A high-stability, high-precision phase-amplitude detection device
A high-stability, amplitude detection technology, applied in the field of signal processing, can solve the problems of complex principle and circuit of the phase-amplitude detection device, poor temperature stability and consistency, large phase-amplitude drift, etc., to achieve versatility and stability enhancement, The effect of simple debugging and reducing truncation error
Active Publication Date: 2016-09-21
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
Analog devices will produce various errors due to external interference or their own lines, which seriously affect the measurement accuracy, and the long-term phase amplitude drift is large, and the temperature adaptability is poor, so it cannot be used in applications that require high precision, high stability and large input signal interference. occasion
The principle and circuit of the phase-amplitude detection device implemented by a separate digital circuit are complicated, there are many separate devices, the debugging workload is large, and the temperature stability and consistency are poor.
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[0018] refer to figure 1 , figure 2 , the present invention comprises a first filter 1, a first transformer 2, a first numerically controlled amplifier 3, a first analog-to-digital converter 4, a digital processing unit 5, a second filter 6, a second transformer 7, and a second numerically controlled amplifier 8 , a second analog-to-digital converter 9 and a power supply 10 . figure 1 It is an electrical principle block diagram of the present invention, and the embodiment is according to figure 1 Connecting lines, the first and second filters 1 and 6 use commercially available LC bandpass filters of different frequency bands as filters according to different application frequency bands, and their functions are to filter out low-frequency interference and high-frequency interference clutter, and prevent / D conversion produces aliasing. The first and second transformers are made of commercially available RF transformer ADT3-1T, which provides a 1:3 impedance transformation, ...
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The invention discloses a high-stability, high-precision phase-amplitude detection device, which can be used in an accelerator phase-amplitude stabilization system extension and can also be used as a high-precision phase meter and a wave detector. It is composed of filter, transformer, numerical control amplifier, analog-to-digital converter, digital processing unit, power supply and other components. It controls the numerical control amplifier through the digital processing unit to make the analog-to-digital converter work at the best sampling signal amplitude and perform digital sampling. After the signal passes through signal processing algorithms such as phase-locked loop, digital down-conversion (DDC), and digital phase detection, digital information such as phase difference and amplitude are obtained. The invention has the characteristics of high precision, high temperature stability, high consistency and high reliability, and is especially suitable for an accelerator phase-amplitude stabilization system or a high-precision phase meter and wave detector.
Description
technical field [0001] The invention relates to a high-stability and high-precision phase-amplitude detection device in the field of signal processing, and is especially suitable for an accelerator phase-amplitude stabilization system or a high-precision phase meter and a wave detector. Background technique [0002] Phase-amplitude detection is widely used in communication systems, stability systems, industries, etc., and can be used in power systems, ion accelerator phase-amplitude stabilization systems, and high-precision phase-amplitude testing. Traditional phase and amplitude detection devices are mostly implemented in the form of analog circuits or separate digital circuits. Analog devices will produce various errors due to external interference or their own lines, which seriously affect the measurement accuracy, and the long-term phase amplitude drift is large, and the temperature adaptability is poor, so it cannot be used in applications that require high precision, h...
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IPC IPC(8): G01R25/00
Inventor 张红涛李强李靖杨锁强林兴隆高焕英
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP