What Is Voltage Measurement?

Voltage refers to the work done by an electric field force to move a unit of positive charge in an electric field from one point to another. Voltage measurement is an important content of electronic circuit measurement. It is the basis of many electrical parameter measurements.

The work done by an electric field force to move a unit of positive charge in an electric field from one point to another is called a voltage. Voltage is a basic parameter of electronic technology measurement. Voltage measurement is the basis of electronic measurement. Many electronic devices are voltage related, such as

The methods of measuring AC voltage include detection method, sampling method, thermoelectric method, thermal radiation measurement method and compensation method.

Voltage measurement analog electronic voltmeter

Analog electronic voltmeters generally use a magnetoelectric current meter head as an indicator. Because the magnetoelectric ammeter can only measure DC current, when measuring DC voltage, it can be directly amplified by attenuation or attenuated into a certain amount of DC current. The pointer of the DC meter head is deflected to indicate its size. -DC converter, convert the measured AC voltage into DC voltage proportional to it, and then measure the DC voltage.

In analog electronic voltmeters, most of them use rectification to convert AC signals into DC signals, and then indicate the reading through the DC meter head. This method is called the detection method; there are also thermocouple conversion methods and formula conversion methods. ^[2]

Digital voltmeter for voltage measurement

The digital voltmeter first uses the analog-to-digital (A / D) conversion principle to convert the measured analog voltage into a corresponding digital quantity, and directly displays the magnitude of the measured voltage with digital. Compared with analog voltmeters, digital voltmeters have the advantages of high accuracy, fast measurement speed, strong anti-interference ability, high degree of automation, and easy reading.

The most basic and common digital voltmeter is a direct current digital voltmeter (DVM), which can be used to measure the AC voltage, current, resistance and other power with different converters or sensors at its input. It is an essential part of many digital measuring instruments. ^[2]