| 18 Sep 2019 |
| 17:39:21 |  kelu | Another goodie for debugging.. an impedance analyser. Here hooked to a double peak transducer.
50$ on eBay makes it useful to check piezos connections.. and for reverse engineering as well :) |
| 20 Sep 2019 |
| 14:46:38 | | kelu changed their profile picture. |
| 27 Sep 2019 |
| 17:17:25 | kelu | Hi there. Good to read from you. Would you be in a position to share previous experiments JSONs for reference? |
| 5 Oct 2019 |
| 03:11:01 | |  arhik joined the room. |
| 7 Oct 2019 |
| 08:53:05 |  wotlr6427 | Thank you for your kind reply. |
| 9 Oct 2019 |
| 19:33:03 | kelu | For pyexiv, the solution is to install the package, the following works on my machine:
sudo apt-get install libexiv2-dev python-pyexiv2 |
| 16 Oct 2019 |
| 06:03:16 | wotlr6427 | Thank you so much for your help. I was wondering if we could use the source you gave us to connect to Bluetooth, and if the source you gave us could also function as Bluetooth. |
| 21 Oct 2019 |
| 10:54:31 | kelu | Thanks T ri for the video https://www.youtube.com/watch?v=S8_0MuVqFJA 😃 |
| 23 Oct 2019 |
| 18:14:33 | kelu | Hehe good news, the up5k board seems up and running ! Details on acqs - https://github.com/kelu124/echomods/tree/master/matty/20191023a - there was a last hardware bug 😅
Acquisitions of 300us at 64msps, 12bits, seem to work fine 😃 |
| 29 Oct 2019 |
| 01:13:28 | wotlr6427 | Thank you so much for your help. I was wondering if we could use the source you gave us to connect to Bluetooth, and if the source you gave us could also function as Bluetooth. |
| 04:48:55 | kelu | Ooops did not see the previous message |
| 04:49:11 | kelu | Theorically yes, as the raspberry can do Bluetooth |
| 30 Oct 2019 |
| 03:19:59 | wotlr6427 | Thank you for your answer.
sudo apt-get install libexiv2-dev python-pyexiv2
The following error occurs even when installing .
Can you help me with why? |
| 03:20:23 | wotlr6427 | Thank you for your answer.
sudo apt-get install libexiv2-dev python-pyexiv2
The following error occurs even when installing .
Can you help me with why? |
| 07:20:23 | kelu | Please don't copy the threads on the "general" channel to keep a clean channel 😃 |
| 07:20:56 | kelu | I would encourage you to learn a bit about python.. basically the error says that there is no "image" folder .. so you may want to create one |
| 09:25:52 | wotlr6427 | Thank you |
| 4 Nov 2019 |
| 23:09:10 | kelu | Fpga rock: https://hackaday.com/2019/11/04/gigantic-fpga-in-a-game-boy-form-factor-2019-supercon-badge-is-a-hardware-siren-song/ |
| 5 Nov 2019 |
| 10:33:45 | |  bennylaor joined the room. |
| 10:33:46 | bennylaor | Hi all. I am new in the field of Ultrasonic testing but I believe it can be the best solution for checking the sample with cracks that I have. The sample is a ring at the diameter of 100 mm. The thickness is about 1.5 mm and the length is about 3.5 mm. There are two cracks inside at the sides. I am looking for a system that I can buy to measure the size of the cracks. Will be happy to get assistance offers or ideas. |
| 17:20:20 | kelu | Hey Benny, glad to read from you. Yup, I guess ndt will help. Would you have a drawing of your ring with idea about the cracks positions ? |
| 6 Nov 2019 |
| 07:57:37 | bennylaor | Hi. Attached you will find an image of the ring which has diameter of about 100 mm. I also added a Cross Section where I marked the two flaws/gaps. X-Ray is the best however it is very expensive and requires a lot of protection. I thought that Ultra Sonic will provide a good solution. |
| 7 Nov 2019 |
| 06:55:09 | bennylaor | Hi. As I indicated the sample is steel and the two flaws are air. Hope it helps |
| 8 Nov 2019 |
| 07:24:04 | kelu | I guess ultrasound could help, you would need some good transducers I guess |
| 07:24:28 | kelu | FCS7CKPD, what do you think ? |
| 08:25:16 | bennylaor | Hi. Can you please recommend one good transducer? I would like to start seeing the Echo pulse and to do some manual experiments. Is the kit that you made available to be purchased? |
| 09:37:55 | |  jarija joined the room. |
| 09:37:55 | jarija | Hi Benny, your best option is to go for a 10MHz dual element transducer. On such thin piece of metal 5MHz transducers don't have enough resolution to detect the cracks you want to find. |
| 11 Nov 2019 |
| 19:41:14 | bennylaor | Hi Jorge. Thank you for the information. If you have recommendation for specific probe I will be happy to hear. |
| 18 Nov 2019 |
| 10:08:20 | jarija | Benny, DA-312 from GE Inspection for example. You can also use one of those Chinese ones. Yushi have good quality ones... |
