Check Distance Between Me and Objects - Underwater

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referee
Beiträge: 201
Registriert: Do 4. Okt 2018, 15:24

Check Distance Between Me and Objects - Underwater

Beitragvon referee » Di 12. Mär 2019, 14:11

I want to measure distance between me and any object, and I want to do this in water. I'm not good at English so I have a drawing.

stopwrinkles
Beiträge: 160
Registriert: So 28. Okt 2018, 15:31

Re: Check Distance Between Me and Objects - Underwater

Beitragvon stopwrinkles » Di 12. Mär 2019, 14:13

referee hat geschrieben:I want to measure distance between me and any object, and I want to do this in water. I'm not good at English so I have a drawing.



If so IR distance sensor would be a cheap option - not exact, but you haven't said how accurately

leedingcaterer
Beiträge: 137
Registriert: Mi 31. Okt 2018, 11:50

Re: Check Distance Between Me and Objects - Underwater

Beitragvon leedingcaterer » Di 12. Mär 2019, 14:13

With a sonar device, there is a chance that the transmitted pulse is too long and will overlap the echo. Check the spec data carefully before purchasing the device.

referee
Beiträge: 201
Registriert: Do 4. Okt 2018, 15:24

Re: Check Distance Between Me and Objects - Underwater

Beitragvon referee » Di 12. Mär 2019, 14:14

With a sonar device, there is a chance that the transmitted pulse is too long and will overlap the echo. Check the spec data carefully before purchasing the device.

stopwrinkles
Beiträge: 160
Registriert: So 28. Okt 2018, 15:31

Re: Check Distance Between Me and Objects - Underwater

Beitragvon stopwrinkles » Di 12. Mär 2019, 14:14

referee hat geschrieben:With a sonar device, there is a chance that the transmitted pulse is too long and will overlap the echo. Check the spec data carefully before purchasing the device.



I think that sensor is meant to operate in air, not water. It's waterproof, not submersible. So even if it survives at your operating depth, it may not work for you, given the different speed of sound in air vs water (and impedance).

leedingcaterer
Beiträge: 137
Registriert: Mi 31. Okt 2018, 11:50

Re: Check Distance Between Me and Objects - Underwater

Beitragvon leedingcaterer » Di 12. Mär 2019, 14:14

You might remember a while ago I told you about a new way to measure geometry in AutoCAD LT 2010 and 2011. MEASUREGEOM is a handy little feature, because it combines a lot of different measurement types and has a nice heads-up display for visual results. But it turns out that the good old DIST command also includes one of the MEASUREGEOM functions – the ability to measure the distance between multiple points. (Note: Don’t get DIST confused with DISTANCE. The first is a command; the second is a read-only system variable that stores the last value of the DIST command. Of course, the command alias DI works too.) After you start DIST, pick your first point, then check out the command line. Notice there’s an option to enter M, for Multiple. Once you do, you get a bunch more options, including Arcs. As you continue to select points, whether along lines or around arcs, the running total is displayed on the command line. Pretty neat, isn’t it? I’m not sure when this was introduced (I don’t have access to all my old versions today), but it’s at least good through 2010. If someone wants to check an earlier version and let me know the result, I’ll update the post.

ratlineinfamous
Beiträge: 17
Registriert: Fr 30. Nov 2018, 10:30

Re: Check Distance Between Me and Objects - Underwater

Beitragvon ratlineinfamous » Fr 19. Apr 2019, 11:31

I think that sensor is meant to operate in air, not water. It's waterproof, not submersible. So even if it survives at your operating depth, it may not work for you, Distance calculator given the different speed of sound in air vs water (and impedance).
Zuletzt geändert von ratlineinfamous am Fr 19. Apr 2019, 19:28, insgesamt 1-mal geändert.

LiamMason
Beiträge: 18
Registriert: Fr 26. Okt 2018, 16:14

Re: Check Distance Between Me and Objects - Underwater

Beitragvon LiamMason » Fr 19. Apr 2019, 11:32

Message me directly of you want more info, that way it is easier to ignore the holier than thou's who come to the GPS section to tell you that measuring distance isn't important and to focus on other things that they think are important.

stopwrinkles
Beiträge: 160
Registriert: So 28. Okt 2018, 15:31

Re: Check Distance Between Me and Objects - Underwater

Beitragvon stopwrinkles » Fr 19. Apr 2019, 11:36

LiamMason hat geschrieben:Message me directly of you want more info, that way it is easier to ignore the holier than thou's who come to the GPS section to tell you that measuring distance isn't important and to focus on other things that they think are important.
I use an app, 'Runkeeper' to log my walks here at home. It records distance, pace, elevations (even calories used!!). Seems fairly accurate and does not use a lot of battery. Although, like Sixwheeler, when walking over distance, I just pick a target stop ahead and walk until I arrive.


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