need note about ultrasonic sensor

[tek_.]

....................sorry....................

 

[dknguyen]

Sonar

Sends a high frequency sound pulse and measures the time it takes for echo to return. Then uses speed of sound and return time to calculate distance to object.

Good in water. Nothing travels as well or further. Okay in air. Bad in wind. Speed of sound affected by air pressure and temperature. Accuracy decreased by wind. Frequency used determines tradeoff between a small beamwidth and longer distance.

 

[akg]

1)What is ultrasonic sensor,
2)ultrasonic sensor operation,
3)ultrasonic sensor application,
4)ultrasonic sensor advantage and disadvantage.

1. some device that can sense the presence of ultrasound
2. uses piezo electric crystal that is tuned(resonates) at a particular (ultrasound) frequency
3. many-sonar distance finders, proxymity detectors , movement detectors , fault finding etc
4. adv and disadv between what .?

 

[tek_.]

.......................sorry...............

 

[Dr.EM]

Results in air can vary with temperature. Limited range.

 

[JimB]

Another "please do my homework for me" type question if ever I saw one!

JimB

 

[akg]

the advantage of ultrasonic sensor and disadvantage of ultrasonic sensor..

cannot say anything like that .. u anyway need an ultrasonic sensor for sensing ..u can compare the adv/disadv of different makes of US sensors.

 

[Hero999]

the advantage of ultrasonic sensor and disadvantage of ultrasonic sensor..

That's like saying "What's the advantage of an LED and disadvantage of an LED"; seriously are you retarded or something?

 

[philba]

That's like saying "What's the advantage of an LED and disadvantage of an LED"; seriously are you retarded or something?

no, not retarded, just intellectually lazy and academically dishonest. And please don't insult retarded people by associating this guy with them.

 

[holobean]

no, not retarded, just intellectually lazy and academically dishonest. And please don't insult retarded people by associating this guy with them.

oh come on.. u maybe more experience then others doesn't mean u can call them retard.. maybe he is jus learning? But i must agree tho.. that he is lazy, i mean those kinda info u can jus find it on the web..

 

[GoKid]

simple instructions

Go to Google.com

cut and paste this:

ultrasonic transducers

hit enter

 

[philba]

oh come on.. u maybe more experience then others doesn't mean u can call them retard.. maybe he is jus learning? But i must agree tho.. that he is lazy, i mean those kinda info u can jus find it on the web..

ok, sure, I won't call him retarded. oh, yeah, I DIDN'T. sheesh...

come on people, watch your attributions. don't put words into someone's mouths...

 

[dknguyen]

I already told you the advantages and disadvantages. Read the second paragraph of the second response.

 

[Hero999]

Either way he should learn English or put something sensible in his location and I might have resisted the flame.

 

[tek_.]

I'm not lazy.and i'm not retarded too...i'm sorry if i've made difficult here..i just want sum one help me..anyway i appreciate it..