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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9
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2answers
3k views

Collimating a sonar beam

Wondering if anyone is aware of a way to cause an ultrasonic proximity sensor to be modded, such that, it's forward line-of-sight range remains unaffected, but it's angular spread is reduced, somewhat ...
13
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2answers
18k views

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
597 views

Shallow underwater wireless sensor network

I need to make shallow (max 2m) underwater wireless sensor network. Data payload is about 10kB/s. I know that VLF band (~3-30kHz)could be the best solutions for that, but cause of time-to-market I ...
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2answers
2k views

What will increase output volume (dB) on a Piezo Transducer?

I need to achieve 110dB at 25khz from a Piezo Transducer. According to the datasheet, the resonant frequency of the Piezo is 25khz and at 10 vrms it will produce 110dB. I will be using an ...
2
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4answers
14k views

How to Wire Up Ultrasonic Transducer

I want to use the direct time of flight method to measure the distance between a person carrying an arduino and a certain part of the room. I have come across many different boards which can easily be ...
3
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1answer
2k views

Test circuit for EU1640BCH12T / R Water proof ultrasonic sensors with Arduino?

I have EU1640BCH12T/R waterproof ultrasonic sensors, which I have got from this link. These are standalone raw sensors without breakout board and not a module like HC-SR04. Being a new electronics ...
2
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1answer
513 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 ...
14
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5answers
19k views

Driving 50W-250W ultrasonic transducers with sine: Any Class B 135KHz monolithic power amp ICs?

My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave (/ sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency. The question: What ...
8
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5answers
18k views

Underwater distance measurement/Sensing

I am working on a project from University which includes a ROV. I am trying to come up with an easy way to create a Distance Sensing system, which doesn't require a lot of work. something very simple ...
4
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4answers
7k views

Replacement Transistor for Ultrasound Cleaner

I'm trying to repair the generator board on a Sonix IV ultrasound cleaner. I need to find a replacement for a transistor (in a TO-3 package), but the manufacturer uses an in-house part id, so I'm ...
15
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4answers
3k views

Why sound wave is the best choice for many location detectors?

So I'm currently working on my high school final project, which is basically a Radar :) ... I'm using the SRF05 detector to detect objects that are near the surface of the device. My current ...
8
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1answer
4k views

Driving LM3886 at 100 KHZ in Bridge Tied Load (BTL) configuration?

Would someone have experience with driving a pair of LM3886 Overture Power Amplifiers in BTL with up to 100 KHz sine wave? My parameters: Frequency band of interest: 20KHz to 100 KHz, sine wave ...
2
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3answers
3k views

How to measure output of the ultrasonic transducer?

I have found a test circuit for the ultrasonic transducer. How do I measure the output distance sensed by the ultrasonic transducer using my Arduino Uno R3? Please help. I have attached the test ...
1
vote
1answer
510 views

Problems when loading an Ultrasonic transducer (reflected power)

I have a very simple setup that is giving me problems I cannot understand: Apparently, the reflected power is the same as the power generated by the amplifier (both measured by the amplifier, ...
1
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2answers
1k views

Piezo transducer current consumption

is there any way how theoretically determine the current consumption of ultrasound piezo transducer? I only know impedance for res freq = 50 ohms and excitation voltage around -170 V. Does the Ohms ...
0
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0answers
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 ...
3
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3answers
12k views

Building an Ultrasound Generator

I need to generate ultrasound with a frequency of 1.5 MHz. The ultrasound should be pulsed as shown here An ultrasound pulse should be 200 µs long, a pause (no ultrasound) is 800 µs long. The desired ...
2
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2answers
5k views

Does it exist: 360 degree ultrasonic receiver/beacon combo

Note: I posted this over on Robotics but the more I think about it, the more I realize this would be better asked here. Basically, I want to detect an ultrasonic beacon in a radius around the robot. ...
2
votes
1answer
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 ...
1
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4answers
3k views

How to control the driving frequency when working with high power ultrasonic transducers

I would like to know the simplest solution to dynamically tune the driving frequency of an ultrasonic transducer to its resonance frequency. My amplifier has a power meter that I can read an optimize ...