Ultrasonic Sensors Overview from AutomationDirect

[@fennietroost5750]

Hi there, For a project at uni, I need to incorporate a sensor that will sense if someone is walking/moving/standing within a (approximately) 3 meter radius of the product I am designing. If the sensor picks up on the object, a light in the product will fade in. There is no need for the sensor to measure the distance, I just need a sensor that will notice objects within a (+/-) 3 meter radius. The sensor needs to be as small as possible, as there isn't that much space in the housing of the product. It also needs to be as cheap as possible (but still a durable sensor, as the product is designed for a public space (outside)) as it is designed for a municipality. Would you have any recommendations on which sensor to use? I did search the website, but I am not sure on which outputs to use (e.g.). Thank you in advance!

[@automationdirect]

Sounds like you are looking for a 360 degree object detection sensor that is inexpensive and works outdoors. That's a tough requirement. I can't think of anything AutomationDirect has that will fit that application. Suggestion: Do a KZbin search for "360 degree LIDAR scanner" or "Getting started with LIDAR."

[@fennietroost5750]

@@automationdirect Thank you for your answer! I did look into LIDAR, but unfortunately, it seems that certain types could be harmful for the eyes, so I am not sure if that could be used in a public space (though I could look into it further). However, instead of radius, I actually meant distance (my bad), so the sensor doesn't necessarily have to pick up a 360 degree view. Would it then be possible to use an ultrasonic proximity sensor?

[@automationdirect]

@@fennietroost5750 Yes, an ultrasonic sensor would be ideal. The main reason is you want to operate outdoors - and sensor that uses light (like LIDAR) will be susceptible to sunlight, glint, reflections, etc. Which explains why automobiles use ultrasonic for their collision avoidance systems. Beware that ultrasonic sensors don't update very fast (they have to wait for the sound energy to go out and come back) so keep an eye on the specs. Some will be a slow as a few Hz, while some are quite a bit faster. And that will correspond to their detection distance capability.

[@nomanshiekh26]

I saw some videos on youtube in which they use UDS to create a 2D graph of a Room , can that be achieved with a HCSR04 without any special software (matlab) ?

[@automationdirect]

@ Noman Sheikh, We are not familiar with testing ultrasonic sensors for 2D or 3D scans of products or rooms. It would depend on the input required from the interface. It would probably require an analog signal vs a discrete "on/off" signal to determine distance and product measurements. You can always contact our free technical support for help questions on the products we carry. community.automationdirect.com/s/contactsupport

[@saadulhassansyed9686]

Please tell what are different types of ultra sonic sensors like thermocuple.

[@automationdirect]

Hi Saad, Not sure I understand the question. Are you asking which types of Ultrasonic Sensors are like Thermocouples? Thermocouples measure temperature, Ultrasonics measure distance. They are completely different ...

[@saadulhassansyed9686]

@@automationdirect I am asking on basis of construction or design are there any ultrasonic sensors like thermocouple have k type s type.

[@automationdirect]

@@saadulhassansyed9686 Gotcha. Nothign like that. The main thing to watch out for with Ultrasonics is the pulse rate. The longer the distance the slower the pulses (it has to wait for the wound waves to go out and come back) and hence the slower the response time. Other than that, they are all pretty much the same.

[@TylorCooks]

Building a Gokart and I want something with proximity detection, what would you recommend?

[@automationdirect]

@ b Any of the diffuse ultrasonic sensors should work for detection but the designer will have to specify required distance, voltage and body style to determine which model of ultrasonic sensor to select. These style sensors have been used on similar projects with success. If you need help selecting sensors, call our free, award-winning technical support team. community.automationdirect.com/s/contactsupport

[@dav7411]

I want to check the level of grease in barrel...it possible by ultrasonic sensor?because grease surface is uneven some grease stick at the sides of the barrel..

[@automationdirect]

You Can, but it all depends on your setup - how big the barrel is, distance from the sensor etc. Check out this video where we use an ultra sonic sensor to measure the height if water in a barrel: kzbin.info/www/bejne/rZXGmqSKf8ingdk It might give you some ideas. Also, take a look at these sensors - they are designed specifically for measuring levels: www.automationdirect.com/adc/shopping/catalog/process_control_-a-_measurement/level_sensors_-a-_controllers

[@automationdirect]

David, Ultrasonic would not be a good detection method for uneven surfaces like grease. The uneven surface would not reflect the sound wave in a manner that would give a good reliable reading. Two methods I have seen that works well is a laser distance sensor or using a flat surface paddle that is connected to a chain that sits on the top of the grease and that paddle becomes the flag for measuring.

