Product Introduction: Single-phase digital voltmeter
Usb Current And Voltage Meter is a current and voltage testing instrument with digital display function. With the continuous development of digital technology and microcomputer technology, digital display meter and new display and recording instrument with single chip microcomputer as the core are more and more widely used in the field of industrial automation and industrial control. Like the pointer table, the digital display meter matches with various sensors and transmitters to measure electricity, pressure, level, liquid level, flow rate, temperature, etc., and display the measured results directly in digital form.
The digital display table must first convert the continuously changing analog quantity into the intermittently changing digital quantity (A/D conversion), and then the counter (if the input signal is a digital quantity, then the counter directly), registers, decoders, and finally displayed on the liquid crystal display or LED digital.
In fact, most of the Usb Current And Voltage Meter is based on the voltmeter as the main body, a large number of physical quantities are converted into the corresponding electrical signals after inductive transmission, the input part of the instrument will process these electrical signals into conventional voltage signals, so most of the digital display meter's main body is just a voltmeter, the difference is the input conversion part.
Organizational structure:
Usb Current And Voltage Meter should have A/D conversion, nonlinear compensation and scale conversion three parts.
a, A/D conversion: the analog quantity is converted into a digital quantity, there is a special single chip.
b, nonlinear compensation: most of the measured parameters and display values show a nonlinear relationship, in order to eliminate nonlinear errors, must be added in the instrument nonlinear compensation circuit. Commonly used methods are: analog nonlinear compensation method, nonlinear digital-to-analog conversion compensation method, digital nonlinear compensation method and so on.
c, scale transformation: there is often a proportional relationship between the measured value and the engineering value, the digital display table should not be the input value, but the actual engineering value, so the scale transformation should be carried out. General digital display meter display range is full range can be set.
d, digital display current voltmeter can be attached with functions.
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