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Geophone Frequency Response Measurement System

A frequency response and measurement system technology, applied to instruments and other directions, can solve the problems of expensive and expensive test equipment, and achieve the effects of low cost, large measurement bandwidth and high measurement accuracy

Active Publication Date: 2015-12-02
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of measuring the frequency response of the geophone is mainly the sweeping method of the network analyzer. This method is simple in principle, fast and intuitive, but the whole test equipment is expensive, and the higher the test bandwidth, the more expensive it is

Method used

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  • Geophone Frequency Response Measurement System
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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0023] The invention provides a frequency response measurement system of a wave detector. The system uses a low-frequency square wave signal to modulate a tuna...

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Abstract

The invention provides a detector frequency response measurement system. The system uses a low frequency square wave signal modulation tunable DBR laser to output an optical signal with wavelength periodic changes. The optical signal respectively passes optical paths without delay and with delay of 1 / 4 period, carries out wave combining, and carries out beat frequency in a photoelectric detector. A microwave signal which is modulated by a low frequency square wave signal is output. The microwave signal is responded by a detector to be measured and then is input into a phase lock amplifier. The phase lock amplifier is used to detect the change rule of the amplitude of the low frequency square wave signal along with the frequency of the microwave signal, and then the frequency response characteristics of the detector to be measured can be acquired.

Description

technical field [0001] The invention relates to the technical field of photoelectric instrument measurement, in particular to a detector frequency response measurement system. Background technique [0002] A detector is a device that detects some useful information in a fluctuating signal, and is a device used to identify the existence or change of waves, oscillations, or signals. Geophones are widely used in design and production testing, and can also be used as internal components of test system signal interface units. They can be used in many test and measurement applications, such as power monitoring, video detection, scanning transmission and reflection measurement. Therefore, by measuring the relevant parameters of the geophone, it is of great benefit to improve the system performance and optimize the system structure. [0003] Frequency response is a very important parameter index of the geophone, which characterizes the ability of the geophone to process signals of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
Inventor 祝宁华邓晔刘建国李明陈伟
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI