1000 Threads found on edaboard.com: Distance Measurement
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 :: 02-16-2007 15:15 :: jasmin_123 :: Replies: 1 :: Views: 629
Can anybody share info about laser distance measurement?
Thanks in advance, cat
Professional Hardware and Electronics Design :: 12-06-2007 03:31 :: kot_b :: Replies: 3 :: Views: 1378
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 :: 09-20-2009 23:23 :: sachithak :: Replies: 0 :: Views: 694
I am working on a new distance measurement sensor for robotics/automation that can measure distances from 0 up to 20 meters.
I am interested in what other solutions that are available for distance measurement that works from 0 meters. Does anyone know about such a sensor?
Robotics and Automatics Forum :: 01-10-2011 16:49 :: oyvdahl :: Replies: 10 :: Views: 1358
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 :: 09-21-2011 05:20 :: Ron1024 :: Replies: 1 :: Views: 509
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 :: 10-03-2011 01:44 :: chaitanyakokil :: Replies: 5 :: Views: 504
can anyone help me, how can i measure distance using this sensor (TS601) ultrasonic & PIC 16F877A or 16F73
plz anyone help with code &
Microcontrollers :: 10-16-2011 15:06 :: sujan1380 :: Replies: 4 :: Views: 1296
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 :: 03-20-2012 23:07 :: doraemon :: Replies: 1 :: Views: 532
How to interface ultrasonic distance measurement sensor dyp-me007v2 with 8051 microcontroller. Want programming and circuit connection for it. Its urgent.
Electronic Elementary Questions :: 05-03-2012 06:29 :: mrunalmehta04 :: Replies: 0 :: Views: 1315
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 :: 01-13-2013 07:44 :: redwan_3e :: Replies: 12 :: Views: 1545
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) :: 03-09-2013 21:00 :: BradtheRad :: Replies: 1 :: Views: 220
Hi All. My first post here so please go easy!
I need to design a cheap simple device to measure distance variations. The key being the word variation.... which will be from 0 to 5mm with accuracy/rsolution to a micron (10^-6m)
Having looked at some historic posts using IR, UV led with sensor is a good option. my proposed design will be teles
Analog Circuit Design :: 05-18-2013 08:44 :: fazhols :: Replies: 19 :: Views: 829
hello i want to make distance measurement using ultrasonic sensor by using 8051 and I want to display it on LCD
I written assembly code but there are some errors..
can any one provide me assembly code for this....
I am attaching my project files
Microcontrollers :: 03-08-2014 09:07 :: niranjan23 :: Replies: 11 :: Views: 777
hi im not a pro in electronics.. im doing it as a hobby.. im doing a laser distance measurement with phase difference method.. my target is to measure upto 50 meters. im using a 635nm 1mw photo diode i want to know what what photo diode i need to use here. and how to figure it out? i mean is there any calculations i need to do for that?
and im u
Analog Circuit Design :: 06-19-2014 04:16 :: aishak_97 :: Replies: 3 :: Views: 329
I must confess that I don't even know what "old unmodulated CW radar" is. Classical radar is pulsed. The only fixed frequency CW applications I'm aware of are traffic speed control (and target lighting for surface-to-air missiles).
Theoretically, you can determine the phase shift of reflected wave for two frequencies separately, both oscillators
RF, Microwave, Antennas and Optics :: 08-24-2014 05:30 :: FvM :: Replies: 4 :: Views: 232
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 :: 08-13-2009 00:51 :: thebiggestbangtheory :: Replies: 2 :: Views: 893
Generally for measuring distance, ultrasonic technique works well...Cheers
Robotics and Automatics Forum :: 12-22-2009 09:58 :: pranam77 :: Replies: 6 :: Views: 5638
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 :: 07-04-2012 02:41 :: shom_show :: Replies: 3 :: Views: 793
Good application !
Thank's for sharing..
you can also increase accuracy by adding air temperature measurement ,
to correct sound speed in the air... you can earn any % of accuracy..
// Via la mesure de temperature LM35DZ en °C
// reajuste la vitesse son dans l'air f(Temperature)
// y = 0,5803x + 328,39
Microcontrollers :: 06-04-2014 13:16 :: paulfjujo :: Replies: 1 :: Views: 379
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 :: 01-04-2005 06:00 :: artem :: Replies: 22 :: Views: 10907
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 :: 02-22-2005 13:06 :: fogl :: Replies: 3 :: Views: 2259
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 :: 11-16-2005 06:20 :: iscom :: Replies: 1 :: Views: 2194
Search google for the same, you will find lot of projects based on ultrasonic distance measurment.
Hobby Circuits and Small Projects Problems :: 01-21-2006 04:29 :: Code Warrior :: Replies: 2 :: Views: 1503
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 :: 08-30-2009 10:34 :: rahuljin :: Replies: 3 :: Views: 7690
I fear, that none of the suggested solutions works at 5 m distance. In principle, you can measure distance by triangulation
with high accuracy, but unfortunately, you need a large base distance.
Unfortunately too, you didn't tell a word about resolution and accuracy. For higher accuracy, laser time-of-flight and possibly
optical FMCW (...)
Electronic Elementary Questions :: 02-07-2010 04:58 :: FvM :: Replies: 7 :: Views: 2975
The said distance sensor uses a special integrated optical device from Sharp rather than a simple LED and a phototransistor.
The latter are good for a reflective switch, but don't allow distance measurement.
Analog Circuit Design :: 03-02-2010 01:10 :: FvM :: Replies: 4 :: Views: 603
what all things you tried?
i think you use two encoders if you want to measure the turning parts
else you connect the encoder to the wheel of the robot, calibrate that for 1 rotation
in distance. now start counting the distance
what are the problems that you are facing?
please post it then only anyone can help you
Microcontrollers :: 03-26-2010 07:31 :: microlab :: Replies: 2 :: Views: 1067
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 :: 06-02-2010 16:33 :: micard :: Replies: 4 :: Views: 1926
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 :: 10-18-2010 13:17 :: rhee2 :: Replies: 2 :: Views: 1367
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 :: 04-24-2011 02:58 :: piyush_bhatt :: Replies: 9 :: Views: 3102
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 :: 05-02-2011 09:01 :: armadi :: Replies: 3 :: Views: 1064
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 :: 05-18-2011 08:41 :: zeeekay :: Replies: 1 :: Views: 1002
Want to build distance finder using laser and binocular. Do you have Any idea or link to share???
Microcontrollers :: 08-13-2011 22:25 :: robojacob :: Replies: 3 :: Views: 396
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 :: 09-08-2011 22:30 :: aditya_g8 :: Replies: 2 :: Views: 2272
Go to MIKROe website, Find ultrasonic distance product. There will be also given an example code. Use it.
Microcontrollers :: 11-17-2011 02:23 :: taroot :: Replies: 1 :: Views: 1024
In general the rationale of ultrasonic distance measurement is based on measuring the time interval for the wave to travel. That means this or that timer will be inevitably utilized.
Microcontrollers :: 11-23-2011 08:11 :: min2max :: Replies: 5 :: Views: 995
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 measure the distance from t
RF, Microwave, Antennas and Optics :: 11-30-2011 22:38 :: quocvietltbu :: Replies: 1 :: Views: 716
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 :: 02-24-2012 13:09 :: MICRO THOUGHTS :: Replies: 2 :: Views: 477
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 :: 03-06-2012 03:15 :: klystron :: Replies: 2 :: Views: 499
I am also thinking of using max3806 with laser diode.
I fear, you're not aware of the complexity of laser distance measurement.
Hobby Circuits and Small Projects Problems :: 03-31-2012 04:56 :: FvM :: Replies: 16 :: Views: 1287
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 :: 04-23-2012 20:58 :: stephkre :: Replies: 3 :: Views: 1110
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 :: 05-28-2012 08:11 :: Terminator3 :: Replies: 2 :: Views: 611
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 :: 01-14-2013 13:36 :: zulnorain :: Replies: 0 :: Views: 582
As a newbie in our forum, I honestly haven?t got much experience in any electronic projects in the past. So please bear with me.
I have recently been asked to provide a solution for monitoring the misalignment (distance) of two objects within a short range (up to 30 cm). My task is to propose a cost effective solution that can monitor
Electronic Elementary Questions :: 01-16-2013 17:08 :: covman :: Replies: 4 :: Views: 792
friends i am working on distance measuring sensor and i am going to display the output on LCD i got the output but , how can I get the output in increment form mean ,just like digital counter on LCD. plz help!!!!!......
Microcontrollers :: 02-17-2013 02:11 :: asim_123 :: Replies: 4 :: Views: 256
I am measuring the distance using range sensor SRFO5.
The sensor is having the maximum range of 400 cm.
When I trigger the sensor, it releases echo signal which is used to measure the distance of the object.
The echo signal will become zero when the object is detected.
The counter value increments which measures the echo width an
ASIC Design Methodologies and Tools (Digital) :: 06-07-2013 15:41 :: xilinx1001 :: Replies: 5 :: Views: 413
What is the distance?
For distances of a few feet, an ultrasonic sound transmitter and sensor is often used since the slow speed of sound compared to light makes it much easier to measure the distance from the time the reflection takes to travel to the target and return to the receiver.
If you want to use light then the easiest would be (...)
Analog Circuit Design :: 06-21-2013 13:17 :: crutschow :: Replies: 1 :: Views: 179
To measure distance from time-of-flight, you'll need an absolute timing reference. It's missing in your setup.
Generally, you'll get three distance vectors that aren't alligned to x-y-z direction.
Microcontrollers :: 07-14-2013 12:55 :: FvM :: Replies: 1 :: Views: 241
For such short range ultrasonic range meters are easier to make. Doing it with light needs picosecond pulses and a very fast-response receiver. Check laser distance meters to see how it is done.
Analog Circuit Design :: 09-08-2013 01:56 :: jiripolivka :: Replies: 1 :: Views: 233
As I understand you need to 4 meter distance to be measured with 1 mm resolution I will recommend to you to use pulsed laser concept if target is reflective ...... I mean pulse laser with some finite time and and detect the counts for known distance for finite period then you can use the same logic for change in distance.... kindly note this (...)
Other Design :: 09-26-2013 09:42 :: milind.a.kulkarni :: Replies: 12 :: Views: 1054