Post by thread:Tilt Sensor

Hi has anyone any experience of a low cost proportional tilt sensor (with say +20..-20 degrees in a single axis). I would guess that a liquid based sensor would be the most likely. Anyone know of anything suitable? Thanks Andy

At 19:12 8/06/97 +0100, you wrote: >Hi has anyone any experience of a low cost >proportional tilt sensor (with say +20..-20 degrees >in a single axis). I would guess that a liquid based >sensor would be the most likely. Anyone know >of anything suitable? > >Thanks > >Andy Hello Andy, About 20 years ago, I designed and prototyped a 2 axis inclinometer based upon capacitive techniques to measure level changes of icebergs (I feel another old timers' story akin to teletypes coming on <g>). Each axis used 2 pcbs separated by about 0.125" with all edges sealed. It was half filled with kerosene, so as not to freeze; the rest was air. The dielectric constant of kerosene is much larger than air. Two capacitors were formed by large areas of copper on each pcb facing each other. These were connected to CMOS oscillators whose frequencies were sampled and counted. Very good correlation of counts to degrees and a resolution of better than 0.1 degrees as I remember. One capacitor was placed so as to be always covered by the kerosene irrespective of the inclination and formed the "variable" element of a reference oscillator which allowed monitoring of the oscillator's transfer function due to temperature, aging and power supply effects upon the sensor. The other capacitor was shaped and placed so that the level of the kerosene varied its capacitance in direct proportion to the change in inclination, plus and minus. Imagine a right angle triangle sitting on a square whose top edge coincided with the upper kerosene line when the sensor was level. Too hard to draw here. Vector techniques were then used to combine the two axis data to resolve the orientation and magnitude of the movement from level. Another approach, but lacking directionality, is to use a ping pong ball half filled with mercury. The outer top half is then metallised and electrodes connected to the metalised surface and to the mercury within. Measure the capacitance again. The final suggestion; a potentiometer with shaft axis horizontal and a stiff rod with weight attached. Body of the pot fixed to what you wish to monitor. Gravity turns the pot and you read the change in resistance. Ahh, the good old days .... Regards, Ross McKenzie Melbourne Australia

Andy Shaw writes: > Hi has anyone any experience of a low cost > proportional tilt sensor (with say +20..-20 degrees > in a single axis). I would guess that a liquid based > sensor would be the most likely. Anyone know > of anything suitable? How about using some number of mercury switches? They are pretty cheap. You could also use something connected to a strain guage. Mal Goris -- http://www.nfra.nl/~mgoris/

Just a couple of ideas, levels for construction are now electronic. At 07:12 PM 6/8/97 +0100, you wrote: {Quote hidden}>Hi has anyone any experience of a low cost >proportional tilt sensor (with say +20..-20 degrees >in a single axis). I would guess that a liquid based >sensor would be the most likely. Anyone know >of anything suitable? > >Thanks > >Andy > > Thanks. **************************************************** __ Micheal Yano ---- Internet: spam_OUTmyanoTakeThisOuTcimtek.on.ca -CIMTEK- IBMMAIL: .....i1320285KILLspam@spam@IBMMAIL.COM ------------ Voice: (905)847-8811 x22 FAX: (905)847-8822 ****************************************************

> >Hi has anyone any experience of a low cost > >proportional tilt sensor (with say +20..-20 degrees > >in a single axis). I would guess that a liquid based > >sensor would be the most likely. Anyone know > >of anything suitable? > >Thanks > >Andy How about a pendelum on a potentiometer? Vesa OH3NWQ -- ---Tampere---a-place-in-Finland-where-everything-gets-tampered-with--- //oh3nwqKILLspamnic.funet.fi http://www.funet.fi/~oh3nwq/ ---------------------------Assimilate-this----------------------------

Andy Shaw writes: > Hi has anyone any experience of a low cost > proportional tilt sensor (with say +20..-20 degrees > in a single axis). I would guess that a liquid based > sensor would be the most likely. Anyone know > of anything suitable? Check this place for an application of a tilt sensor I did, the APC-3. http://www.rcboats.com Andy ====================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 USA Electronics for Industry & R/C Hobbyists "Go fast, turn right, and keep the wet side down!" ======================================================================

The new Maxim Engineering Journal (#29) has a Design Showcase for a Adjustment-free inclinometer using a PIC16C54,LCD,MAX147(a/d) and sensor. The sensor is SPECTRON L-211 FREDRICKS 0725-5006. It references a related article in the 4/24/97 issue of EDN.

