Hi,
Is there a sensor which can detect fast moving small object of the size of a tennis ball, within the range of 3 to 4 meters. I want the measurement to be accurate and it has to detect the object every time. this is not a hobby project but for something much serious.
Thanks in advance.
A number of ultrasonic sensors could probably do exactly what you want. How fast would the object be moving? What is it for? For example, something as simple as the HC-SR04 could do, with a range of ~2-450cm and an operating frequency of 40kHz.
Another option could be the SEN0002, by dfrobot. It uses RS485 for communication, and has a slightly higher range, at ~4-500cm.
How fast, and in which direction(s) relative to the observer?
How big exactly, what shape and what material(s) is it made of?
Do you need to detect its presence only at a distance of >3 and <4 meters, or also outside this range?
How many of these objects will be in this range at the same time?
What is the angle of view (hor + vert) you're trying to cover?
Are there any other objects in view in this segment?
How accurate precisely? And what kind of sampling rate do you need; i.e. how fast do you want to be able to track the object?
Anything you can tell about the application and context will be helpful and likely essential in determining which solution(s) may work. This includes information on e.g. the required size and weight of the sensor system, what is done with its output, what kind of output you require in the first place, what the intended lifetime of the sensor is or if it's sacrificial, what the power requirements are, required uptime, etc. etc.
With a forum posting like this, I always want to know how you, personally, detect this object. Do you detect it visually? Do you detect it by sound? Do you detect it by feeling the air pressure change on your skin? The answer will give the first cut at finding a suitable sensor.
- We are detecting a tennis ball. its made of fur, and it has a diameter of 6.5cm.
- it might be travelling between 50 to 150 kmph.
- I will be using two to three sensor which will be in a line and the object will be travelling parallel to it. and I want the sensor to detect the object within 4m of the sensor.
- I want the measurement to be accurate to the mm.
- We will be using these devices in semi professional indoor cricket matches.
Thank you @chrisd79
Hi @Paul_KD7HB
We will be detecting a tennis ball. It does not matter as long as it is reliable (The measurements are accurate and it works 100% of the times.
I tried using HC-SR04 ultrasonic sensor, I was not happy with the results as it fails to detect the ball 5 times out of 10.
The cone of detection should also be like more than 60 degrees.
No chance of that.
- I want the measurement to be accurate to the mm.
well, what you're looking for will be on planet mars.
You would most likely need a high-cost-sensor, and at that point you might as well move away from arduino for this project.
How about centimeters?
which other platform can support this project in that case?
A radar gun would be a good idea, but if you want to built your own, there will be tutorials online that will show you how to build one using arduino
most ultrasonic sensors are accurate within ~3mm. within the mm would be pretty difficult
Interesting how this thread is evolving. First just detecting a ball. Then measuring things, then having multiple detection stations.
So the detector must be a continuous detection, No ultrasonic, no radar gun because they are not continuous. The ball is now a fur covered, so no sonic reflections.
I guess light being obscured is the only type sensor that is left.
I also though of using IR sensor or the doppler sensor.
- I tried using HB100, but the right amplification. I could not figure out the right circuit for a High gain low frequency amplification, because it has a lot of noise, which will give bad results.
- I've been thinking of ToF or LIDAR sensors, but the cone of detection is not really good on them, I can sacrifice the cone of detection if they are accurate to centimeters and if they are reliable.
but can they detect a ball moving fast, if yes, which sensor would you suggest, I can take 3mm error on the result.
did you try and bridge VCC and GND with a nF capacitor? A tantalum capacitor and proper grounding will reduce electrical noise.
Can you please provide me more information on this, do you have the circuit diagram?
You would need to provide me your circuit diagram first.
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