549 Threads found on edaboard.com: Distance Measurement
One method used is IR tape measurement substitute devices is to modulate the IR emitter with a sine wave superimposed on a DC level. The receiver picks off the sine wave and compares the phase with the transmitted phase. A calibration point is used to compensate for the time delay through the electronics.
Analog Circuit Design :: 04.01.2005 12:00 :: artem :: Replies: 22 :: Views: 9754
Are you talking about a laser or an IR diode?
IR diode: pump it with short >1A pulses while keeping an 1 to 10%
Laser diode: use TOF (time of flight) measurement method.
There are many distance sensors schemes on the net.
RF, Microwave, Antennas and Optics :: 16.02.2007 21:15 :: jasmin_123 :: Replies: 1 :: Views: 426
Can anybody share info about laser distance measurement?
Thanks in advance, cat
Professional Hardware and Electronics Design :: 06.12.2007 09:31 :: kot_b :: Replies: 3 :: Views: 1232
Can you suggest me an Ultrasound distance measurement module which can be connected to a PIC microcontroller?
distance should be measured between 2 nodes. It would be good if the range is about 10-20m. Better if the range is larger.
Microcontrollers :: 21.09.2009 05:23 :: sachithak :: Replies: 0 :: Views: 538
I need to measure distance <50 cm from a wall... I have been using infrared sensors but they give me a number of reading which are no accurate to the distance.
I have a small amount of knowledge about making circuit boards basically how to solder.
I need to be able to make a circuit with a laser which can measure distance to (...)
Robotics and Automatics Forum :: 15.12.2009 20:36 :: mcwee65 :: Replies: 6 :: Views: 4445
In one of my project i need to measure distance. Iam aware of ultrasonic & IR range finders available in the market, I want to know which one is best suitable for my application.
Range : 30cm to 5m
Response time : 100ms
Thanks for your valuable time
Electronic Elementary Questions :: 07.02.2010 04:47 :: microcon555 :: Replies: 7 :: Views: 2315
ACCORDING TO DATA SHEET OF THE ULTRASONIC SENSOR Readings can occur up to every 50mS, (20-Hz rate)
There's a fundamental limitation caused by the sound velocity. The repetition rate must be higher than the echo round trip time to get an unequivocal distance measurement.
The other point is, that wide distance ultrasonic wil
Robotics and Automatics Forum :: 11.01.2011 18:58 :: FvM :: Replies: 10 :: Views: 1013
I want to use ultrasonic sensor for distance measurement but I don't know how it actually works.
can we connect US sensor directly to 8051 or we have to build some oscillator circuitry.
I want that the transmitter goes ON as soon as one of the pin of 8051 is made high.
Is it possible?
Electronic Elementary Questions :: 21.09.2011 11:20 :: Ron1024 :: Replies: 1 :: Views: 356
we are working on a project that requires to sense the distance between two vehicles. thats why we need to know which sensors will be suitable for distance measurement of about 20 meters.
Electronic Elementary Questions :: 03.10.2011 07:44 :: chaitanyakokil :: Replies: 5 :: Views: 359
can anyone help me, how can i measure distance using this sensor (TS601) ultrasonic & PIC 16F877A or 16F73
plz anyone help with code &
Microcontrollers :: 16.10.2011 21:06 :: sujan1380 :: Replies: 4 :: Views: 900
I am working on a distance measurement device using PING ultrasonic transducer and PIC16f877A,
but i cant able write the suitable code for this sensor in C, please help me.
Microcontrollers :: 25.02.2012 13:52 :: maximus332 :: Replies: 7 :: Views: 1306
This doesn't look like a distance measurement sensor, but a "presence" check sensor.
This is generally used with a disk with holes. Depending whether there is a hole between
the diode and the sensor, light will be detected or no. This is used for optical rotation speed
measurement. Depending on the number of holes, you will get an (...)
Microcontrollers :: 21.03.2012 04:07 :: doraemon :: Replies: 1 :: Views: 322
How to interface ultrasonic distance measurement sensor dyp-me007v2 with 8051 microcontroller. Want programming and circuit connection for it. Its urgent.
Electronic Elementary Questions :: 03.05.2012 12:29 :: mrunalmehta04 :: Replies: 0 :: Views: 601
I Want to Make a distance measurement & Indication System Using Ultrasonic Sensor (TS601-01). It Should Consist of A LCD Screen to Display distance & LED With 1 Green & 1 Red. Green LED Should Always Be Lighten Up When the Car (toy) Containing The Sensor is in Safe distance (> 5 CM), But When The Car with the Sensor reaches (...)