Mike DeMetz wrote: > > The new Maxim Engineering Journal (#29) has a Design Showcase for > a Adjustment-free inclinometer using a PIC16C54,LCD,MAX147(a/d) and > sensor. The sensor is SPECTRON L-211 FREDRICKS 0725-5006. It references > a related article in the 4/24/97 issue of EDN. I've got a few questions about this interesting message; 1. Is Maxim Engineering Journal for sale in Europe (holland). 2. Is inclinometer the same as altitude-meter. 3. What's EDN Max Dekkers

> I've got a few questions about this interesting message; > > 1. Is Maxim Engineering Journal for sale in Europe (holland). > 2. Is inclinometer the same as altitude-meter. > 3. What's EDN Hi Max, Maxim Engineering Journal is a sales newsletter. Maxim sends it out for free, probably to Holland. Check http://www.maxim-ic.com/ An inclinometer measures tilt angle from level. Not altitude. EDN is the best "free" electronics magazine. The "Design Ideas" from readers is wonderful. Not free in Holland. The web site is at http://www.ednmag.com/ There are code and some articles on the web site. Cheers, Bob

I'm using the ADXL202 and this baby is about $50 CAN a piece! Anything > around that does X and Y perhaps with less sensitivity and resolution > for the $10 you speak of? > > Craig Lee > These guys make what you want tilt senors for car alarms. Don't know about price. http://idt.net/~aosi/

part 0 2779 bytes content-type:text/plain (decoded quoted-printable) ------ 1999\01\14@130238 by Andy Kunz >Do you guys know about a tilt sensor I could use in my project ??? I am > >looking for a device that would either return a bynary or analog value > >proportionnal to it's tilt level. > >I looked in Digi-Key, Marshall and NuHorizon web site without success. > >Could I use a fluxgate device like the Vector 2 Compass module in the > >vertical axis if I use the raw magnetometer output??? Michael, Check out the Analog Devices ADXL202EB. This is an eval board which would do you a great service. If you are price-oriented, ask skipspam_OUTrcboats.com about buying his sensor. Andy \-----------------/ \ /---\ / \ | | / Andy Kunz \ /---\ / Montana Design /---------+ +---------\ http://www.montanadesign.com | / |----|___|----| \ | \/___| * |___\/ Go fast, turn right, and keep the wet side down! 1999\01\14@135643 by Reginald Neale Try: http://www.frederickscom.com http://idt.net/~aosi/Dx.htm http://www.spectronsensors.com Reg Neale >Do you guys know about a tilt sensor I could use in my project ??? I am >looking for a device that would either return a bynary or analog value >proportionnal to it's tilt level. 1999\01\14@203808 by Steve Tomes Try a linear hall sensor...they work great and are easy to implement You get a variable voltage out and can convert to a digital signal. Allegro hasd excellent applicatiion notes on the subject...STEVE T 1999\01\14@230748 by steve > Check out the Analog Devices ADXL202EB. This is an eval board which would > do you a great service. If that's the eval board for the ADXL05, I believe it has been discontinued. Of course the ADXL05 will make a very good tilt sensor on its own (if you don't mind a sine function). Steve. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: @spam@stevebKILLspamtla.co.nz fax +64 9 820-1929 ====================================================== 1999\01\14@235428 by retorius Johan * Spoornet Try the ADXL 202 from analog devices. {Quote hidden}> -----Original Message----- > From: Michel Tremblay [SMTP:KILLspamMtremblayKILLspamSIDUS.CA] > Sent: 14 January 1999 07:21 > To: RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU > Subject: Tilt sensor > > Do you guys know about a tilt sensor I could use in my project ??? I am > looking for a device that would either return a bynary or analog value > proportionnal to it's tilt level. > > I looked in Digi-Key, Marshall and NuHorizon web site without success. > Could I use a fluxgate device like the Vector 2 Compass module in the > vertical axis if I use the raw magnetometer output??? > > Thanks in advance > > Michel Tremblay > Network specialist > Certified Banyan Engineer (CBE) > Microsoft Certified Professional (MCP) > Sidus Systems Inc. > spamBeGonemtremblayspamBeGonesidus.ca > ICQ 5046815 > 1999\01\15@030845 by Jochen Feldhaar Hi, there is an integrated circuit from Analog Devices called the AD202XL, which is a silicon implemented gravity sensor with great sensitivity. It can be used as a precision tilt sensor. Will cost about 10 Dollars each. An israeli-based compamy called ERM has a tilt sensor on offer called T_Jack 2001, and inside is ...listen well... a PIC 12C508!!! So this is a good application for a PIC. See the AD webpage for details on this cutie. Greetings Jochen Feldhaar DH6FAZ TakeThisOuTjfEraseMEspam_OUTdetektor.de 1999\01\15@051538 by Tom Handley Michel, others mentioned the Analog Devices ADXL202. This is a +/-2G, 2-axis, device providing a TTL-level duty cycle output. They have a reference design based on a PIC including the code. They also have a little evaluation board which is what I have. For more info: http://www.analog.com/imems/ - Tom At 12:21 PM 1/14/99 -0500, Michel Tremblay wrote: [MIME stuff deleted] {Quote hidden}>Do you guys know about a tilt sensor I could use in my project ??? I am >looking for a device that would either return a bynary or analog value >proportionnal to it's tilt level. >I looked in Digi-Key, Marshall and NuHorizon web site without success. >Could I use a fluxgate device like the Vector 2 Compass module in the >vertical axis if I use the raw magnetometer output??? > >Thanks in advance > >Michel Tremblay More... (looser matching) - Last day of these posts - In 1999 , 2000 only - Today - New search...