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0answers
49 views

Ultrasonic distance sensor with no microcontoller

For a task we have to come up with a way to use a 40 kHz ultrasonic transmitter and receiver pair to measure distance. The output must be an analogue signal proportional to the distance to the object. ...
1
vote
1answer
123 views

How can I measure distance travelled in cm without gps?

I was asked to build a circuit that will measure the distance travelled of a small vehicle, like a lawn mower. There's a requirement that it would measure distance travelled in cm/sec. GPS is too ...
4
votes
2answers
88 views

Modeling long wires in circuits

What's the proper way to model really long wires in circuits (18ga, ~1500 ft)? I'm aware that over long lengths start to accrue non-ignorable resistances. I'm wondering if they start to get other ...
0
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1answer
68 views

Do flat distance lasers exist?

In short, I want to create a flat laser plane that knows where it's being penetrated. If flat distance lasers do not exist, what other options do? I considered using several regular distance lasers ...
0
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0answers
44 views

Ultrasonic sensor pair operation

I have had success with using SR04 to measure distance from the SR04 location to nearest obstacle. Now I want to be able to measure distance of two mobile location one mounted with ultrasonic ...
2
votes
1answer
116 views

HC-SR04 ping sensor cutting out at ~3 meters

I have some HC-SR04 ultrasonic sensors that I purchased from eBay not long ago. I hooked one up to an Arduino and wrote a quick sketch to test them, and found that none of them work consistently. It ...
0
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0answers
35 views

Displacement using accelerometer using known constraints

I am looking to find out the amount of displacement (x,y,z) over a period of 3 seconds using an accelerometer, in this case, the ones found on the iPhone. The purpose is to attach the iPhone on the ...
0
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0answers
51 views

make hc-sr04 receive from another one

I have 3 ultrasonic Sensor (HC-SR04), i want to use one of them as transmitter, and the other as receiver, i want to let the first one send ultra Sonic waves and the other receive these waves from the ...
0
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0answers
40 views

How to connect ultrasonic distance sensor

I can't find any schematic example how to connect sensor which is used in cars as parking sensor to measure distance. (where is only one transducer sensor used as RX and TX) Can someone give me some ...
14
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4answers
765 views

What are my options for detecting the position of a small moving metal object?

This is an airgun pellet trap: I fire small metal pellets at it (4.5mm = .177" in diameter) at up to 120 m/s = 390 fps. What are my options for detecting the X / Y position at which it enters the ...
-1
votes
2answers
63 views

Non-line-of-sight distance approximation between trasmitter and receiver

I have one stationary object in a 2d plane (no z-axis). Let's say this stationary sphere is in the middle of a rectangular plane. I have another object in the same rectangular plane that is in motion ...
0
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0answers
34 views

Does higher clock speed equate to higher resolution of distance measurement using RF?

I am trying to create a simple measurement system using RF but have found only devices that have fairly large windows of accuracy (+/- 1ft is the best one I've found yet). If I want to measure the ...
5
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3answers
295 views

How do utilities calculate transmission lines impedance?

I'm an electrical engineering student getting into Transmission Circuit Analysis, and a question came out to me: How do utilities measure their transmission lines impedance? Do they use special ...
3
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2answers
143 views

Under water distance measurement

For a laboratory / field test, I'm looking for an easy solution to measure the soil surface elevation. The test runs a flow on a bed. When the erosion takes place the sediment concentration goes high ...
0
votes
2answers
79 views

Short distance detecting device

I'm looking for a sensor that would activate at a certain distance from the magnet or whatever would be signaling the location. The distance would range from 2-30cm and there would be obstacles ...
3
votes
2answers
426 views

Accelerometer double integration error

I wanted to use an accelerometer or IMU to measure speed and displacement over a period of about 1 minute or 400m. From this answer I found at stackoverflow, the error propagates at a rate of \$t^2\$ ...
0
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0answers
85 views

How to calculate distance between two objects(robots)?

