Questions tagged [ultrasound]

Questions regarding Ultrasonic devices and uses. Ultrasound is higher than the typical human hearing range, with the low end at 20khz. Ultrasonic distance and Proximity meters are common. Be careful around Chiroptera and marine life. Your dog might not like it either.

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1answer
194 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 – ...
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3answers
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Using ultrasonic sensors to measure distances to multiple objects

I'm doing a project which using ultrasonic sensors to measure the distances to objects. As far as I know the sensor can only measure the distance of the closest object to it. Is it right? And in ...
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48 views

Components to record ultrasonic sound? Up to 200kHz

For a personal project, I’m trying to record ultrasonic sound. I would like to find the best way to record from 20kHz to 200kHz. As I found from Wikipedia, animals can hear up to 200kHz. As I prefer ...
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1answer
164 views

Tweeter speaker crack on turn on/off when ultrasonic signal is played

I wired a Fostex FT17H to a YAMAHA R-S202D receiver and put a 1µF capacitor on the + line (like the manual suggests). If i play now a "normal" audio file (<20kHz) everything is great but when I ...
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108 views

sensitivity of ultrasound transducer related to output

Can any one explain to me how is the sensitivity of an uktrasound head related to the Output pressure Level?
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50 views

MUX for receiving 1MHz ultrasonic signal from multiple transducers

I have one ultrasonic transducer that is connected to high voltage Pulser (1-2MHz), I want to detect the ultrasonic signal generated by this transducer with other multiple transducers (~16). I have an ...
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3answers
7k views

Ultrasonic Sensor to detect water flow

I am trying to build a small DIY kit that can detect water flow in a pipe using ultrasonic sensor. I have found Ultrasonic Distance Sensor but not Ultrasonic Flow Sensor. Would really appreciate any ...
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2answers
355 views

Issues using an Ultrasonic Sensor with Raspberry Pi

I am conducting a project which needs to use a precise ultrasonic sensor but I am having trouble working it with the raspberry pi. The sensor I’m using is the Senscomp 600 series; the manual isn’t ...
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3answers
393 views

Polarity of Ultrasonic Sensor

I see some ultrasonic sensors have legs with different length, such as below. Does it means they have polarity? Are there any differences taking different leg as the signal pin?
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136 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 ...
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4answers
2k views

Impedance matching vs. voltage gain

So I have an ultrasound system operating in the 1-10MHz range: Pulser -> Tuning circuit -> Transducer -> Tuning circuit -> Voltage amplifier The goal is, I'm trying to optimize the tuning circuits ...
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1answer
102 views

How are high voltage ultrasounds kept safe?

EDITED question to be more useful. I don't understand why driving piezo ultrasound at 100V isn't a huge safety hazard. I have seen lab settings where the lead wires are attached to a device on skin. (...
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125 views

What controls the MAXIMUM allowed frequency of the sound in electronics? The circuit or the speaker component?

I noticed that on some of my devices, I cannot go further than 22.0 kHz, 32.0 kHz, 44.1 kHz, 48.0 kHz and such but what actually causes these limits?
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129 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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Over what frequency range can the microphone of smartphone receive the sound?

I have a project in which I am considering using the microphone from a smartphone for the reception of inaudible signals (> 15khz). What is the frequency range that such a microphone of receive sound?...
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Help finding a suitable transformer

I have built a circuit that can drive a 3.3v AC output at a few hundred mA. The wave has a frequency of 150Khz. I want to step this up to 60-90v at ~0.5 Watts to drive an ultrasonic piezo. However, I ...
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Measure fluid height in bottles

We need to measure the height of different fluids (from clear water to oil, everything is possible). The bottles may come in different sizes and may have an opening as small as 10mm. The bottle ...
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1answer
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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
33 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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3answers
2k views

Is there an I²C device out there for reading a set of PWM inputs?

I'm thinking about getting a bunch of Maxbotix Ultrasonic rangefinders. I'd like to use as few pins on my controller as possible. Since I don't think you can have multiple devices on an RS232 serial ...
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1answer
15k views

Creating a home made ultrasound transducer

I don't know how ultrasound transducers (transmitters) are made, is it possible to create a home made ultrasound transmitter with a custom specific range 1MHz or more? If it is not, would a 3D ...
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2answers
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How do I drive an ultrasonic transducer with an Arduino?

I am attempting to build a cat deterrent with an Arduino, something akin to this. I have figured out detection, and now realize that I need to use an ultrasonic transducer to produce the 'blast' that ...
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1answer
243 views

ultrasonic-sensor to Logic Level Converter to raspberry pi [closed]

Trying to connect Ultrasonic sensor to my raspberry Pi. Im aware of two methods: connect the trig to a 1k resister before connecting to raspberry pi Use a 8-Channel Logic level converter I trying ...
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2answers
132 views

Ultrasonic Cleaning for RAM and CPU after water damage [closed]

After suffering water damage from a broken pipe. I would like to know if I can use Ultrasonic Cleaning in order to clean the CPU and RAM. 1 x Thread Rripper 2990WX (2000 Euros) 8 x 16GB Ballistix RAM ...
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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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4k views

Smallest circuit for Ultrasonic Mist Maker or humidifier

I am working on Ultrasonic Mist Maker or humidifier circuit, but does not found any good circuit. As search on google that we have to make about frequency 1.6MHz to convert water into mist. using ...
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2answers
68 views

Unit of ultrasound A-scans

I have a basic question concerning ultrasound A-scans. Such an A-scan might typically look as follows (source: https://img.medscapestatic.com/pi/meds/ckb/18/7418tn.jpg): I understand that the x-axis ...
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1answer
630 views

Mounting Ultrasonic Sensor on Metal Container to Measure Liquid Level

Is it possible to mount an ultrasonic sensor on the outer metal surface of tank/container to measure the level of the inside liquid ? the gap between the sensor and the metal surface would be 0 mm to ...
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1answer
508 views

Polar pattern of typical speakers and microphones found in smartphones

I'm interested in knowing how is the directivity of the typical microphones and loudspeakers found in smartphones and tablets affected as they operate in the near ultrasound region (18-21 kHz). Near ...
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0answers
137 views

Driving a piezo speaker at 40 KHz

I'm trying to drive this piezo element at 40 kHz but am running into troubles when using a function generator since the element requires greater drive. I got the guts of an ultrasonic cleaner to ...
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1answer
51 views

JSN SR04 not giving correct readings when connected to ESP32?

