CN106680584A - All-digital portable spectrum analysis system - Google Patents
All-digital portable spectrum analysis system Download PDFInfo
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- CN106680584A CN106680584A CN201610997293.4A CN201610997293A CN106680584A CN 106680584 A CN106680584 A CN 106680584A CN 201610997293 A CN201610997293 A CN 201610997293A CN 106680584 A CN106680584 A CN 106680584A
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- frequency
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- amplitude
- dsp controller
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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
- G01R23/16—Spectrum analysis; Fourier analysis
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- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
An all-digital portable spectrum analysis system relates to all-digital portable spectrum analysis equipment. The problem that the existing frequency characteristic test equipment is big and heavy and cannot test digital equipment directly is solved. An all-digital spectrum analyzer is adopted to realize communication with to-be-tested equipment and a computer. The all-digital spectrum analyzer analyzes the phase frequency and amplitude frequency characteristics of the to-be-tested equipment. A DSP controller designs the frequency sweep step size according to the frequency test range and the total number of frequency points of the to-be-tested equipment, sends a frequency sweep instruction to the to-be-tested equipment via an RS422 bus or a CAN bus, and receives feedback signals from the to-be-tested equipment. The DSP controller filters the feedback signals under all frequency points in the frequency test range, obtains the amplitude frequency characteristic of the input frequency according to the ratio of the feedback amplitude value to the input peak value, sends a frequency sweep instruction and unprocessed signals fed back by the to-be-tested equipment to the computer in real time, and displays processed phase frequency and amplitude frequency characteristic curves. The system of the invention has the advantages of small size, low weight, easy maintenance, and stable performance.
Description
Technical field
The present invention relates to a kind of digital portable frequency spectrum analysis system.
Background technology
Frequency characteristic is an important indicator of electronic device, circuit system or electrical equipment, the test of its frequency characteristic
Analysis, maintenance, improvement to circuit system or electrical equipment etc. have great importance.
Frequency characteristic test equipment traditional at present realizes that its volume is big, equipment is heavy, operation using discrete component mostly
It is complicated, expensive.Meanwhile, traditional frequency characteristic test equipment input is mostly analogue signal with output, gives digitized electricity
The calibration tape of sub- product carrys out inconvenience, and cannot be with computer interface, and its test data cannot be preserved directly, give user band
Carry out inconvenience.
In recent years, developing rapidly, popularizing with electronic technology such as DSP, single-chip microcomputers, greatly promoted the numeral of electronic product
Change, intellectuality, traditional rate characteristic testing equipment cannot meet the testing requirement of scientific research personnel.For this reason, it may be necessary to design one
Kind of small volume, it is lightweight, be easy to carry, and the equipment that direct measurement analysis can be carried out to the frequency characteristic of digital device, while
Data process＆analysis can be easy to compunication.
The content of the invention
The present invention for the frequency characteristic test equipment volume that solves existing spectrum analyses equipment it is big, heavy, cannot directly survey
A kind of problem of examination digital device, there is provided digital portable frequency spectrum analysis system.
Digital portable frequency spectrum analysis system, using dsp controller as main control chip, the phase frequency and width of device under test
Frequency characteristic is analyzed；Comprise the following steps that：
Dsp controller designs sweeping steps according to the frequency test scope and Frequency point sum of Devices to test, and passes through
RS422 buses or CAN send frequency sweep and instruct to Devices to test；Then to be measured setting is received by RS422 buses or CAN
Standby feedback signal；Frequency sweep is instructed the dsp controller and feedback signal is processed, to each in the range of frequency test
Feedback signal under Frequency point is filtered process, and using zero passage method phase frequency is calculated；And according to feedback magnitude and input peak-to-peak value
Ratio, obtain incoming frequency amplitude-frequency characteristic, and by RS422 buses or CAN in real time to computer send frequency sweep instruction
And the untreated signal of Devices to test feedback, while the phase frequency and amplitude-frequency after the process of Computer display dsp controller is special
Linearity curve.
Beneficial effects of the present invention：
1st, system bulk of the present invention is little, lightweight, is convenient for carrying, while easy to maintain, stable performance, reliability
Height, is that environmental test and field trial provide facility；Using TMS320F28335 as main control chip, control accuracy is high；
2nd, the present invention takes Frequency point according to swept frequency range using logarithmic coordinates system unique step, exports after dsp controller process
Data can directly draw width phase frequency bode figure；
3rd, the system is to improve the versatility of this equipment, and this equipment adopts two kinds of communication protocols of RS422 and CAN, can basis
The communication protocol of Devices to test, adjusts toggle switch and is modified；
4th, the system is by CANoe on line real-time monitoring test processs, and preserves initial data and process by computer
Data afterwards, facilitate customer analysis to use；
Description of the drawings
Fig. 1 is the theory diagram of the digital portable frequency spectrum analysis system of the present invention.
