Modern Detection Technology Course: Measuring Displacement with Electric Bridge
1. Content: bridge measuring displacement
The bridge measured displacement is described as follows
Use 2 linear potentiometers (total resistance value R0=5000Ω, total length L0=100mm), and 1 E=10V DC power supply to form a full-bridge circuit for detecting displacement x, when the measured displacement When x drives the brushes P1 and P2 of the potentiometer to move, the output voltage Uo of the bridge changes. (Hint: x drives the brushes of the two potentiometers to move at the same time)
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Requirements: (1) Make connections in the figure below (add DC power supply E and voltmeter G by yourself), and draw a circuit structure diagram.
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(2) Deduce the relationship between x and Uo.
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(3) Use circuit simulation software for simulation verification.
2. Circuit connection
- Requirements: (1) Make connections in the figure below (add DC power supply E and voltmeter G by yourself), and draw a circuit structure diagram.
The circuit structure diagram is shown below
3. Circuit simulation
- (3) Use circuit simulation software for simulation verification.
Use Multisim software to draw the schematic diagram as shown below
The experimental simulation with Multisim software is as follows
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Simulation 1
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Simulation 2
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Simulation 3
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Simulation 4
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Simulation 5
4. The relationship between x and Uo
- (2) Deduce the relationship between x and Uo.
The relationship between x and Uo is as follows
