuit as shown in the picture. I am using raspberry pi to generate PWM to the transistor base and an MCP3008 to convert the anolog signals from the receiver. However, both the ...
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2answers
96 views

What is the type of this transducer?

I am working on how to use ultrasonic devices to inspect some products. I am completly new to this. After searching around the Internet and reading the specifications of this transducer, I only ...
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1answer
47 views

Vibrating mesh transducer not nebulizing

Currently, I am trying to use a vibrating mesh transducer that's regulated using a high-voltage driver (100±5kHz, 65±5V), that's Grove Water Atomizer board. Two problems have been arising, which I've ...
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1answer
101 views

What to do with ground wire? [closed]

I have a few I/p transducers(which work on 4-20mA loop current) and I have made a single cable for all of them, they each have posititive, negative and Ground wires. The controller I have for these I/...
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0answers
149 views

What type of sensor connection would be the most suitable?

I have a pressure transducer with a 6 pin bayonet MIL-C-26482 male connector. I need to wire this connector with a 9 pin female D sub analog input connector and I am not sure how to do so. Schematic ...
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1answer
78 views

How to use a pressure sensor (transducer)? [closed]

I have this pair of pressure sensors that are addressable transducers. I want to use them for a project but I don´t really get how to get them to work. I´m used to the type of sensor that has 3 cables(...
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1answer
61 views

When using mA on analog devices, does the other wire go to 0V or Earth?

On the Schneider analog input module (link) we have IC, IV, IS, 0V and Earth terminals for a single channel. I've seen people connecting the signal wire from a transducer to the IC terminal and the ...
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1answer
60 views

Dummy Ultrasonic Transducer

I have several HC-SR04 modules which I wish to modify. There are two modifications in particular I want to ask about First, I am going to use two modules in parallel to determine location as opposed ...
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3answers
328 views

Why is there a negative value on the scada when the analog input wire is disconnected from a field instrument?

I'm an apprentice electrician at an fmcg company. I've been seeing a trend recently, at the plant, where the scada actually reads a negative value instead of zero when a field device such as a ...
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1answer
58 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 ...
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2answers
70 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 ...
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1answer
120 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 ...
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1answer
298 views

Acoustic Emission Sensor [closed]

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....
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1answer
501 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 ...
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0answers
479 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 ...