Questions tagged [sensors]
The sensors tag has no usage guidance.
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2answers
46 views
Activating lights using a motion sensor?
I was wondering how I would configure some sort of setup to get lights like this turn on a timer once activated by a motion sensor. I want them to turn on for about 15 seconds and then turn off once ...
1
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1answer
26 views
Weight Sensor module needed
I'm looking for a low-power weight sensor which can withstand impacts of up to 1000 pounds. Is there a go-to supplier or brand for this sort of product?
I want it to give its output digitally; my end ...
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0answers
11 views
Is there a difference between piezo ceramic disc transducer and a piezo ceramic bender
I really do apologise if this is a stupid question but I for the life of me can't find an answer. I need to do a project where I measure the liquid of water in a tank using ultrasound and am planning ...
1
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1answer
23 views
Breath Sensor: A low range pressure sensor that won't be affected by humidity
I am designing a device that will measure the force of a breath through a tube. A small differential pressure sensor like this https://www.digikey.ca/product-detail/en/MPX10DP/MPX10DP-ND/464046 would ...
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0answers
17 views
Referencing for Air Quality Monitoring
I asked the same question in electronics sub, but since it is more general I am asking it here again. I bought the Sharp dust sensor GP2Y1010AU0F. Below are the graph of readings indoor for ~5 minutes,...
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0answers
56 views
Conversion from LSB to mg not making sense for accelerometer
I have a BMI088 and am trying to get an accelerometer reading.
The data sheet and specs are here: https://www.bosch-sensortec.com/bst/products/all_products/bmi088_1
The sensitivity per range is ...
0
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2answers
41 views
Compensating for a magnet in a device with a magnetometer
I'm working on a device that relies on data from a magnetometer. Unfortunately, the device also needs to have a fairly powerful magnet on it. Given that the design is fairly flexible, and within ...
0
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1answer
15 views
Contact Motion Analysis (CMA) [closed]
In this solution Helicoptor Fire Control System
CMA is used. For motion analysis we use computer vision and image processing. But what is special about CMA.
2
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2answers
37 views
Temperature sensor for PI3 thermostat
I’ve been looking for a temperature sensor for my PI3 home thermostat. I’m to the point where my app is stable and running for over 20 days with the only issues relating to the temperature sensors. I ...
1
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0answers
64 views
Build and visualize Pitch, Roll and Yaw from 9dof data offline
I am trying to build pitch, roll and yaw from sensor readings of a 9 degree of freedom sensing device.
The data look like that (in a .csv file):
...
1
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2answers
34 views
High impact force sensor?
I have a small table-like platform with two legs. Underneath each, I need to measure the amount of force. I want to use the difference between the two force measurements to estimate the platform's ...
2
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2answers
115 views
What is a Butterworth filter?
What is a Butterworth filter?
I have raw X, Y, Z acceleration sensor data that I need to smooth them from noise. I have read that a Butterworth filter is one of the most appropriate for the specific ...
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1answer
63 views
Strain gauge placement to measure a twisting beam
Where is it best to place a strain gauge to measure the twist of a beam? And what type of gauge is best?
In my application, I have a small metal part which experiences a twisting and bending force. ...
1
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1answer
71 views
Which type of sensors to analyze polluting gas from vehicle emissions
I am thinking to develop a remote-sensing applications for vehicle pollutions. In such cases generally expensive optical IR and UV devices are used because more precise. These devices are generally ...
2
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0answers
37 views
Oxygen sensors in trace gas environments
Do Oxygen lambda sensors (used in automotive applications) work in trace gas environments?
My requirements for a trace Oxygen gas sensor:
The sensor must be capable of working in an inert gas ...
1
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1answer
101 views
MQ3 Alcohol sensor
I have done my project on alcohol detection for drivers, but I don't know the minimum and maximum distances between the alcohol sensor and the driver.
What are the maximum and minimum distances?
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0answers
20 views
How to calculate slope/tilt from IMU
I have to calculate the slope/tilt from a 6 axis (3D Accelero, 3D Gyro) IMU. Are there open source libraries that help one do this or should I build it on my own? How do I get started?
