All About Ultrasonic Components And Accessories

Monday March 7th, 2022 | Francesco Grillo | Industry News

Robots or artificial intelligence systems may need real-world data to collect information. When they need input from the real world, the AI may have several options, including detecting light, ultrasonic sensors, and magnetic field activities.

When it comes to ultrasonic sensors, they usually function through emitting sound waves that have high frequencies that humans do not hear. This is common in bats where they produce sounds, wait for it to be reflected back, and calculate the distance based on the time that they get feedback. Another similarity is through the measurements done by radar and the time it takes to return when it detects a plane or hits an object nearby.

Some of these sensors may use receivers and different sound emitters. However, you can get a combination package in one device or get the required accessories through Ultrasonic Components, whichever one suits you best. This way, it’s possible to have ultrasonic elements alternate between receiving and sending signals.

Other sensors are manufactured in separate accessories and elements. They are very convenient if you need specific applications and the size is smaller, especially if you’re into robotics.

The ultrasonic and radar sensors are readily available for just a couple of dollars, especially if you’re going to use them in a particular situation. However, with the former, you could quickly detect far-away objects in a more effective way than the radar.

For example, light-based sensors may have a challenging time when it comes to processing clear plastics, but the ultrasonic varieties don’t have any issues with this. They are mainly unaffected by the colors of the materials that they are trying to sense.

However, if the object is made up of sound-absorbent material, this may result in inaccurate readings. If you’re going to measure specific distances, there’s a formula that will help you to get more accurate numbers. This is:

Distance = ½ T x C

The C means the speed of sound, and T equals Time. The specialized ones are beneficial in underwater missions and tasks. However, the sound speed in the water is 4x as fast compared in the air, so there should be significant adjustments made to one’s calculations.

What are they Used For?

So, how do you use them in the first place? The first that may come to one’s mind is factory automation or robotics. Water-level activities are good examples, and they can be accomplished when you position the other sensor above the ocean’s surface. Another aquatic application available is to use these devices so you can “see” in the bottom of the water.

Though this might not be obvious on the get-go, the correct devices will measure the fluid flow rate more accurately compared to others. This is an emitter and receiver configuration that’s usually aligned with the fluid flow. Since the sound is going to do the traveling by means of a medium, the speed may be relative to the varying velocity levels.

It can be achieved inside various pipes when one aligns the two elements to each other. Trigonometric relations are used to calculate the velocity increase of the two. The accuracy of the flow rate may be increased when one uses data from various elements resulting in a more accurate result through percentage.

How Do They Work?

It’s possible to apply the theories into reality regarding ultrasonic devices. As mentioned, it generally requires two parts: the receiver and transmitter. These two are placed as close as possible to get accurate data. You can learn more information about a transmitter when you click this link here.

When the receiver is closed to the transmitter, the sound will tend to travel in a straight line. This is going to tell the receiver that it detected an object, and the measurement may yield smaller errors compared to when the two accessories are far away from each other.

The transceivers where the receiver and transmitter function together as one single unit. This will minimize the possible errors and reduce the printed circuit board footprint.

Most of the acoustic waves that are leaving from the transmitter are fan-shaped. They are similar to a flashlight’s laser, so you must consider the beam angle and the spread. As the sound waves travel farther from the transmitter, the detection area may grow vertically and laterally.

These changing areas are the reasons why the ultrasonic sensors have coverage specifications in either beam angle or width instead of the traditional detection areas used in other devices. When comparing the accessories for beam angle from different manufacturers, you may want to verify the beam angle first and its variation from transducers. Verification can be done by calling the manufacturers and asking some questions before you buy.

Another effect that the beam angles have is the device range. The yield is more accurate in a narrow beam because the pulse tends to be more focused. They can go further straighter before they dissipate into an unusable level.

On the other hand, the wider spreads may result in a wider arc, and this can drastically reduce the detection range. Select the ideal ones that are highly dependent on your application. The wider beams are often excellent for general detection and covering a larger area. The narrower ones may avoid the false positives by focusing on a limited place.

Searching for individual components like ultrasonic transceivers may mean that you’re getting one unit. Most of the analog sensors operate by starting to send a trigger signal warning to the transmitter. When an echo is detected, a signal is sent back to the receiver. Designers may customize the encoding and the pulse length as they see fit.

Overall, the entire process will leave calculation periods at the time between the triggers and echoes. Another sensor module calculates the onboard distance then transmits this to the host or the communication terminals. Although you’ll find the transceivers, receivers, and transmitters to be purchased separately, there’s always an option to get custom accessories and circuitry so they will function as a single unit.