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Phase angle calibration device of ultra-low frequency response analyzer

A technology of frequency response and calibration device, applied in measurement devices, instruments, measurement of electrical variables, etc., can solve the problems of incomplete calibration methods, phase angle calibration can not fully cover the actual frequency and phase angle range and other problems

Inactive Publication Date: 2019-06-14
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the above problems, to provide a phase angle calibration device for ultra-low frequency frequency response analyzers, which overcomes the fact that the frequency response analyzer phase angle calibration cannot completely cover the actually used frequency and phase angle ranges in the existing calibration means , and the problem that the calibration method of the conventional frequency response analyzer is not completely consistent, to realize the traceability of the value of the frequency response characteristics of the servo unit tester

Method used

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  • Phase angle calibration device of ultra-low frequency response analyzer
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  • Phase angle calibration device of ultra-low frequency response analyzer

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Embodiment 1

[0022] Such as figure 1 Shown is a schematic diagram of the line connection of the ultra-low frequency frequency response analyzer phase angle calibration device in Embodiment 1 of the present invention. The ultra-low frequency frequency response analyzer phase angle calibration device of the present invention includes an input and output signal conditioning module and multiple groups of frequencies and shifters. The two parts of the phase module realize precise phase shifting of various phase angles under multiple groups of frequencies through the combination of frequency points and phase points, and realize accurate calibration of the phase angle of the ultra-low frequency frequency response analyzer of the servo unit tester.

[0023] The input and output signal conditioning module is composed of an inverting voltage follower composed of a high-precision and low-drift operational amplifier OP200 to realize the conditioning of the input and output signals. The signal Ui is inp...

Embodiment 2

[0025] Such as figure 2 As shown, it is a schematic diagram of the line connection of the ultra-low frequency frequency response analyzer phase angle calibration device of Embodiment 2 of the present invention; the input and output signal conditioning module is realized by an inverting voltage follower composed of a high-precision and low-drift operational amplifier OP200. For the conditioning of input and output signals, the signal Ui is input through the resistor R31, and after passing through the voltage follower (OP200), the signal Ui becomes SW1; the input signal SW2, after passing through the voltage follower, the signal SW2 becomes Uo; the inverting voltage follower OP200 The input end is connected with R31, which is a proportional resistor, among which, 1 represents the output end of op amp 1, 2 represents the low end of op amp 1 input, 3 represents the high end of op amp 1 input, and 4 represents the low end of the power supply voltage. The output end is connected wit...

Embodiment 3

[0027] Such as image 3 Shown is the circuit connection schematic diagram of the ultra-low frequency frequency response analyzer phase angle calibration device of Embodiment 3 of the present invention; the input and output signal conditioning module is realized by an inverting voltage follower composed of a high-precision and low-drift operational amplifier OP200. For the conditioning of input and output signals, the signal Ui is input through the resistor R31, and after passing through the voltage follower (OP200), the signal Ui becomes SW1; the input signal SW2, after passing through the voltage follower, the signal SW2 becomes Uo; the inverting voltage follower OP200 The input end is connected with R31, which is a proportional resistor, among which, 1 represents the output end of op amp 1, 2 represents the low end of op amp 1 input, 3 represents the high end of op amp 1 input, and 4 represents the low end of the power supply voltage. The output end is connected with R32 is ...

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Abstract

The invention discloses a phase angle calibration device of an ultra-low frequency response analyzer, and belongs to the technical field of special test device measurement technique. The phase angle calibration device comprises an input and output signal regulating module and a multiple-group frequency and phase shifting module, and the input and output signal regulating module is connected with the multiple-group frequency and phase shifting module through a test cable. According to the phase angle calibration device of the ultra-low frequency response analyzer, the problems that the phase angle of a frequency response analyzer can not totally cover actually-used frequency and a phase angle range through an existing calibration method, and the existing calibration method is not totally suitable for a nomal frequency response analyzer calibration device, the traceability of value of a frequency response characteristic of a servo unit tester is realized, and the phase-shifting accuracyis greater than + / - 0.25 degree.

Description

technical field [0001] The invention relates to a phase angle calibration device for an ultra-low frequency frequency response analyzer, and belongs to the technical field of special test equipment measurement. Background technique [0002] Servo unit tester, as an important stand-alone machine for verifying the basic performance of servo mechanisms, plays an important role in the scientific research and production of servo mechanisms. [0003] An important performance of the servo unit tester is to measure the frequency response characteristics of the servo mechanism, and its value accuracy and reliability directly affect the product performance of the servo mechanism. However, the existing methods are mainly realized by the servo equivalent, and there is a problem that the phase angle calibration of the frequency response analyzer cannot completely cover the frequency and phase angle range actually used, and is not completely consistent with the calibration method of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 王兵张鹏程高翌春刘晓旭印朝辉张修建张铁犁
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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