Is there an ...
3
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0answers
20 views
Predictive object tracking with 2 IMUs and a stereo camera
I am quite new to this so please forgive me for any mistakes.
I am working on a simulation project and have very little clue as to what to do and I hope someone can point me to the right direction.
...
1
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1answer
98 views
What are some robust method to detect or repel lizard?
I am working on a HVAC project where lizard in going inside the electrical unit and causing wire damage and short circuit. I need to find some solution to detect or repel lizard before any ...
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2answers
29 views
What attributes of a surface are relevant to light sensors? [closed]
I'm doing a study on surfaces and I would like to describe all of the surfaces that I expect to encounter in the field and determine which ones will be the most difficult to detect. To do this, I need ...
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0answers
34 views
Could we use NE 555 Timer for industrial magnetic proximity switching circuit?
I actually need a magnetic proximity switching circuit such that
In the case of water in fuel sensor, whenever the water level in water in fuel sensor increases the magnetic float shall move and come ...
2
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1answer
326 views
What is best sensor & method to measure human height?
My application needed to measure human height on a standing kiosk. I need to attach the sensor on kiosk ceiling type top. I used different kind of ultrasonic sensor for this purpose but nothing ...
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0answers
28 views
Commercial electric motor with integrated torque sensor and torque control [closed]
Are there any commercial solutions for electric rotary motors with integrated torque sensor and torque control?
I'm only aware of www.sensodrive.de which are essentially the drives used in the DLR/...
0
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1answer
118 views
how to implement autofocus for video projector
I have a modified pico video projector that I need to add an autofocus to.
The focusing ring already has a fast stepper motor added to it.
If the focus had to be done on the middle of the projection ...
1
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1answer
74 views
Can LDR acts as a position sensor?
I am currently doing a solar tracker project. Can I use the LDR as position sensor by detecting the sunlight intensity? I mean if light intensity on LDR east is greater than LDR west, the LDR east ...
4
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2answers
145 views
Weight Sensing Problem: Need to detect 10kg load down to milligram accuracy
So I need to build some type of scale where one can place four 600mL beakers on it and measure out its weight down to a milligram level of accuracy. I'm doing this so I can dose a very small amount of ...
2
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1answer
130 views
Can lamda sensor 4.9 be used without the special LSU-IC?
I was looking into using Lambda Sensor LSU 4.9 to know the lambda value. From the datasheet, its looks though this sensors cannot be used without a special IC such as Bosch lambdatronic LT4. Can we ...
2
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2answers
41 views
Are there general-purpose acoustic FFT sensors for plant diagnostics?
For the purpose of detecting a defect or failure in a machine, it is often practical to physically listen to any abnormal noises that a machine might be making, and even use a simple stopwatch to ...
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1answer
39 views
Would it be physically possible for rotating tank armor to move in front of an incoming projectile fast enough to intercept? [closed]
The core challenge of building a tank is deciding where to focus its armor and how much speed / cost you're willing to trade for protection, so this got me thinking, with modern detection technology, ...
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1answer
30 views
Deriving the First order response of a sensor
I'm trying to derive the first order response of a sensor with step input. However, I'm stuck at step just before conducting the Laplace transform. In the following image, how is the left side equal ...
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1answer
99 views
How can I connect a silicon hose with 2mm inner diameter to a smaller 1,9mm port
The biggest diameter of my pressure sensor input port has a size of 1.93 mm. The silicon hose which I want to connect with the sensor's port has an inner diameter size of 2.0 mm.
My honeywell ...
5
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1answer
161 views
How can I detect black spots?
I am researching about ways to continuously determine black spots (size 50+ micron) in our product stream. This stream consists of imperfect spherical polymer beads (size 3 mm) of different materials (...
0
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3answers
104 views
What is this device?
So recently I went to Supercomputing 17 conference and picked this from a booth.
I would like to know as to what this device is? What's its name? Where to find its documentations?
Thanks
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0answers
41 views
Is there any sensor that can precisely determine the trajectory of an object on Earth (to about 1 cm)?