If I have two soccer robots, and want each robot knows the distance between itself and it's teammate, how can I do that? (without external supervisor camera)
0
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2answers
37 views

Design options for tracking relative orientation of two elements

Background: I need a system of two discrete elements where one of the elements can continually track the distance and direction to the other, and their respective orientations. The specific ...
1
vote
1answer
90 views

How far can I wire a Sensor or an electrical component that it would work?

I had this doubt in my mind. I wanted to know the range till which a sensor could be attached so that it works. Suppose I have a setup, in which my main circuit is in a room and I have a PIR sensor or ...
0
votes
1answer
94 views

What type of equipment can I use to detect object 3d distance?

I would use a kinect but that's too cumbersome. I want to ditch the camera and the microphones leaving me with the "3d sensor" but what is this mystery sensor even made of? I would use some sort of ...
0
votes
1answer
97 views

how to safely increase the distance between ws2811 chips

I'm designing a pick to light system based on ws2811 chips + leds and an mcu like arduino uno or mega. The average distance between the independent light modules will be about 2m which is in the 10m ...
0
votes
1answer
183 views

What's the best method of measuring displacement and speed without resorting to GPS?

Is it possible to determine the displacement, speed and acceleration of someone while running, by using methods like dead reckoning, sensor fusion or other, and sensors like accelerometers, ...
0
votes
1answer
99 views

Can ultrasound be used to determine distance without line of sight?

Is it possible to determine the distance between 2 devices (using phase shift, time of flight or any other method) without line of sight? In the affirmative case what's the precision and accuracy for ...
0
votes
1answer
77 views

Precise Tracking of Coordinates across small 2d plane Wirelessly [duplicate]

First off, I'd like to say my background is definitely more in the realm of software than hardware so I might be a bit of a beginner about certain things.. That being said, I have this idea that ...
2
votes
2answers
112 views

Measuring the distance between two points electrically

I am trying to build a real time location system(RTLS). I have a arena of 10 x 10 meters in dimension. And would like to track the position of the object moving in the arena with a precision of within ...
0
votes
2answers
103 views

Is there a sensor capable of measuring distance?

I'm looking for a simple way to measure the distance between 2 devices, basically 1 device will be placed in each leg and one of them will measure the leg stride, at any moment, by calculating the ...
0
votes
1answer
51 views

Measuring Stride distance wirelessly

I'm trying to fit two sensors in a shoe each (such that each shoe has one sensor). their purpose being to calculate the stride length of a person, as a person takes a stride, the distance between two ...
1
vote
1answer
73 views

Could a barcode scanner be used to get surface depth information?

(if tl;dr, go to the part where it says "actual question") this is probably a very obscure question, but: I'm working on a rather complex art installation with computer-generated sculptures, and I'm ...
1
vote
2answers
74 views

Is there any repeater with power amplifier? [closed]

I installed sensor module connected with controller. Those are connected with 6-wire cable, and it consists of 2-wire power(5V & GND), 4-wire signals(0~5V analog). First time, I thought distance ...
1
vote
1answer
65 views

How can I implement a proportional error control scheme with op amps?

So I have an IR distance sensor that I would like to use to keep two wheels (with DC motors) travelling parallel to the wall beside them. I have these proportional error control formulae to keep the ...
0
votes
0answers
37 views

How does the impedance of the source effect the positive sequence impedance measurements of distance relays?

How does the impedance of the source effect the positive sequence measurements of distance relays in relation to power system protection? I wrote that increasing the source impedance decreases the ...
0
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4answers
94 views

Local positioning system

Let me start by stating that I am a student with very little experience so I am starting at square one, so please bear with me. Requirements I am looking to create a local positioning system between ...
4
votes
1answer
204 views

How can I determine a maximum run length for CANbus?

I'm using CANbus to communicate between two circuit boards. 120 ohm termination resistors on either end. Transceivers are MCP2561 and ISO1050. Bit rate is in the hundreds of kilobits/second. Medium is ...
1
vote
4answers
940 views

How do I determine the distance from a magnet using Magnetometer?