When I connect a JSNSR04 to ESP32 and power it with USB of my computer, I am able to get correct readings. But when I power it with buckconverter for short distances ( <150) JSN gives correct ...
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2answers
55 views

uC-adjustable harmonic oscillator circuit @100W

I'm looking for a circuit that performs a harmonic oscillation while its resonance frequency can be controlled with a microcontroller (preferably via an analog signal). The circuit has to drive a set ...
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1answer
69 views

Why is JSN giving error readings when powered with Buck converter 12v to 5v different power source?

When I power my esp32 with an USB cable and check the readings of JSN-SR04 it shows correct and consistent readings. But when I connect esp32 and jsn with 5v from LM2596 12V input errors are not ...
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1answer
69 views

Refraction vs Reflection in Ultrasonic sensor for water level detection

I want to use ultrasonic module JSN-SR04 for detection of water level inside tank. The US module has single sensor for Transmission and Reception of US signals as shown below. I wonder if US sensor ...
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1answer
49 views

Ultrasonic module Water proof vs non-water proof types

Ranging SR04 Ultrasonic modules are available as water proof and non-water types. In the water proof types SR04 modules there is only 1 sensor while in the non-water proof types SR04 there are 2 ...
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1answer
58 views

Is it possible to use Ultrasonic sensor HC-SR04 in continuous power-on mode

I will be using Ultrasonic sensor HC-SR04 in water level measurement. I will be triggering the US sensor and getting back the time-pulse from it at very slow rate maybe once every minute. I want to ...
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3answers
2k views

why ultrasonic module sends out 8 cycles ? and , why the trigger pulse is 10us?

this is the operation of the ultarsonic module HC-sr04 : The timing diagram of HC-SR04 is shown. To start measurement, Trig of SR04 must receive a pulse of high (5V) for at least 10us, this will ...
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74 views

Can we use long wires with ultrasonic module HC-SR04

I want to use Ultrasonic module HC-SR04 as ranging sensor but my MCU board is approx 80 ft away from the place where I have to put the US module. These are its pin-outs and descriptions: My ranging ...
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1answer
214 views

40kHz Ultrasonic transducer - datasheet gives capacitive load at 1kHz what is it at 40kHz?

A hopefully simple question, the datasheet for a 25kHz Ultrasonic transducer gives the capacitance load at 1kHz what is it at 25kHz? I've been calculating the current using I = fCVpp where f is ...
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6answers
24k views

Can computer speakers emit ultrasound?

Can computer speakers emit ultrasound? What is the maximum frequency that computer speakers can produce?
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1answer
143 views

How to amplify a signal for piezo transducer from 1 Vpp to 200 Vpp at 400 kHz and 500 pF load

I'm a researcher working with phased ultrasonic transducer arrays. I need to amplify a sine wave at 400 kHz and 1 Vpp to 200 Vpp. It has a capacitive load of 500 pF. I'm little ...
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3answers
486 views

ultrasonic setup guide

Does anybody know of any online resources that go over the setup of driving ultrasonic transducers, as well as how to receive an ultrasonic echo, and pick it out (for rangefinding)? I found this ...
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1answer
6k views

Driving high voltage to ultrasonic transducer with Arduino

I'm trying to drive an ultrasonic transducer with an Arduino. I have the arduino putting 40kHz out of pin 10 and I would like to step that up from a 5V square wave to 100Vp-p or anything near there. ...
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2answers
346 views

How to understand an ultrasonic sensor datasheet?

I'm trying to model the ultrasonic sensor for a simulation and I need to somehow express in what angles and distances the object will be detected by the sensor. What does sensitivity mean? It is set ...
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25 views

Finding the gain difference for a ultrasonic assembly

I am tuning an ultrasonic assembly for a welding application and tuned the system to operate at 41kHz according to the oscilloscope. The transducer operates at 40kHz, when calculating the gain with ...
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1answer
54 views

Driving distance sensor from ubuntu usb

home automation is driven by a PC running Ubuntu. It currently has a 1-wire network of thermometers for managing our geysers and solar water heaters. I would like to extend it to manage our water ...
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2answers
1k views

How do ultrasonic sensors differentiate between transmitted and received signals?

I understand how these ultrasonic sensors work on the basic level: They send out ultrasound, which is then reflected by an object and is then sensed by the receiver. But the receiver and the ...
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1answer
2k views

Ultrasonic cleaner control with Arduino

I'm trying to build a small sized ultrasonic cleaner. I bought a couple ultrasonic transducers (ranging between 40kHz - 102kHZ and 15 - 35 watt) which I want to play around with. There are already ...
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Hobby Project - Signal Frequency detector

Context: I have taken on a little side hobby project to learn by making a circuit which should be able to only go high when it sense an acoustic signal with a frequency around 40kHz. To do this I will ...
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1answer
172 views

AC Ultrasonic Speaker Design [closed]

As a software engineer I apologize in advance, I'm definitely an amateur in the field of electronics. Problem I'm looking to gauge distance from an ultrasonic emitter to a mobile device. To test ...

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