I am aware of the sensors but i didn't knew about the drawbacks of the sensors that you have mentioned. it was informative and expecting more such videos...
Was not aware of the mm wave sensor. I have been trying to get other sensors mentioned here to work but there was always some kind of an issue or other. This mm wave sensor may be just what I want. Thank you! Off to order one.
I did a project with the first green microwave sensor shown. Worked amazing for sensing people coming into a room or for what I needed it for... to sense people walking down a forest path.... one problem...as soon as the environment around was wet or damp (like rain or morning dew) it was completely blind. I assume what is happening is the microwave signal is being absorbed by the human or wet surface so both send back a shadow....so no movement detected when everything was a shadow. Worked fine in the garden when dry. One to watch out for. Otherwise awesome!
I wondered taht you get a result even in a dry garden. I tried LD2410 line and also RCWL but it fake triggered when the grass or branches is near. Did you finally managed to fix the issues?
@nickolayonischenko3975 Dry garden.. it worked but i can imagine some branches might cause issues. Never solved it. Changed to ultrasonic for the solution.
@@Snagga34 Thank you very much for your suggestions! I tried the the ultrasonic sensor placed 20 cm abowe the ground with some grass and branches and found that i can see the difference between the interference and human precense knowing the distance. The only question now, how it will work when itis rainy..
Thank you for this video. Just an important correction regarding the mmWave sensor you mentioned. It can’t detect people while not moving. In fact, it’s so accurate it can detect the movement of your fingers! I doubt it can detect a still sleeping person.
I mean it can only detect movement. For example, If someone is working on a computer, it can detect the movement of fingers on the keyboard. But in a sleeping person situation, there is no movement thus it won’t detect the person.
@@yrkalaji It's actually tested. mmWave sensor can detect person that is not moving. The signal frequency is 24Ghz that is so high it can detect a single movement even you breathing. It has three signal outputs based on what I saw. First is it detects if there is a person in motion. Second, it detects if there is a person but not in motion, and lastly it detects if there's no person at all.
Great video! I have a question whats the best sensor you can recommend me that detects humans even in the dark and even if that sensor is moving because i want to put it in my security patrol robot project because we are having a hard time choosing a sensor that can detect effectively while it is in motion
Time of flight laser is probably best, as it gives distance and speed, so you could probably subtract out your vehicle speed...ST has some TOF sensors that can track several targets, giving distance and direction, do you could use a bit of trigonometry to subtract out your robot's *velocity", and determine if the detected target is moving either toward, or away from, your robot... important, because you may want to detect only targets that are in motion... Another possibility is to use the TOF sensors to map the area of operations, and look for anomalous targets? Helpful?
If I recall correctly, you can change the sensitivity and duration of the pulse on the RCWL-0516 radar sensor by changing the values of the resistors on it. My only complaint about that sensor is it has a wide detection bubble around it, and since they can "see" through walls, you can't confine their detection area to a single room.
What a cool video. I have been searching for a device that would detect a fuel pump at a gas station. I have a long motorhome and it is hard to judge how far to pull up. Which one of these sensors you mentioned would be best for that application, about a 5 or 6 foot detection range?
That is going to depend on where you are mounting the device. The Laser distance sensor and ultrasonic sensors can be mounted on the side of the home and detect when you pull up alongside the pump, they have up to a 12 ft range. If this was being mounted on the inside of the home, the laser can go through a glass window, but the ultrasonic sensor will be blocked. A camera, display and raspberry pi might be another option to watch from that side as you pull upto the pump. Very creative and unique project! Best of luck!
I'd love to see these sensors applied to detecting when some crook tries to jump under your car to steal the catalytic converter. Hint, hint... video idea....
Thanks for the vid! I’m quite the noob with this stuff, which sensor do you think would be good for a Halloween gag where a skeleton head follows a person walking by at a distance of 6 - 10 ft?
Is there any microwave sensor that detects distance.? Most ae motion detectors. I want my robot to detect object up to many yards away for avoidance and path decisions.
I got a reolink camera with a pir sensor and want to change it to a sonar sensor for fish detection wich activates the camera like the pir does. We want to place the camera underwater. This is our only obstacle that we need some sensor that works underwater to detect fish and activate the camera .. Do you think i would be able to do this ?
hello, I need a sensor that will detect food movement. we have a farm that has metal flat chain feeders that turn on in mornings to feed chickens. the chain moves and distributes feed. sometimes the chain breaks and the feed stops. is there a sensor that will detect when the feed stops
That is a difficult thing to find an answer for without seeing the feeders, you might be able to use a Raspberry Pi and camera and some machine vision to check if there is feed on it. There may be a much simpler solution though (although the machine vision is really easy to get going nowadays!). Feel free to pop a post on our community forums with some images of the feeder with and without feed, we have a lot of maker eyes over there that love this sort of challenge! forum.core-electronics.com.au/
I created an account and posted poultry feed chain, but how do I upload pictures or video, the video is from my phone and they do not except the formats
Our demo was using a Pico microcontroller with MicroPython, not a Raspberry Pi computer. The module uses UART though so any tutorial on how to read a UART on the Raspberry Pi will work! If you are looking for how to get it going on a Pico, we have a guide on how to do so here: core-electronics.com.au/courses/raspberry-pi-pico-workshop/#4.2
The problem I found with PIR sensors is that the standard ones are too cheap and unreliable, especially when range of over five metres is required. I upgraded to a Panasonic EKMC1603111 and despite having no adjustability it reliably detects movement up to 12 metres or more. Including vehicles, which is something the standard sensors couldn't do even on maximum sensitivity.
What if you need to detect attendance system of students or employs using sensor? Employee may go inside and back outside then turn inside once again...still the sensor gonna give wrong result as 2 people at once
Come on, that's a normal problem...just needs direction of travel detection in both in and out sides of the entry/exit, and some thoughtful programming of a $6.00 STM32 or ESP32, or NXP, or Renesas, or...
You might need some sort of a middle man here. Something that comes to mind is using a microcontroller like an Arduino or Pico to read the sensor value, then through Wi-Fi or Bluetooth send that data to an android device!
I need a minute to sit down & figure out cat defenses. Whatever I walk on, sit on or lay down on, they can too, but their understanding of the rule is that it applies when I’m present to enforce it. They’re smarter than I am & I’ll be the first to admit it, but I have opposable thumbs & a credit card for sensing & targeting technology.
BTW, the dome on a PIR sensor is not often a Fresnel lens, except in longer range types ... The dome has multiple small convex lenses, pointing in several directions... these focus the IR in different places, and, as a target moves across the field of view, the "hot spot" moves across the two, or more, pyroelectric sensors, and the difference signal, gated by time (slow-enough changes do not trigger the output...high pass filter), generate a pulse output.
