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This article will explain in detail the difference between double-arm bridge and Wheatstone bridge. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Similarities: 1, are used to accurately measure the resistance of the instrument; 2, the structure has a bridge arm, that is, resistance, are the use of changes in resistance to measure changes in physical quantities. Difference: the Wheatstone bridge is mainly used to measure the median resistance, that is, the resistance that is generally greater than 1 ohm and less than 1m ohms; the double arm resistance is mainly used to measure the low value resistance, that is, the resistance less than 1 ohm.

What the double-arm bridge has in common with the Wheatstone bridge:

First, the function is the same: they are all instruments used to accurately measure resistance.

Second, the structure has a bridge arm, that is, resistance, which uses the change of resistance to measure the change of physical quantity.

The difference between a double-arm bridge and a Wheatstone bridge:

1. Different structures

1. Wheatstone Bridge is also called single-arm bridge, and only one of the arms is the resistance to be measured.

2. The resistance to be measured in the double-arm bridge is actually connected to the two arms.

Second, different practical applications

1. Wheatstone Bridge is mainly used to measure the median resistance (generally greater than 1 ohms and less than 1m ohms).

The two arms of the double-arm bridge extend out using the resistance connected by the voltage connector to get the voltage, so if the current connector is inward, the measured resistance and contact resistance are measured, so it is too large.

2. The double arm resistance is mainly used to measure the low value resistance (the resistance less than 1 ohm).

Because the Wheatstone bridge has eliminated the influence of the internal resistance of the meter on the circuit, and when measuring the low resistance resistance, it is necessary to reduce the influence of the wire resistance and contact resistance on the circuit, so the Wheatstone bridge is improved to Kelvin double-arm bridge.

This is the end of the article on "what's the difference between double-arm Bridge and Weston Bridge". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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