194 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 :: 16.02.2007 15:15 :: jasmin_123 :: Replies: 1 :: Views: 455
Can anybody share info about laser distance measurement?
Thanks in advance, cat
Professional Hardware and Electronics Design :: 06.12.2007 03:31 :: kot_b :: Replies: 3 :: Views: 1277
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 :: 20.09.2009 23:23 :: sachithak :: Replies: 0 :: Views: 607
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 12:58 :: FvM :: Replies: 10 :: Views: 1101
yes! it is and you don't need any additional oscillator circuitry you can generate some kHz frequency by timer 0 and count the pules via timer 1 set a counter, do some maths and you get the elapsed time then use the following relation to find the distance travelled:
distance travelled = (speed of sound * time elapsed) /2
Electronic Elementary Questions :: 22.09.2011 07:50 :: ucsam :: Replies: 1 :: Views: 399
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 01:44 :: chaitanyakokil :: Replies: 5 :: Views: 401
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 15:06 :: sujan1380 :: Replies: 4 :: Views: 1044
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 :: 20.03.2012 23:07 :: doraemon :: Replies: 1 :: Views: 391
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 06:29 :: mrunalmehta04 :: Replies: 0 :: Views: 734
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 07:44 :: redwan_3e :: Replies: 12 :: Views: 1007
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) :: 09.03.2013 21:00 :: BradtheRad :: Replies: 1 :: Views: 133
Above equation have some error on finding Vd , omit symbol ^ in front of Beta decay . This is simple version of that V,I calculation(For convenient) such as no the geometry consideration , I had found in technical paper. But precise usage need collect statistical datum and testing in laboratory&Field . For university , I
Analog Circuit Design :: 06.08.2013 05:07 :: phongphanp :: Replies: 19 :: Views: 692
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 06:00 :: artem :: Replies: 22 :: Views: 10193
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 13:06 :: fogl :: Replies: 3 :: Views: 1902
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 06:20 :: iscom :: Replies: 1 :: Views: 1963
Search google for the same, you will find lot of projects based on ultrasonic distance measurment.
Hobby Circuits and Small Projects Problems :: 21.01.2006 04:29 :: Code Warrior :: Replies: 2 :: Views: 1371
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 00:51 :: thebiggestbangtheory :: Replies: 2 :: Views: 795
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 10:34 :: rahuljin :: Replies: 3 :: Views: 6661
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 14:36 :: mcwee65 :: Replies: 6 :: Views: 4877
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 :: 06.02.2010 22:47 :: microcon555 :: Replies: 7 :: Views: 2604
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 :: 02.03.2010 01:10 :: FvM :: Replies: 4 :: Views: 506
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 :: 26.03.2010 07:31 :: microlab :: Replies: 2 :: Views: 923
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 16:33 :: micard :: Replies: 4 :: Views: 1756
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 13:17 :: rhee2 :: Replies: 2 :: Views: 1160
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 02:58 :: piyush_bhatt :: Replies: 9 :: Views: 2631
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 09:01 :: armadi :: Replies: 3 :: Views: 857
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 08:41 :: zeeekay :: Replies: 1 :: Views: 897
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 01:31 :: arbj :: Replies: 3 :: Views: 294
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 :: 08.09.2011 22:30 :: aditya_g8 :: Replies: 2 :: Views: 1843
Go to MIKROe website, Find ultrasonic distance product. There will be also given an example code. Use it.
Microcontrollers :: 17.11.2011 02:23 :: taroot :: Replies: 1 :: Views: 815
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 :: 23.11.2011 08:11 :: min2max :: Replies: 5 :: Views: 738
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 06:38 :: drkirkby :: Replies: 1 :: Views: 565
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 13:09 :: MICRO THOUGHTS :: Replies: 2 :: Views: 378
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 03:15 :: klystron :: Replies: 2 :: Views: 418
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 :: 31.03.2012 04:56 :: FvM :: Replies: 16 :: Views: 1165
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 :: 23.04.2012 20:58 :: stephkre :: Replies: 3 :: Views: 743
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 08:11 :: Terminator3 :: Replies: 2 :: Views: 395
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 02:41 :: shom_show :: Replies: 3 :: Views: 560
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 13:36 :: zulnorain :: Replies: 0 :: Views: 297
I doubt you will get 1mm accuracy with the Sharp sensor, let alone 0.1mm.
I cannot see ultrasound being viable for that sort of accuracy.
I would have said light was your best option. A coherent laser source using interferometry would be the most accurate but expensive and incremental.
A modulated laser phase shift system might be the best
Electronic Elementary Questions :: 16.01.2013 18:25 :: keith1200rs :: Replies: 4 :: Views: 398
Which type of distance measurement Sensor you are using and What type of Output you are getting from it.
You have refresh your LCD as soon as you sense change in measurement, and then display those distance values on LCD
Microcontrollers :: 17.02.2013 03:43 :: xpress_embedo :: Replies: 4 :: Views: 163
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) :: 07.06.2013 15:41 :: xilinx1001 :: Replies: 5 :: Views: 283
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 :: 21.06.2013 13:17 :: crutschow :: Replies: 1 :: Views: 111
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 :: 14.07.2013 12:55 :: FvM :: Replies: 1 :: Views: 146
You can also heat your liquid and measure the temperature in two points on the same distance from the heating point and see the difference that will be proportional to the flow speed
b.t.w. it must be much cheaper than ultrasound
Hobby Circuits and Small Projects Problems :: 24.01.2003 09:15 :: balbes :: Replies: 9 :: Views: 2878
Spark gap discharge is always the common method of prevent ESD (electrostatic Discharge)! I want to know is there any data or measurement that how the ESD discharge voltage related to Spark gap distance?
Professional Hardware and Electronics Design :: 09.02.2003 00:53 :: Rayengine :: Replies: 11 :: Views: 7234
The PSoC Range Finder is a simple, inexpensive ultrasonic distance meter that requires only the PSoC device, two 40-kHz ultrasonic transducers, two resistors, and two capacitors. Typical applications include positioning for robotics, generic distance measurement, and liquid-level measurement without contact.
Robotics and Automatics Forum :: 11.04.2003 14:21 :: dainis :: Replies: 6 :: Views: 3582
Loadcells are reliable and cheap. Also the amplifier equipment is cheap or build it yourselfs.
Otherwise there are methods with dancing arms or distance measurement on a floating roll.
Robotics and Automatics Forum :: 31.10.2003 03:45 :: PrackeR :: Replies: 3 :: Views: 1961
In general, the IR beam intensity is modulated by a sine wave. The beam is reflected off a surface that is at the point being measured. The returned beam is detected and amplified. You end up with a sine wave with a phase shift compared to the transmitted one because of the time of flight to and from the target reflector. Ordinary electronic me
Electronic Elementary Questions :: 27.06.2004 10:21 :: flatulent :: Replies: 2 :: Views: 2108
I have to use MPU to finish a project about laser measurement distance? But I can't know how to do? If you know it. Please tell me.
Thank you. :o
Microcontrollers :: 27.09.2004 10:59 :: amazonite :: Replies: 4 :: Views: 1009