CN106997004A - A kind of high-precision intelligent frequency displacement, phase-shift measurement device and method - Google Patents
A kind of high-precision intelligent frequency displacement, phase-shift measurement device and method Download PDFInfo
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- CN106997004A CN106997004A CN201710442824.8A CN201710442824A CN106997004A CN 106997004 A CN106997004 A CN 106997004A CN 201710442824 A CN201710442824 A CN 201710442824A CN 106997004 A CN106997004 A CN 106997004A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/12—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into phase shift
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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Abstract
The invention discloses a kind of high-precision intelligent frequency displacement, phase-shift measurement device and method, for accurately measuring component and its two-port network frequency displacement and phase shift, including signal generating module, amplification filtration module, follower, microprocessor and input, outlet terminal；Signal generating module is connected with amplification filtration module, amplify the output end connection input terminal of filtration module, outlet terminal is connected with microprocessor, one end of follower is connected with input terminal, the other end is connected with outlet terminal, microprocessor connects host computer by communication interface, and microprocessor is connected with memory module, input equipment and display module.The present invention produces electromagnetic wave signal by signal generator, amplified filtration module amplification filtering, frequency displacement, the phase shift of tested component and its two-port network, output end signal sends into microprocessor processes together with follower signal, realizes the high-acruracy survey moved to electronic component and its frequency decay of two-port network and phase angle.
Description
Technical Field
The invention relates to the field of electromagnetic wave frequency shift and phase shift precision measurement, in particular to a high-precision intelligent frequency shift and phase shift measuring device and method.
Background
With the development of communication technology, the information traffic is explosively increasing, the channel capacity is becoming saturated, and the electromagnetic wave frequency channels are almost used up, thereby resulting in multiplexing of communication channels.
In multiplexing communication, it is necessary to strictly measure and control frequency shift and phase shift in order to perform more intensive multiplexing. At present, frequency shift and phase shift of various electronic components and networks thereof cannot be effectively monitored, development of a dense communication multiplexing mode is limited, and the method becomes a bottleneck restricting communication development. It is very necessary to develop a super-high precision frequency shift phase shift detection device. Therefore, how to realize the frequency shift and phase shift precision measurement of various electronic components and networks formed by various electronic components still remains to be solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-precision intelligent frequency shift and phase shift measuring device and method, which are used for realizing high-precision measurement of frequency attenuation of various electronic components and a dual-port network thereof, wherein the measurement precision, namely the relative change rate of the frequency can reach 10-20And the magnitude can also realize high-precision measurement of phase angle movement of various electronic components and dual-port networks thereof.
The technical scheme adopted by the invention is as follows:
a high-precision intelligent frequency shift and phase shift measuring device is used for accurately measuring the frequency shift and phase shift of a component and a dual-port network thereof and comprises a signal generating module, an amplifying and filtering module, a follower, a microprocessor, and input and output terminals connected with the component to be measured and the dual-port network thereof; the signal generation module is connected with the input end of the amplification and filtering module, the output end of the amplification and filtering module is connected with the input wiring end, the output wiring end is connected with the microprocessor, one end of the follower is connected with the input wiring end, the other end of the follower is connected with the output wiring end, the microprocessor is connected with the upper computer through a communication interface, and the microprocessor is further connected with a storage module, an input device and a display module.
Furthermore, the signal generation module is composed of an oscillator, an amplifier and an amplitude stabilizing ring, the oscillator is connected with the amplifier, and the output end of the amplifier is connected with the amplitude stabilizing ring.
Furthermore, the amplifying and filtering module is composed of an amplifying circuit and a low-pass filtering circuit, and the low-pass filtering circuit is connected with the output end of the amplifying circuit.
Further, the storage module comprises a ROM memory and a data memory.
Further, the microprocessor is provided with a high-speed analog-to-digital converter.
Further, the input device is a keyboard.
