Contents
What is sensing circuit?
A current sensing circuit or board monitors electronic current flow in a number of applications. This is often referred to as “shunt resistor current measurement.” The current sensing circuit creates a proportional current or voltage output to the current in the path being measured.
Why current is important?
Current is one of the most important and fundamental elements within electrical and electronic technology. The current flowing in a circuit can be used in a variety of ways from generating heat to causing circuits to switch, or information to be stored in an integrated circuit.
What are sensing circuits used for?
Ultrasonic sensors with circuits can be used for measuring the distance of an object. This method is used, where we cannot implement the conventional methods to measure like inaccessible areas such as high temperature or pressure zones, etc.
Which is the best method for sensing current?
1- Indirect method: such as current transformers (in the figure) and Hall effect sensors, which relies on Faraday’s law of induction to sense current in a circuit and convert it to a proportional voltage. These methods are suitable more for high current systems.
How does a low side current sensing circuit work?
As shown in Figure 1, low-side current sensing connects the sensing resistor between the load and ground. Normally, the sensed voltage signal (VSEN =ISEN × RSEN) is so small that it needs to be amplified by subsequent op amp circuits (e.g., non- inverting amplifier) to get the measurable output voltage (VOUT).
How to use a circuit to measure current?
Current Sensing Circuit 1 Ways to Measure Current. 1- Indirect method: such as current transformers (in the figure) and Hall effect sensors, which relies on Faraday’s law of induction to sense current 2 Measuring Current by Multimeter 3 High-side and Low-side Sensing. 4 Differential Amplifier. 5 Video Tutorial With Example.
How do you close a direct sensing circuit?
1- cut the circuit. 2- use the “current” multimeter input jack, not the voltage one. 3- put the probes as the figure to close the circuit. Direct sensing has 2 methods: High-side and low-side sensing. It depends on the position of the shunt resistor with respect to the load.