[@dav7411]

Thanks for your reply... I am using a grease lubrication pump and its capacity is 5 &10kgs..i want to set a low level alarm but i have no idea to set...Thats why i am searching for low level sensors...if you have any idea to set low level alarm please share it

[@automationdirect]

@@dav7411 Ultrasonic could work, but you might want to take a look at laser distance sensors too. AutomationDirect has a wide range of those from Wenglor.

[@jaimewilsonmalpicaaguilar2077]

Hi, I want to know how to adjust the range of an ultrasonic sensor for PLC. They have a default range but how do I modify that range? Is there any other software or al can be done in the same ladder logic software?

[@automationdirect]

Hi Jamie, These sensors have a "Teach Button" that allows you to adjust the range. Find the sensor you want to use on the webstore (www.automationdirect.com) and you will see all the documentation on how to do that. It's typically something like: Hold the button until the light flashes to mark one distance and then change the distance and hit the button again. Hope that helps ...

[@stevelux9854]

We purchased one of your UK1A-EP-0E ultrasonic Proximity Switches and it has a +/- 8 degree beam angle. I have proven the concept that it can replace one of the through beam optical sensors we currently have in place for our automated painting process. The issue is that these sensors are used in an array of 16 sensors that are spaced 2" apart over a string conveyor. My concern is the possibility of cross-talk or interference between sensors set at such close proximity. All 16 sensors are set 2" apart, and pointing in the same direction. They are tilted at a 30 degree angle to the plane of the product and the product is irregular, so I suspect the signal reflections might interfere with adjacent sensors. I see some vendors discuss various schemes to counter this issue; some being the synchronizing of multiple sensors and another using an interlocked electronic timing method that sequences the staggered firing of each adjacent sensor. Another manufacturer; (IFM) uses "sound tubes" to help reduce interference and cross-talk. What can you tell me about issues with or methods to compensate for sensor cross-talk or interference? Added: The reason I am wanting to change to Ultrasonic is because our optical through beam sensors typically read through our white plastic parts and the PLC cannot read when to start spraying in automatic. Hence the operator has to run the paint spray guns in manual, which wastes paint, and sometimes they forget, or are slow to set to manual and then we have quality issues. Cross-talk or interference is one of the reasons I haven't really considered diffuse sensors. Thanks,

[@automationdirect]

Hi Steve, You didn't mention is how far the sensors are from the target. That is the primary deciding factor because the detection cone gets larger that farther away the target is. Be careful with trying to time the sensors. The switching frequency on those is only 10 Hz and the startup time is a couple hundred ms - so if you try to switch them faster than a few times a second your results may be unreliable ... Seems like an optical solution would work better for this application. I believe AutomationDirect has optical sensors that are specifically designed to handle non-opaque materials ... I'll see if I can find an example and get back to you ... Stay tuned ...

[@automationdirect]

Hi Steve, Go to www.automationdirect.com and take a look at the OPT2139 or OPT2140 Retro-reflective sensors - they can handle clear glass so they might work for your application. And they are less expensive than the UK1As ... If you have more questions, please contact our free technical support team - they will take good care of you. Support: support.automationdirect.com/

[@stevelux9854]

The distance from the sensor to the product is 200mm on the outside, down to about 70mm at the closest. Additionally: due to slight overspray and general ambient dust, (and due to the general lack of good housekeeping practices in our paint department) I am trying to shy away from retroreflective sensors - anything optical. I think I have found a potential solution to my issues concerning ultrasonic signal cross-talk/interference. Basically taking a hint from IMF, but rather than using a sound tube I plan to use 3/4" heat shrink tubing over the end of the sensor to basically create a reverse funnel to block most signals coming towards each sensor at an angle. I ordered a few more of the UK1A-EP-0E sensors to test this idea.

[@muntasirsarwar7184]

What's a good budget industrial/commercial grade Ultrasonic sensors ranging for 1-2 meters max.how much would they cost.?

[@automationdirect]

Hi Muntair, you can see all of our Ultrasonic Sensors here: www.automationdirect.com. Go to the left column menu and select sensor, then ultrasonic. Then scroll the left menu to sensing distance where you can filter on the range (and other things) you need.