A high-precision intelligent frequency shift and phase shift measuring method is used for accurately measuring frequency shift and phase shift of components and dual-port networks thereof, and comprises the following steps:
step 1, generating an electromagnetic wave signal X1 by a signal generating module, wherein the electromagnetic wave signal X1 becomes a signal to be detected X2 through an amplifying and filtering module;
step 2, the signal X2 to be measured becomes a phase shift signal X3 through a component to be measured and a dual-port network thereof, and the phase shift signal X3 is corrected by using a follower; sending the phase shift signal X3 to a microprocessor to measure the phase angle, and displaying the measured phase angle on a display module;
and 3, solving according to the phase angle to obtain frequency shift and phase shift.
Further, in step 3, solving according to the phase angle to obtain the frequency shift specifically includes:
the calculation formula of the frequency shift is as follows:
where Δ f is the amount of frequency change, fiIs the input frequency, f, of the tested component and its dual-port networkoThe frequency of the tested component and the output end of the dual-port network thereof is obtained; Δ θ is the phase angle due to the accumulated frequency shift; t is a measurement time period;
the phase shift is calculated as:
wherein,is the amount of change in phase angle.
Compared with the prior art, the invention has the beneficial effects that:
the invention generates electromagnetic wave signal by signal generator, and the signal is amplified and filtered by the amplifying and filtering module, the frequency shift and phase shift of the tested component and its double-port network, the output terminal signal and the follower signal are sent to the microprocessor for processing, and then the measuring result is displayed, thereby realizing high-precision measurement of frequency attenuation of various electronic components and their double-port network, the measuring precision, namely the relative change rate of frequency can reach 10-20The magnitude can also realize high-precision measurement of phase angle movement of various electronic components and dual-port networks thereof; the follower is adopted to effectively eliminate the measurement error caused by the signals of the input terminal and the output terminal; frequency, amplitude and power modulation is realized through a keyboard; is finished by a communication interface and is connected with an upper computerAnd communication is realized, and the measured data is conveniently and quickly transmitted to a computer for processing and effective storage.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic diagram of an overall structure of a high-precision intelligent frequency shift and phase shift measuring device according to a first embodiment of the present invention;
fig. 2 is a flowchart of a high-precision intelligent frequency shift and phase shift measurement method according to a second embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
In order to implement high-precision measurement of frequency shift and phase shift of various electronic components and networks thereof, the embodiment provides a high-precision intelligent frequency shift and phase shift measuring device, which is used for accurately measuring frequency shift and phase shift of components and dual-port networks thereof, and as shown in fig. 1, the measuring device comprises a signal generating module, an amplifying and filtering module, a follower, a microprocessor, and input and output terminals connected with the components to be measured and the dual-port networks thereof; the signal generation module is connected with the input end of the amplification and filtering module, the signal generation module consists of an oscillator, an amplifier and an amplitude stabilizing ring, the oscillator is connected with the amplifier, and the output end of the amplifier is connected with the amplitude stabilizing ring; the output end of the amplifying and filtering module is connected with an input wiring end, the amplifying and filtering module consists of an amplifying circuit and a low-pass filtering circuit, the low-pass filtering circuit is connected with the output end of the amplifying circuit, the output wiring end is connected with a microprocessor, one end of the follower is connected with the input wiring end, the other end of the follower is connected with the output wiring end, the microprocessor is connected with an upper computer through a communication interface, and the microprocessor is further connected with a storage module, input equipment and a display module; the storage module comprises a ROM memory and a data memory; the microprocessor is provided with a high-speed analog-to-digital converter; the input device adopts a keyboard.
The embodiment disclosed by the invention takes a microprocessor as a control center for controlling the whole device, is provided with a ROM (read only memory) and a data memory, and realizes the modulation of frequency, amplitude and power by a keyboard; the device is also provided with a communication interface for completing the communication with an upper computer, realizing the convenient and fast transmission of the measured data to the computer for processing and effective storage, and displaying the measuring result through the display module. Because the frequency shift is very weak and the relative error is small, the change is difficult to measure by the conventional method, and the followers are added at the two ends of the component and the dual-port network thereof, so that the signal of the output terminal strictly follows the signal change of the input terminal, and the error generated by the signal source is eliminated.