I have to determine whether or not a certain machine's roller chain is moving sideways along its path. It's a large and slow-moving machine (about 50 m large, with rollers moving at about 60 m/hr). I'...
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2answers
64 views
Is there a way to determine the colour information of light emitted from an LED?
Say you have an LED light that emits green light. Are there sensors out there that could accurately determine the colour information of the green light? Such as the relative values of red, blue and ...
1
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2answers
82 views
Can you detect the operation of a wireless radio (or other wavelength) receiver?
I am Comp-sci student doing a software engineering paper about designing a program, planning the software like you were actually planning a real-life software project, short of writing actual pseudo-...
0
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1answer
59 views
Is the pressure of the gas identical to the static pressure of the liquid in the diagram?
In my application the liquid would be tapped from a fast-varying flowrate, and I want to measure the static pressure change during this by measuring the air pressure above it. Will this work?
4
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1answer
134 views
Calculating gyro data from accelerometer, pitch, roll and yaw
I am currently collecting accelerometer and attitude data using smartphone sensors. Data is collected at 100Hz over 2.5 seconds. Of which there are 250 accelerometer points and 250 points representing ...
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0answers
53 views
Is there a 5% range CO sensor with a response rate higher than 1Hz?
I'm building a portable emission analyser which measures emissions from a tailpipe, to aid in troubleshooting and tuning an engine. For this, I need a $\text{CO}_{2}$ , a $\text{CO}$, and an $\text{O}...
1
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1answer
43 views
Thermistor - Steinhart-Hart Coefficients
In order to identify Steinhart-Hart coefficients for a thermistor, three known temperatures may be used to find three resistances.
What is the best way to choose these temperatures to calibrate ...
0
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1answer
56 views
Low power, large weight sensor needed
I am looking for a weight sensor which has a range from 2000 kg to 30000 kg to measure the weight of passing trucks.
Accuracy is not very important. Power use is very important, typically 3.3v.
Do ...
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votes
1answer
86 views
Accurately measure the distance from chest to back
I want to measure the distance between the back of a human body, and the chest. This is denoted in the image below, where Point A is the back and Point B is the chest:
I do not wish to measure the ...
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0answers
31 views
Detecting potholes through Vibrations
To begin with, please excuse my little knowledge, I'm currently a data science student and unfortunately have very little knowledge of physics, engineering, DSP but I am willing to learn.
Currently, ...
0
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2answers
130 views
How to measure above 100K RPM?
I'm trying to measure the rotational speed of a turbocharger, but the laser tachometer I have can only measure up to 99,999 RPM and it isn't enough (display starts to output letters) and devices that ...
0
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2answers
44 views
Determining change of object over time ( diameter )
I am currently attempting to solve the following problem. Say that I have an object that can expand and contract, given some external force. What I want to know is how much it has expanded, or ...
1
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1answer
450 views
How to increase the sensitivity range of MQ3 Alcohol sensor?
I am using an MQ3 sensor for alcohol detection but the sensing distance is short. Is there any alternative approach or solution to detect alcohol present in air from a longer distance?
For example, ...
3
votes
4answers
219 views
How to Measure Air Flow in a Large Tunnel at Various Different Points?
I am a student who is interning at a company this summer, and I've been put in charge of its first R&D project which will require me to collect a lot of data. The machine with which I am working ...
0
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1answer
56 views
How to measure electro-mechanical coupling?
I have mounted a piezo-ceramic ultrasonic transducer (MODEL # SMD10T2R111WL, Vendor Website: PIEZO CERAMIC DISC 10X2MM R 215 KHZ WIRE LEADS) under a plastic tank using epoxy. Please see the picture ...
3
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3answers
877 views
Send sensor signals to WiFi network
I want to build a home automation system by hooking up various sensors (e.g., passive IR motion sensors, magnetic door contact switches, vibration detectors, etc.) around the house to detect things ...
3
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0answers
43 views
Placement of a refractory wall excess temperature sensor?
I am working on a burner management system for a gas/coal fired pulp dryer. We are providing a thermocouple temperature switch on the roof of the firebox for an Excess Temperature Limit Interlock (per ...