[@aravindhs9988]

Am amazed with the technology of yours... but what will happen if there was a foam above the liquid level.. how will this technology give us the correct reading? can you explain if possible

[@automationdirect]

Hi Aravindh, most folks put the sensor in a pipe (called a "standing pipe") that runs to the bottom of the tank. That way the fluid inside the pipe doesn't have any foam and the sensor can easily measure the fluid level.

[@4312-c3n]

If the sensor is fixed along a rope looking down, waiting for a load to come up, would the sensor see the rope even if they are parallel.

[@automationdirect]

There is a possibility the sensor would see the rope - depends on a lot of factors like rope type, diameter, how close the sensor is to the rope, etc. Without knowing more about your application that is difficult to answer here. Please contact our free tech support during regular business hours - they will be happy to help you. Tech Support: www.automationdirect.com/support

[@anushree.k.r.5676]

Sir , plz send the link of creating 3D model of ultrasonic sensor in autodesk

[@automationdirect]

Anushree, we do supply 3D models for most of our sensors. Please see the product page of the sensors you are interested in and the model can be found there.

[@PROKASHBISHWASH]

can i use ultrasonic sensor for detecting liquid under high pressure in steel container ? if yes, which type of ultrasonic sensor should i use?

[@automationdirect]

Prokash, I have used Ultrasonics in this fashion before, and never had a problem. Our line of ultrasonics are not designed for this operation. Our level sensing ultrasonics are only rated for 30 PSI.

[@atcharasaraphol4518]

Hello, Can I apply Ultrasonic Sensors measure the height and wavelength of the water?

[@automationdirect]

@Atchara Saraphol,. Yes there are ultrasonic sensors specifically designed to measure the height of standing liquid. Please see this link for an example: www.automationdirect.com/adc/shopping/catalog/sensors_-z-_encoders/level_sensors_-a-_controllers/flowline_ultrasonic_level_sensors_(non-contact)

[@avinashgupta7089]

if we use ultrasonic sensor in heavy magnetic field then will it give accurate readings?

[@automationdirect]

We don't think there should be an issue, but are confirming with the supplier .. stay tuned ... (apologies for the delayed response)

[@automationdirect]

Just got the answer from the manufacture: "The nominal tests performed by us (required by the Standards) have been thought for granting immunity against electromagnetic fields from 80Mhz to 2GHz (3V/m). We cannot grant the correct performances when stronger fields are present." Hope that helps.

[@constantingavril4713]

I i wanna see some overview regarding to ultrasonic sensors for robotic hobby (not for industrial purpose). there's such a great difference between these types of approaching.....For example, HC-SR04 is strongly dependent by the type of surfaces, colour, geometry and dimenssions of the target. Much more, it's hardly dependent by the environment conditions, especially by the temperature and light. Neither Ping Parallax ultrasonic sensor isn't so independent of these aspects. I don't say these two sensors aren't able to give good result of the distance measurements, but you need to do a lot of software compensations.....

[@automationdirect]

Thanks for the suggestion. We have a number of competition robotics teams (FIRST Robotics) that use our sensors so we have a series covering exactly what you describe in our queue. Now we just have to make time to do it. Your query will help move that up the priority list - Thanks!

[@amitkumar-lz6ye]

Is there any contact ultrasonic sensor??

[@automationdirect]

@amit Kumar, thanks for the comment. I am assuming you are asking "Do we have an ultrasonic sensors with Dry set of contacts?". We currently, only carry PNP and NPN, which would require a simple relay for a dry set of contacts. Please see part number 781-1C-24D, it is $4.50 plus the cost of the base. www.automationdirect.com/adc/Shopping/Catalog/Relays_-z-_Timers/Electro-Mechanical_Relays/Square_-z-_Cube_Relays,_Plug-In,_3A__-15A_(78x-z-___Qxx-z-H78x_Series)/General_Purpose,_15A_(781_-z-_782_-z-_783_-z-_784_Series)/781-1C-24D

[@charumathi8556]

Can ultrasonic sensor differentiate mainly plastic materials?

[@automationdirect]

@Charu MATHI, Ultrasonic sensors are not typically used in differentiation applications, of similar materials.

[@charumathi8556]

is it possible to detect plastic materials?

[@automationdirect]

Yes, ultrasonic sensors can detect plastic.

[@charumathi8556]

which sensor is used to differentiate the materials?

[@automationdirect]

That greatly depends, on the type of materials you are trying to differentiate. Ultrasonic, since using sound wave, does work well in differentiation of solid materials. Typically if you are trying to differentiate solid materials, visual or weight measurement is the more precise method.