Hello,
I can't find suitable solution maybe someone faced with same problem. The main goal is to detect my cat near by water bowl and turn on/off water. I tried a few sensors but it not fit into my main goals.
1. HC-SR505 PIR Motion Sensor Module - it detects only motion and I can't setup a distance of detection for it so it triggered not only when cat is moving but anybody in a range.
2. A few proximity sensors - the main problem that they has small angle from 1° to 45° but the main idea is good if cat in range starting from 30cm water is on if he is gone water off.
I start thinking about cat collar with rfid transponder but I want to avoid this solutions as much as possible don't want to put collar to my buddy)
I will appreciate any advices and Ideas!
Thanks
How to detect objects in range of 30 cm (180/360 angle)
Re: How to detect objects in range of 30 cm (180/360 angle)
Could you have a platform in front or around the water bowl which acts like a pressure mat and pushes a micro-switch when the cat stands on it?
Infra red beam which triggers when broken?
Ultrasonic distance sensor? i.e. HC-SR04 (I don't know if cats can hear them?)
BTW - There is a similar thread here on the Arduino forum: https://forum.arduino.cc/index.php?topic=168076.0
Infra red beam which triggers when broken?
Ultrasonic distance sensor? i.e. HC-SR04 (I don't know if cats can hear them?)
BTW - There is a similar thread here on the Arduino forum: https://forum.arduino.cc/index.php?topic=168076.0
Re: How to detect objects in range of 30 cm (180/360 angle)
What about using a esp32 Camera with 180 angel linse and 'face' Detection ?
Re: How to detect objects in range of 30 cm (180/360 angle)
You could try some special passive IR sensors from Kemet. I haven't tried them yet, but from what I've seen, if they offer the claimed range and focal length (60°) then It might be just perfect (and assuming animals can trigger them). I've got a few, just forgot to buy the tiny pitch JST connectors for them... I might receive them in roughly a week, so If I'll have time to play with them I'll post my findings here.
They've got a full lineup, but this is one of the promising ones:
https://www.tme.com/us/en-us/details/ss ... ors/kemet/
This is the connector you'll need to connect to it without soldering: https://www.tme.com/us/en-us/details/sh ... -00mm/jst/
They've got a full lineup, but this is one of the promising ones:
https://www.tme.com/us/en-us/details/ss ... ors/kemet/
This is the connector you'll need to connect to it without soldering: https://www.tme.com/us/en-us/details/sh ... -00mm/jst/
Re: How to detect objects in range of 30 cm (180/360 angle)
You can also try RCWL0516 radar sensor, it works 360 on people, large range but might fits the cast.
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Re: How to detect objects in range of 30 cm (180/360 angle)
As suggested use an ESP32-CAM board.
The code under object_detection contains a choice for cats.
https://github.com/espressif/esp-face/t ... _detection
Finally design an enclosure to only allow the cam to see an area you are interested in.
The code under object_detection contains a choice for cats.
https://github.com/espressif/esp-face/t ... _detection
Finally design an enclosure to only allow the cam to see an area you are interested in.
Re: How to detect objects in range of 30 cm (180/360 angle)
My recommendation is an array of HC-SR04 sensors. There is a challenge that with a simple setup, the distance cannot be measured simultaneously by multiple sensors due to crosstalk. An easy solution for this is
If the academic accuracy is not required/desired, then you can just ping one sensor at the time and wait and response for that before using the next sensor.
- Send a ping with one sensor
- Wait up to 100 ms, to detect possible responses by all sensors
If the academic accuracy is not required/desired, then you can just ping one sensor at the time and wait and response for that before using the next sensor.
Re: How to detect objects in range of 30 cm (180/360 angle)
Thanks for the update and quick reply. I'll be sure to keep an eye on this thread.
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