According to the technical scheme, compared with the prior art, the embodiment of the invention discloses a high-precision intelligent frequency shift and phase shift measuring device, and during testing, a tested component and a double-port network thereof are connected with each otherBetween the input and output terminals, an electromagnetic wave signal is generated by a signal generator, and is transmitted to the input terminal of the tested component and the input terminal of the dual-port network through an amplifying and filtering module, and reaches the output terminal through the frequency shift and the phase shift of the tested component and the dual-port network, the follower follows the signals at two ends of the tested component and the dual-port network, so as to eliminate the measurement error caused by directly measuring the signals of the input terminal and the output terminal, the output terminal signal and the follower signal are sent to a microprocessor for processing, and then the measurement result is displayed, the measuring device realizes the high-precision measurement of the frequency attenuation of various electronic components and the dual-port network, and the measurement precision, namely the relative change rate of the frequency can reach-20And the magnitude can also realize high-precision measurement of phase angle movement of various electronic components and dual-port networks thereof.
Example two
As shown in fig. 2, the present embodiment provides a high-precision intelligent frequency shift and phase shift measuring method, which is used for accurately measuring frequency shift and phase shift of a component and a dual-port network thereof, and includes the following steps:
step 1, generating an electromagnetic wave signal X1 by a signal generating module, wherein the electromagnetic wave signal X1 becomes a signal to be detected X2 through an amplifying and filtering module;
step 2, the signal X2 to be measured becomes a phase shift signal X3 through a component to be measured and a dual-port network thereof, and the phase shift signal X3 is corrected by using a follower; sending the phase shift signal X3 to a microprocessor to measure the phase angle, and displaying the measured phase angle on a display module;
step 3, solving according to the phase angle to obtain frequency shift and phase shift, which specifically comprises the following steps:
the calculation formula of the frequency shift is as follows:
where Δ f is the amount of frequency change, fiIs the input frequency, f, of the tested component and its dual-port networkoThe frequency of the tested component and the output end of the dual-port network thereof is obtained; Δ θ is the phase angle due to the accumulated frequency shift; t is a measurement time period;
the phase shift is calculated as:
wherein,is the amount of change in phase angle.
In the embodiment disclosed by the invention, during testing, a tested component and a double-port network thereof are connected between the input terminal and the output terminal, an electromagnetic wave signal X1 is generated through the signal generating module, and the electromagnetic wave signal X1 is amplified and filtered by the amplifying and filtering module to become a signal X2 to be tested; the signal X2 to be measured becomes a phase shift signal X3 through the frequency shift and the phase shift of the tested component and the dual-port network thereof, and the phase shift signal X3 is corrected by using a follower to eliminate the measurement error; sending the phase shift signal X3 to a microprocessor to measure a phase angle, and displaying the measured phase angle on a display module to see the original variation; and solving according to the phase angle to obtain the frequency shift and the phase shift. The measuring method of the embodiment realizes high-precision measurement of frequency attenuation of various electronic components and dual-port networks thereof, and the measurement precision, namely the relative change rate of the frequency can reach 10-20And the magnitude can also realize high-precision measurement of phase angle movement of various electronic components and dual-port networks thereof.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A high-precision intelligent frequency shift and phase shift measuring device is used for accurately measuring the frequency shift and phase shift of components and double-port networks thereof and is characterized by comprising a signal generating module, an amplifying and filtering module, a follower, a microprocessor, and input and output terminals for connecting the components to be measured and the double-port networks thereof; the signal generation module is connected with the input end of the amplification and filtering module, the output end of the amplification and filtering module is connected with the input wiring end, the output wiring end is connected with the microprocessor, one end of the follower is connected with the input wiring end, the other end of the follower is connected with the output wiring end, the microprocessor is connected with the upper computer through a communication interface, and the microprocessor is further connected with a storage module, an input device and a display module.
2. A high precision intelligent frequency shift and phase shift measuring device as claimed in claim 1, wherein said signal generating module is composed of an oscillator, an amplifier and an amplitude stabilizing ring, said oscillator is connected with the amplifier, and the output end of said amplifier is connected with the amplitude stabilizing ring.
3. A high precision intelligent frequency shift and phase shift measuring device as claimed in claim 1, wherein said amplifying and filtering module is composed of an amplifying circuit and a low pass filter circuit, said low pass filter circuit is connected with the output end of the amplifying circuit.