I have a triple-axis magnetometer and a magnet, and I am trying to calculate the relative position of the magnet from the magnetometer. The magnetometer outputs the strength of any fields detected in ...
0
votes
1answer
129 views

Distance confusion about Shuncom SZ05-ADV ZigBee module

I ordered this module looking at the datasheet that it has a range of 2000m LOS distance. But now when I test it, I can receive signal from a maximum of 50m distance! It sends 2.4GHz signals. As far I ...
2
votes
2answers
156 views

Sensoring gokart pedals?

I want to make a ATMega-based module to record several parameters of a go-kart while driving - pedals position, speed of the wheels and g-forces. I have a problem with choosing how to measure gas and ...
6
votes
6answers
833 views

Miniature wireless distance sensor

I am novice in electronics, so please bear with me. I am searching for a small distance sensor (as small as possible) that I can use to measure a distance between 0 and 30 cm precisely (precision ...
0
votes
1answer
598 views

How can the signal strength of an RF signal be measured?

I am a graduating ECE student and we are currently making our project study. Our group would like to make a proximity indicator. Initially, we planned to use Radio Frequency for this. The idea was to ...
5
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2answers
1k views

How the time is converted into distance by multiplying it with 17,000

The general formula for Distance to Time conversion or vice versa is, Velocity = Distance / Time I have been implementing HCSR04 Distance Sensor, Datasheet: ...
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votes
1answer
264 views

Trying to figure out the distance my computer is from my Bluetooth peripheral via RSSI. Is it possible?

I'm having a great deal of trouble figuring it out. I know it's far from exact, but I would like to have a reasonable estimate in meters. Right now my device is reporting back to my the RSSI value ...
2
votes
1answer
597 views

How to collimate ultrasonc beam from proximity sensor HC-SR04 in measurng distances of 3 meters?

I am currently doing a project for bicycle overtaking safety in which an approaching vehicle or cycle from behind is found through ultrasonic sensor and indication is given to the rider. I had a ...
5
votes
1answer
135 views

Powering a modem over extreme distance (~2k feet)

We live in a rural area and have about a 2000 foot run from the end of our driveway to our house. The cable company wanted quite a bit of money to run internet to our house, but there's a drop at the ...
2
votes
2answers
683 views

Arduino Uno and Sonar Sensor - how long can the wire be before performance suffers?

I am setting up an Arduino Uno with a sonar sensor from Maxbotix (http://www.maxbotix.com/Ultrasonic_Sensors/MB7360.htm). The sensor will be powered directly from the Arduino (5V). The sensor needs ...
12
votes
3answers
3k views

Can an optical mouse be used to measure distance down to 1-10μm?

I am working on a home-built CNC machine that uses stepper motors and MXL timing belt for the machine movement. Because I'm using steppers, there is no feedback to the controller about the actual ...
9
votes
4answers
780 views

Why wavelength is not measured with a unit of time?

While learning Fourier transforms, I have this little doubt about wavelength. Why is that wavelength for a sine wave, or any other wave, is measured with a unit of distance? If it travels w.r.t. ...
7
votes
2answers
273 views

real time short distance range finder and visual output

I'm badly visually impared in one eye and find judging distances while walking downhill hard. My goal is to create a real time range finder than can display the distance of the next step(s) while at ...
0
votes
1answer
327 views

How to measure distance/position accurately?

I am wondering if there is a way to measure distance between two movable points (e.g., the first point is on the hand and the second point is on the back of the human body). I was looking at ...
6
votes
3answers
200 views

How can I electronically measure tilt/compression of a pliers or alligator-clip?

I would like to electronically measure the width (really the compression/extension) to which an object's constituent blades have been stretched. Or alternatively, I could measure some other parameter ...
0
votes
1answer
537 views

Problem with Arduino and 2 Sharp IR sensors

I have 1 Arduino and 2 IR Sharp GP2Y0A02YK0F proximity sensors, I connected 1 sensor, with mounted capacitors between GND and VCC (100nf, 10000nf) Everything is fine, I have good values, but when I ...
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vote
2answers
160 views

Recommended Sensor? Distance - High Heat & Dusty

I'm after a sensor and I'm wondering what would be the best type for the following. Requirements - Accurately measure in the 5-10mm distance range, +/- 1mm. Sense small undulations in a surface ...