Microcontrollers :: 13.01.2013 13:44 :: redwan_3e :: Replies: 12 :: Views: 585
You will need to devise an algorithm to distinguish the subject from the background. This involves identifying shapes and colors on the photographs.
You will compare positions of the subject and the background, measuring the difference in pixels, I imagine.
Some background objects will be hidden. You must program your algorithm to recognize this
ASIC Design Methodologies and Tools (Digital) :: 10.03.2013 03:00 :: BradtheRad :: Replies: 1 :: Views: 103
T=0.693*R*C for single excitation , by this one ,T vary on R and C value only for the distance measure LED application.
The constant 0.693/λ is statistical datum of half life , I(d?) ≈ ∫(((hγ√(N-No)?)÷/(c?λ))d(d?) ...candela. , the scientist like to find the source. Doctors is not but macro phenomenon fo
Analog Circuit Design :: 06.06.2013 23:27 :: phongphanp :: Replies: 14 :: Views: 417
I would like to make a precise distance measuring device (distance from 0 to 1.5m). I was thinking about interferometry. Any plans? What laser should i use?
RF, Microwave, Antennas and Optics :: 22.02.2005 19:06 :: fogl :: Replies: 3 :: Views: 1610
I am currently developing a circuit to measure the distance via the delay of the recieved signal that can occure. any one has a parctical design. Preferred freeq is 2.4 GHz.
Mathematics and Physics :: 16.11.2005 12:20 :: iscom :: Replies: 1 :: Views: 1876
i need a simple ultrasonic transmiter and receiver circuit for distance measurement.
Hobby Circuits and Small Projects Problems :: 16.01.2006 09:47 :: yoges :: Replies: 2 :: Views: 1284
the basic priciple for distance calculation is by calculating the time between the pulse emitted from a transmitter and pulse received by the the receiver.
say if transmitter and receiver placed at same location and distance between the tranceiver and the object is 'd' then the distance travelled by the pulse is 2d .
knowing the light (...)
Electronic Elementary Questions :: 03.07.2006 15:05 :: rosarioantony :: Replies: 11 :: Views: 1248
there is ready to use sensor from Sharp
but .... intenity of reflected infrared radiation and detected by diode will be dependent on :
a. environemtn radiation noise
c. reflected object size
Said is true if you are trying to make reflected level based distance measurem
Microcontrollers :: 04.12.2006 19:56 :: artem :: Replies: 22 :: Views: 11855
you build the uploaded project ?
i want to modify it such that , it will on the buzzer for less than 4 feet distances !
can you help me for modification !
your project is similar to the EPE "tape measurement " project ?
i build it working fine but , i need modification !
Microcontrollers :: 03.02.2008 14:47 :: manish12 :: Replies: 24 :: Views: 16549
Is it possible to make a distance measuring sensor using IC 555 and IC 565 along with an IR LED and photodiode pair? I have the transmitter circuit which pulses the IR LED at a particular frequency using IC 555(used in astable mode). Now I want to design the receiver circuit using photodiode and IC 565(PLL) in order to filter out the ambient light
Analog Circuit Design :: 22.11.2007 08:05 :: John_Correa :: Replies: 32 :: Views: 3065
speed would be speed of sound :D
time=(somedelay + timer of MCU)/2
they said ultrasonic range is around 200cm....i think...that would be on datasheet
Microcontrollers :: 28.01.2009 09:10 :: leoren_tm :: Replies: 20 :: Views: 6640
My problem is that i have to measure distance using an ultrasonic receiver ,in order to measure the water level of a small tank ,but i have to use only analog means,no microcontrollers:( , can anyone help me??
i thought about using a counter that would start counting when the transmiter send a pulse and stoped when the receiver is activated and t
Hobby Circuits and Small Projects Problems :: 29.05.2009 22:20 :: liakofan :: Replies: 10 :: Views: 3008
I am a newbie to this board and hands-on electronics in general. I am trying to identify a kit which can help me build a system which can do proximity measurement along with direction.
