- #1
Simpler Force Sensor: Using Liquid Oil-Filled Chamber and Pressure Sensor
- Context: Automotive
- Thread starter jjohn33
- Start date
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- Tags
- Force Force applied Sensor
Click For Summary
Discussion Overview
The discussion revolves around the feasibility of using a liquid oil-filled chamber with a movable membrane connected to a pressure sensor to measure force. Participants explore the potential for this design to provide a simpler alternative to existing force measurement solutions, particularly in comparison to piezoelectric sensors.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions whether a liquid oil-filled chamber with a movable membrane can effectively measure force applied to the membrane.
- Another participant suggests that the sensor design may already incorporate a membrane that performs the described function, indicating variability in sensor designs.
- A participant proposes a specific design involving a thin movable steel membrane connected to a rod, which would translate force into pressure.
- There is a request for examples or existing designs that utilize this concept.
- One participant argues that piezoelectric sensors are a simple solution due to their lack of moving parts and direct electrical connection, questioning what the proposed design is simpler than.
- Concerns are raised about the ability of piezoelectric sensors to measure constant forces, particularly in the range of 300-400N, over extended periods.
- A suggestion is made to consider piezoresistive load sensors, which may be better suited for measuring constant loads.
Areas of Agreement / Disagreement
Participants express differing views on the effectiveness and simplicity of the proposed liquid oil-filled chamber design compared to piezoelectric sensors. There is no consensus on the best approach for measuring constant forces, and multiple competing views remain regarding sensor selection.
Contextual Notes
Participants discuss various sensor types and their suitability for different force measurement scenarios, but specific limitations or assumptions regarding the proposed designs are not fully explored.
Who May Find This Useful
Individuals interested in force measurement technologies, sensor design, and those exploring alternatives to traditional piezoelectric sensors may find this discussion relevant.
- #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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