Alternating/direct current calibration source

A current calibration, AC and DC technology, applied in the direction of measuring electricity, measuring electrical variables, and components of electrical measuring instruments, etc., can solve the problems of small range and low measurement accuracy, and achieve high stability, high display accuracy, and output power big effect

Inactive Publication Date: 2011-11-23
YUNNAN INST OF MEASUREMENT TEST TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The common point of these devices is that the measurement range is small, the measurement accuracy of AC parameters and frequency spread is low, which can no longer meet the needs of the development of national economy, national defense and instrument technology. meaningful

Method used

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  • Alternating/direct current calibration source
  • Alternating/direct current calibration source

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Embodiment

[0020] The AC and DC current calibration source of the present invention includes an input device 1, a control circuit 2, a signal conversion circuit 3, a power amplifier circuit 5, a sampling feedback circuit 4 and a display circuit 6, and the input device 1 inputs the input signal to the control circuit 2. The output signal of the control circuit 2 is sent to the power amplifier circuit 5 after the signal conversion circuit 3, and the output signal of the power amplifier circuit 5 is divided into two channels, one of which is sent to the sampling feedback circuit 4, and the other signal is output to the display circuit 6 . The input device 1 can be one of a keyboard, a mouse, and a scanner, and has an RSC interface.

[0021] The technical solutions of each part are as follows:

[0022] The signal conversion circuit 3 includes a DC voltage reference device, a digital frequency synthesizer, a digital wave synthesizer, and the DC voltage reference device, a digital frequency s...

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Abstract

The invention relates to an alternating/direct current calibration source applied to ammeter calibration and scientific research testing. The calibration source comprises input equipment, a control circuit, a signal conversion circuit, a power amplifying circuit, a sampling feedback circuit and a display circuit, wherein the input equipment is used for inputting the input signals to the control circuit; the output signals of the control circuit are sent to the power amplifying circuit by the signal conversion circuit; the output signals of the power amplifying circuit are divided into two ways; and one way of signals are sent to the sampling feedback circuit and the other way of signals are output to the display circuit. The calibration source has high output power, high stability and high display precision and is convenient to operate.

Description

technical field [0001] The invention relates to an AC and DC current calibration source used in ammeter verification and scientific research testing. Background technique [0002] As an important parameter of electric energy and the basic quantity of electrical measurement, current value is widely used in electroplating, electrometallurgy, motor manufacturing and maintenance, batteries and electric locomotives, aviation and even aerospace and other fields. The magnitude of AC and DC current ranges from a few amps, tens of amps to hundreds of amps, thousands of amps or even tens of thousands of amps. The accurate measurement of these AC and DC current values ​​is directly related to the operation effect of the system, the product quality, and even the success or failure of the entire system. [0003] In my country's provincial and municipal level, large and medium-sized enterprises and national defense industry, a large number of current value transmission / traceability syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28G01R35/00
Inventor 陈万才张自长朱自科苏红叶长飞曾舒帆李亚娟
Owner YUNNAN INST OF MEASUREMENT TEST TECH RES
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