I have gone through some of the offerings from various manufacturers who sell ultrasonic proximity sensors and the like (ping). I am looki
RF, Microwave, Antennas and Optics :: 13.08.2009 06:51 :: thebiggestbangtheory :: Replies: 2 :: Views: 765
i am using an atmega32 at 5v with 16mhz crystal. i have written the code for the ultrasonic distance measurement
sensor. this is the code ---
#define lcd_port PORTD
#define LCD_EN 0x80
#define LCD_RS 0x20
unsigned int count, dist, temp, t; // C
Microcontrollers :: 30.08.2009 16:34 :: rahuljin :: Replies: 3 :: Views: 5973
Could you give more details of your requirements? What distance range? Accuracy? measurement speed?
Analog Circuit Design :: 01.03.2010 23:20 :: keith1200rs :: Replies: 4 :: Views: 481
I HAVE A PROJECT TO MEASURE distance IN A ROBOT THAT USE INDUCTIVE SENSORS FOR ENCODERS.
AND THE ROBOT IS REMOTELY CONTROLLABLE.(THAT PART IS ALREADY DONE,)
MY PROBLEM IS TO GET THE distance ROBOT TRAVELED USING ENCODERS,
I NEED TO CONSIDER ABOUT THE TURNING PART AS WELL.
THANKS FOR ANY IDEA!!
USING ALL CAPS MEANS
Microcontrollers :: 26.03.2010 08:38 :: pw123 :: Replies: 2 :: Views: 845
Ir works better for smaller distances. For 1-5m I would recommend you sonars. Off course it also depends distance to what want to measure.
Hobby Circuits and Small Projects Problems :: 02.06.2010 22:33 :: micard :: Replies: 4 :: Views: 1678
Yes speed of sound is one parameter (≈ 340m/s @ 20°c)
To find the distance (for up and down) you can use s=ut where s=distance in meters, u=speed of sound in m/s and t = time in seconds
So distance to the object = s/2
You may check this example
if you have timer value = 250 and XTALL = 11.0592MHz then
Microcontrollers :: 12.09.2010 16:05 :: bassa :: Replies: 9 :: Views: 621
hello everybody,, :D
I've a problems in my project,,
I want to measure distance using ping ultrasonic sensor and PIC16f84a with 4Mhz xtall and display it in 8 bit data,, when the distance is 300cm led in PORTB show ffh
I've already made the program,, but this program doesn't run well,,
the counter is reset when the distance 125cm,,
Microcontrollers :: 18.10.2010 19:17 :: rhee2 :: Replies: 2 :: Views: 1067
Can anybody help me. I want to measure the distance between an object and the camera through which the snap has been taken. I've came to know that using the actual area of the object I can calculate the distance using some technique. All I want to know is that technique. And if one can tell me any other solution then it will be great......
Digital Signal Processing :: 18.03.2011 16:04 :: annna :: Replies: 9 :: Views: 4892
i want to build laser distance meter with following requirement. if anyone worked on that please help me out.
1 it should measure upto 100m
2 it must works 3 days continuously.
3 with cm acuracy.
thank you in advance.
Embedded Systems and Real-Time OS :: 24.04.2011 08:58 :: piyush_bhatt :: Replies: 9 :: Views: 2234
I am trying to do distance measurements between two radios. Now I have found a method I am confident will work, and does work in my simulations. As I know only the basics of RF design I had hope to find a near complete transceiver as an IC and make a circuit board for it. Unfortunately it seems that due to a few special requirements that ther
RF, Microwave, Antennas and Optics :: 02.05.2011 15:01 :: armadi :: Replies: 3 :: Views: 745
I need to plot the oscillations of a vibrating system in PC application. During oscillation the complete distance (peak to peak) is around 7 cm. I have successfully completed PC application , interfacing and micro controller part. For measuring distance, initially I used sonar but its resolution (1 inch) was not suitable for me.. I jumped to I
Hobby Circuits and Small Projects Problems :: 18.05.2011 14:41 :: zeeekay :: Replies: 1 :: Views: 845
Here is one method.
Point the laser beam at the object whose distance from you you is required. Focus the binoculars on the laser beam, ensure the image is sharp. The distance marking on the binoculars will indicate the distance of the object.
Microcontrollers :: 14.08.2011 07:31 :: arbj :: Replies: 3 :: Views: 247
Hi guys, I have been looking around, for a laser distance measuring device, about 200$, but couldn't find anything related. Could anyone suggest some distance measurement lasers.
I will describe my project needs. I need a laser scanner/range finder to detect cars in parking spaces in a parking lot, basically know how many parking spots are (...)
