Questions tagged [strain-gage]
A strain gauge measures the physical strain on an object. The most common types are a metallic foil attached to a flexible backing where the resistances changes when subjected to compression or tension.
21 questions with no upvoted or accepted answers
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Strain gauge in a voltage divider
I have a strain gauge mounted in a voltage divider as in the image below:
simulate this circuit – Schematic created using CircuitLab
where \$R_{g}\$ is the resistance of the strain gauge when ...
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AD7730 calibration failure
EDIT: The exact issue is this, the ADC has a gain register (set during internal FS calibration and again at System FS calibration) and an offset register set during system zero calibration. The ...
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Simplest way to connect a single strain gauge to HX711
I want to make a machine end-stop trigger using a strain gauge in a location where regular end-stop simply wouldn't fit - a moving part pushing against end-of-track bar, detect the bar is under strain,...
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Load cell circuit does not work on circuit simulator
I want to simulate a load cell interfacing with AD620 for amplification.
- My load cell is 40 Kg max with 2mV/V sensitivity and 10 V excitation voltage with input resistance of 405 ohm and output ...
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Why does this seem like a strange way of connecting a bridge circuit to the ADC?
I was planning to hook up a quarter bridge circuit to the AD7730LBR Analogue to Digital Converter that I bought. I was having a look at a "Load_Cell_Schematic" provided by this webpage (the download ...
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Strain gauge - wheatstone bridge: sensitivity to temperature changes
I have made a strain gauge measurement system using 3-wire quarter-bridge configuration as depicted here:
The bridge is connected to ADC (ADS1262) with ratiometric connection. R1, R2 and R3 sit on ...
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Bad AC response from bridge circuit
Followup to this question.
Hi. I have the following bridge circuit to simulate a strain gauge.
I am conducting an AC sweep of it as another part of my circuit (currently disconnected) that uses the ...
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Does shunt calibration of a sensor also correct for zero error?
In the datasheet for a load cell (shown below), it says that shunt calibration data is given, also they have mentioned the zero balance. Does the shunt calibration consider zero balance? Meaning, do I ...
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What are the trade-offs between different values of resistance for a wheatstone bridge?
I have a loadcell with a bridge resistance of 10k and I've asked the manufacturer for a new design with RTDs and a slight mechanical change, and as a consequence, the manufacturer's proposed new ...
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Strain gauge measurements with carrier frequency
In near future, I would need to do strain gauge measurements using HBMs instruments, the amplifier will be MX1615B.
In my case, the gauges will be placed near a 50Hz gearmotor and run with VFD.
As far ...
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Reduce load cell creep and drift programatically
I am trying to build a weigh scale and have read through the parameters that affect its reading in the long run. My question is can we reduce the Creep and drift of the load cell by compensation ...
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How to connect two load cells to one HX711?
I have two 5 kg load cells and one HX711. The project's goal is to connect them together, and measure the weight of the same object. I would like to get the average in order to make my calculations ...
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Loadcell strain gauge with 10 V excitation
I am designing loadcell (spec) measuring using 24-bit adc (MCP3561) with excitation 10 V. But I couldn't find the reference design for 6-wire loadcell that its sense pins connect to ref+ pin of ADC. ...
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Options for impact sensors?
I'm looking for a sensor to sense impact, let's say the sensor is placed behind a thick metal/wood casing, the impact depending on the amount of force could either deform the casing or only causes ...
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Any problem with this strain gauge configuration to increase resolution?
I'm new to using strain gauges, but I've seen the typical 1, 2, and 4 strain gauge wheatstone bridge configurations. Using the diagram below, I'm referring to where R3 is a gauge, or R3 and R4, or all ...
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Wire shield when using connector for strain gauge sensor
I have made strain gauge sensor with 1 strain gauge. Thet gauge is in "bottom" part of Wheatstone brigde (one strain gauge terminal is signal, second is connected to ground).
I'm using Sommer CICADA ...
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Remove bridge offset before ICF amplifier or at FB pin?
I'm making project where I would like to read from stain gauge sensor. It will use only one 1k ohm (or 350 ohm) strain gauge and 3 dummy resistors to complete bridge (1k or 348 ohm). I'd lik to feed ...
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A question about amplifying low level strain gauge voltages
I'm having difficulty in deciding about implementing an amplifier and whether I need it at all for a strain gauge. I never dealt with such situation before and would be very glad to have your opinions....
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Measuring the angle of finger joints
I'm working on a project where I want to very accurately (+/- 1 degree) determine the angle at which a finger is bent.
One of my main constraints is that my sensing mechanism can't interfere (much) ...
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How to read Kyowa strain cage specification?
These pics are from Kyowa strain cage specification which came with the strain cages.
In "thermal output" formula there are T1, T2, T3 and T4. What are those? I would understand if there ...
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Operational Amplifier and Strain Gauge
My laboratory involves using a strain gauge and an instrumentation
amplifier to amplify the signal from the strain gauge. The op amp schematic is shown below:
Any assistance with the following ...
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