4. A high precision intelligent frequency shift, phase shift measuring device as claimed in claim 1, wherein said memory module comprises ROM memory and data memory.
5. A high precision intelligent frequency shift, phase shift measuring device as claimed in claim 1, wherein said microprocessor is provided with a high speed analog to digital converter.
6. A high precision intelligent frequency shift, phase shift measuring device as claimed in claim 1, wherein said input device is a keyboard.
7. A high-precision intelligent frequency shift and phase shift measuring method is used for accurately measuring frequency shift and phase shift of components and dual-port networks thereof, and is characterized by comprising the following steps:
step 1, generating an electromagnetic wave signal X1 by a signal generating module, wherein the electromagnetic wave signal X1 becomes a signal to be detected X2 through an amplifying and filtering module;
step 2, the signal X2 to be measured becomes a phase shift signal X3 through a component to be measured and a dual-port network thereof, and the phase shift signal X3 is corrected by using a follower; sending the phase shift signal X3 to a microprocessor to measure the phase angle, and displaying the measured phase angle on a display module;
and 3, solving according to the phase angle to obtain frequency shift and phase shift.
8. The method as claimed in claim 7, wherein the step 3 of obtaining the frequency shift and the phase shift by solving according to the phase angle specifically comprises:
the calculation formula of the frequency shift is as follows:
where Δ f is the amount of frequency change, fiIs the input frequency, f, of the tested component and its dual-port networkoThe frequency of the tested component and the output end of the dual-port network thereof is obtained; Δ θ is the phase angle due to the accumulated frequency shift; t is a measurement time period;
the phase shift is calculated as:
wherein,is the amount of change in phase angle.
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Citations (8)
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| US3986113A (en) * | 1973-11-23 | 1976-10-12 | Hewlett-Packard Company | Two channel test instrument with active electronicphase shift means |
| US7231311B2 (en) * | 2005-04-19 | 2007-06-12 | Jan Verspecht | Method for characterizing high-frequency mixers |
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN202083742U (en) * | 2011-03-03 | 2011-12-21 | 赵孔新 | Digital excitation source and detection switching channel of ultra-low frequency wideband frequency characteristic analyzer |
| CN102445600A (en) * | 2010-09-30 | 2012-05-09 | 上海华建电力设备股份有限公司 | Optimization method based on traditional phase difference measurement and circuit |
| CN202710660U (en) * | 2012-08-23 | 2013-01-30 | 黑龙江工程学院 | SOPC-based frequency characteristic H(jomega) testing device |
| CN104535838A (en) * | 2015-01-21 | 2015-04-22 | 长沙理工大学 | Phase-frequency characteristic detector and method for detecting phase-frequency characteristic |
| CN104808056A (en) * | 2015-04-19 | 2015-07-29 | 华南理工大学 | Frequency characteristic testing method and device based on comparator conversion |
-
2017
- 2017-06-13 CN CN201710442824.8A patent/CN106997004A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986113A (en) * | 1973-11-23 | 1976-10-12 | Hewlett-Packard Company | Two channel test instrument with active electronicphase shift means |
| US7231311B2 (en) * | 2005-04-19 | 2007-06-12 | Jan Verspecht | Method for characterizing high-frequency mixers |
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN102445600A (en) * | 2010-09-30 | 2012-05-09 | 上海华建电力设备股份有限公司 | Optimization method based on traditional phase difference measurement and circuit |
| CN202083742U (en) * | 2011-03-03 | 2011-12-21 | 赵孔新 | Digital excitation source and detection switching channel of ultra-low frequency wideband frequency characteristic analyzer |
| CN202710660U (en) * | 2012-08-23 | 2013-01-30 | 黑龙江工程学院 | SOPC-based frequency characteristic H(jomega) testing device |
| CN104535838A (en) * | 2015-01-21 | 2015-04-22 | 长沙理工大学 | Phase-frequency characteristic detector and method for detecting phase-frequency characteristic |
| CN104808056A (en) * | 2015-04-19 | 2015-07-29 | 华南理工大学 | Frequency characteristic testing method and device based on comparator conversion |
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