- #1
Simpler Force Sensor: Using Liquid Oil-Filled Chamber and Pressure Sensor
- Context: Automotive
- Thread starter jjohn33
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- Force Force applied Sensor
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SUMMARY
The discussion centers on the feasibility of using a liquid oil-filled chamber with a movable membrane connected to a pressure sensor for measuring force. Participants confirm that such a design can effectively transform applied force into pressure readings, with a specific focus on handling forces in the range of 300-400N. Recommendations include exploring piezoresistive load sensors as a viable alternative to piezoelectric sensors for measuring constant loads, as piezoelectric sensors are better suited for dynamic measurements. Resources such as IEEE GlobaSpec and Omega's product offerings are suggested for further exploration of available sensors.
PREREQUISITES- Understanding of pressure sensors and their operation
- Familiarity with force measurement techniques
- Knowledge of piezoelectric and piezoresistive sensor technologies
- Basic principles of fluid mechanics related to force transmission
- Research "piezoresistive load sensors" for DC load applications
- Explore "IEEE GlobaSpec" for product comparisons of force sensors
- Investigate "Omega force sensors" for specific models and specifications
- Study the differences between "piezoelectric" and "piezoresistive" sensors in force measurement
Engineers, designers, and researchers involved in force measurement applications, particularly those seeking simpler sensor solutions for static load scenarios.
- #2
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The "sensor" shown in your figure might have a membrane inside doing just what you described. It depends on the make and model of sensor. There are many ways to do it.
- #3
jjohn33
The green part should be a thin movable steel membrane that is connected to a rod and that rod has eg 300N applied force.
The sensor transforms that force to a pressure
That was my idea,
The sensor transforms that force to a pressure
That was my idea,
- #4
jjohn33
Do you have some example to do this?
- #5
Mech_Engineer
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jjohn33 said:
What design are you hoping this concept will be "simpler" than? A piezoelectric force sensor is pretty simple considering it has no moving parts and a direct connection to an electrical circuit for logging.
See here: https://en.wikipedia.org/wiki/Piezoelectric_sensor
- #6
jjohn33
Ok thanks can it handel force for 300-400N?
Do you know some manufacturers?
Do you know some manufacturers?
- #7
Mech_Engineer
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jjohn33 said:
There are literally hundreds of options out there because this is a very common measurement need. I'd recommend doing some searching on a product comparison directory like IEEE GlobaSpec for a start, see here: IEEE GlobaSpec Search: Force Sensors.
Omega sells a lot of different sensors, including ones in your operating range. Take a look here: https://www.omega.com/section/load-cells-force-sensors-torque.html
- #8
jjohn33
Thank you I will read it
- #9
jjohn33
But if I have a constant force at e.g. 300N for couple of minutes < 10 min I thougt the piezoelectric sensors maybe cannot measured that constant load?
- #10
MRFMengineer
- 83
- 8
You may want to look into piezoresistive based load sensors as well, typically more optimized for DC loads like you mentioned.
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