Hobby Circuits and Small Projects Problems :: 09.09.2011 04:30 :: aditya_g8 :: Replies: 2 :: Views: 1559
hi, pls give me code for distance measurement using an ultrasonic detector and interfacing with pic 18f.
Microcontrollers :: 17.11.2011 07:17 :: monicadavis88 :: Replies: 1 :: Views: 671
As i said in my title. i need someone to teach me how to measure distance using SRF05 Ultrasonic sensor and printing in onto the 16X2 lcd? i am using mplab ide 8.80v and c18 compiler. i am using a PIC18F4520, 8Mhz internal oscilator.
Microcontrollers :: 23.11.2011 03:09 :: undeadmage :: Replies: 5 :: Views: 613
I want to measure distance using radio waves
I have an antenna transmitter and a receiver antenna, the antenna emits a sine wave and its frequency changes. waves transmitted and reflected by an obstacle, then transmitted to the receiver antenna
wave antenna in both forward and reflected waves
so i want to
RF, Microwave, Antennas and Optics :: 01.12.2011 12:38 :: drkirkby :: Replies: 1 :: Views: 490
i am doing my mini project. can i use ultra sonic sensors for water level measurement in over head tank.
my idea is to measure the water level by ultr sonic as a distance measurement system . ultra sonic tranciever is mounted on a plastic pipe, and the pipe (...)
Electronic Elementary Questions :: 24.02.2012 19:09 :: MICRO THOUGHTS :: Replies: 2 :: Views: 330
Write the user stories of what your project must do for example:
Generate 40 KHz carrier wave
Generate transmission pulses (2Hz)
Time period between TX and RX
Amplify received signal
Rectify received signal
Display distance on LCD
Analog IC Design and Layout :: 06.03.2012 09:15 :: klystron :: Replies: 2 :: Views: 380
I want to find a distance sensor but not using the IR sensor can any one help me in choosing a good sensor. I prefer digital sensor.
Hobby Circuits and Small Projects Problems :: 28.03.2012 12:53 :: mohamed.elsabagh :: Replies: 16 :: Views: 1067
I have a project that I want to do using lasers to detect a persons shoulder from no more than 3 meters away and no less than 2 meters away. I have looked at other detection solutions such as IR and other devices but due to the material type (t-shirt) and the device having to work out side I have ruled those out. Unless you think it can s
Electronic Elementary Questions :: 24.04.2012 02:58 :: stephkre :: Replies: 3 :: Views: 517
Let's assume that we have simple FMCW distance measurement system with linear frequency sweep from F1 to F2. Sweep duration is T.
ADC frequency is enough to digitize 128 points for each sweep duration T. Then we do some windowing and perform an FFT. For example 1024pt FFT (yes, i know about 128 points and interpolation, but it is from real
RF, Microwave, Antennas and Optics :: 28.05.2012 14:11 :: Terminator3 :: Replies: 2 :: Views: 307
Can you explain how i can do this...
I don't want to use controller at my sensor end...
Because my device is having 8 to 64 sensors.
Think you ought to reconsider your choice of an Analogue sensor; the method of how to transmit an analogue signal over 100 m and how you intend to select and read in
Microcontrollers :: 01.06.2012 10:07 :: wp100 :: Replies: 9 :: Views: 876
Myself Sumanta Kumar Show is trying to implement a program regarding measurement of distance through AT89C2051 Microcontroller. The program is as follows -
ORG 0BH ;TIMER 0 INTERRUPT VECTOR; AJMP TIMER0ISR ;Timer 0 Interrupt service routine address
MOV SP,#60H ;set stack pointer
Microcontrollers :: 04.07.2012 08:41 :: shom_show :: Replies: 3 :: Views: 390
The transmitter and receiver communicate on the same frequency. The devices are stationary at time of measurement. Range can be up to 150 meters from each other. Possible obstacles (E.g ceilings/walls). Must be as portable as possible. Low power / not constantly on.
I would like to measure the distance and direction/angle to the transmitter as a
Electromagnetic Design and Simulation :: 09.07.2012 22:45 :: kyclopas :: Replies: 8 :: Views: 579
need to display distance using 8051 and hc-sr04 on LCD.
i have the code for distance measurement and LCD but don't know how to display it please help
the code is attached.
Microcontrollers :: 14.01.2013 19:36 :: zulnorain :: Replies: 0 :: Views: 195