Gated Ultrasonic Transmitter

If you going to measure distance, you should two devices.

Like this:

No, I am not measuring distance. Just making a transmitter.

David White

On Sun, 25 Mar 2012 09:25:38 -0600 in sci.electronics.design, hamilton wrote,

Polaroid didn't.

And do you know why ??

I have a Sonin Multi-Measure that also (normally) works with just one device. It bounces sound off of the wall or other structure to which you want to measure the distance. Works quite well.

If there is no reflective surface at the other end such as if you want to measure foundation digging dimensions before anything is built or when the distance is very large then you'd need a 2nd echo device.

--
Regards, Joerg

http://www.analogconsultants.com/

I'd use a tape measure ;-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.

Behind the building at one of my clients you would most definitely prefer the ultrasound method. There's some gators out there.

--
Regards, Joerg

http://www.analogconsultants.com/

What is the acoustic _absolute_accuracy_ at 100' ? A foot? ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.

The manual says 3-3/4 inches at 60ft.

--
Regards, Joerg

http://www.analogconsultants.com/

At what temperature range? If you want your footer built with that kind of accuracy, go ahead. We'll measure the south line today, but wait until tomorrow to do the north line because there's a cold front coming thru and it's going to rain :-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.

Note that there are laser-based range finders in the same price ballpark that appear to be rather more accurate. E.g.,

-- 1/16" at 130', $90.

You can't measure the actual casing for the foundation with that. But for trenching it's usually ok.

When I laid carpet tiles a couple months ago I did it for kicks. Measured the first tile marker line with the Sonin, switched to metric because I use a German "Zollstock" with centimeters to cut tile. Said

284cm from there to the wall. Took the Centimeter measure ... 283.6cm.

--
Regards, Joerg

http://www.analogconsultants.com/

Yep. ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | I love to cook with wine. Sometimes I even put it in the food.