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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Assistance in finding proper sensor for short-range object detection task
We are working on a research project. We try to measure the distance from an object to some static line/pole. The area of interest is within a range of 1 to 5 meters, and the tracked object is a human....
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Have I understood this solution to the sensor synchronization problem correctly?
I read a research paper which proposes an algorithm to synchronize sensors in a way that is independent of the sensors.
Beginning with the simplified version which assumes no drift between the sensor <...
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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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Narrowing the beam of an ultrasonic sensor
I need to measure the distance to a solid or liquid in a round tank about 2 feet wide and 5 feet deep using a sensor that can output PWM and run at 3.3 or 5 volts.
After testing, I've found that the ...
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Directional Speakers
I am working on an exhibition where I want to use DIY, self-made directional speakers for transmitting interviews to the visitors.
Until now I have seen a couple of video on Youtube like the one ...
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Is my ultrasonic cleaner using a common mode choke as an AC to DC converter?
I am repairing an ultrasonic cleaner with a faulty circuit board. It has a blown out diode and capacitor that needs to be replaced. The board, however, has me curious and confused as to its function. ...
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Measure distance to object with angular precision - invisible for camera
I want to build myself an arduino based follow-focus. There is one mode intended for using a joystick for manual control of focus and zoom. This code already works a treat.
Now I want to add a ...
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How do I amplify a square wave pulse of 4 to 8 periods at 3.5 MHz from +-2V to +-60V or more?
I am working with ultrasound sensors optimized for 3.5 MHz signals, and I want to test these using my PicoScope 5000 with integrated signal generator. The PicoScope is able to generate arbitrary ...
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Ultrasonic generator - a couple of questions
Here is the ultrasonic generator circuit I'm trying to understand:
It is powered by USB and it produces 100V at 100kHz on the piezoelectric speaker BQ1.
Two ...
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Analog phase shifting circuit
I have a high voltage(let's say +-100Vpp) sine signal of 500khz and i want this signal to be phase shifted(+ve) by 0, 90, 180 and 270 degrees.
That is a circuit which has 500khz input signal and 4 ...
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High pitch audio frequency measuring
Wondering on how could higher pitches than 23 kHz be measured, I can only find devices measuring to about 21kHz.
Main question is: how could audio frequencies about 26 kHz or 30 kHz be measured, on ...
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How to send different data to three DACs at the same time?
I am building ultrasonic system that needs to generate three different signals for three transducers at the same time.The system is controlled via DSP. Currently I have a DAC with 4 outputs, but as I ...
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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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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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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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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 ...
CommunityBot
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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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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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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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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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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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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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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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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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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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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 ...
CommunityBot
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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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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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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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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 ...
CommunityBot
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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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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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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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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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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 ...
CommunityBot
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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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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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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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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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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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Can computer speakers emit ultrasound?
Can computer speakers emit ultrasound? What is the maximum frequency that computer speakers can produce?
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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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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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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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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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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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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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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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