Specific embodiment
Specific embodiment one, present embodiment is illustrated with reference to Fig. 1, based on the digital portable of RS422 and CAN
Spectrum analyzer system, using dsp controller as main control chip, the amplitude-frequency and phase-frequency characteristic of device under test are analyzed；Using
Two kinds of communication patterns of RS422 buses and CAN that it is carried, realize the communication with Devices to test and computer.
Comprise the following steps that：Dsp controller arranges frequency test scope f~f and Frequency point sum m, designs sweeping steps
For 10(i∈[2,m-1])；Frequency point is taken using logarithmic coordinates system unique step, frequency sweep instruction by RS422 buses or
CAN mode is sent to Devices to test, and receives the feedback signal of Devices to test by RS422 buses or CAN；
Frequency sweep is instructed the dsp controller and feedback signal is processed, and the feedback signal under each Frequency point is entered
After row Filtering Processing, and phase frequency is calculated using zero passage method, feedback magnitude is respectively Y with input peak-to-peak valueωi,Xωi, then in input frequency
Amplitude-frequency characteristic under rate ω iCommunicated with computer by RS422 buses or CAN；In real time to calculating
Machine sends the raw information of test instruction and Devices to test feedback, at the same phase frequency after computer display display processing and
Amplitude-versus-frequency curve；Test can according to demand preserve initial data and amplitude-frequency and phase-frequency characteristic data after process after terminating.
Dsp controller described in present embodiment is TMS320F28335 chips, and using toggle switch dsp controller is selected
With the logical mode of Devices to test, i.e.,：By RS422 buses or CAN and Devices to test and compunication.
In present embodiment, due to instructing amplitude and frequency, it is known that event is when amplitude-versus-frequency curve is drawn, it is only necessary to know
Feedback signal amplitude.For convenience of calculating, array a [] is set up, the feedback signal peak point under Frequency point ω i is stored in into number
Group a [], and its absolute value is filtered, array Y [i] is write after being averaging, and array a [] is emptied, it is next Frequency point
ω(i+1)Data write prepare.Simultaneously set up array b [], by frequencies omega i give an order signal zero-crossing when feedback signal
Phase place is stored in array b [], and its absolute value is filtered, and array W [i] is write after being averaging, and empties array b [].Obtain
After amplitude and phase place under frequencies omega i, calculate Amplitude Ration, and by amplitude and phase place by RS422 buses or CAN send to
Computer, by matlab or other mapping softwares, is obtained the amplitude-frequency and phase-frequency characteristic curve of Devices to test.
Meanwhile, present embodiment sends test instruction to computer in real time by RS422 buses or CAN and equipment is anti-
The raw information and width phase frequency information of feedback, can in real time show on a computer display tracking by USBcan or CANoe equipment
Curve and phase frequency and amplitude-versus-frequency curve.Amplitude-frequency phase frequency test can according to demand preserve initial data and process after terminating after is special
Property data, are that research worker carries out product design, failture evacuation etc. and provides convenience.
Claims (3)
1. digital portable frequency spectrum analysis system, is realized logical with computer with Devices to test using digital spectrum analyzer
Letter；It is characterized in that, using dsp controller as main control chip, the phase frequency and amplitude-frequency characteristic of device under test are analyzed；
Comprise the following steps that：
Dsp controller designs sweeping steps according to the frequency test scope and Frequency point sum of Devices to test, and by RS422
Bus or CAN send frequency sweep and instruct to Devices to test；Then Devices to test is received by RS422 buses or CAN
Feedback signal；
Frequency sweep is instructed the dsp controller and feedback signal is processed, under each Frequency point in the range of frequency test
Feedback signal be filtered process, using zero passage method calculate phase frequency；And according to feedback magnitude and the ratio of input peak-to-peak value, obtain
The amplitude-frequency characteristic of incoming frequency, and frequency sweep instruction and Devices to test are sent to computer by RS422 buses or CAN in real time
The untreated signal of feedback, while the phase frequency and amplitude-versus-frequency curve after the process of Computer display dsp controller.
2. digital portable frequency spectrum analysis system according to claim 1, it is characterised in that also including toggle switch,
The communication of dsp controller and Devices to test is selected by toggle switch.
3. digital portable frequency spectrum analysis system according to claim 1, it is characterised in that the dsp controller is adopted
With TMS320F28335 as main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610997293.4A CN106680584A (en) | 2016-11-11 | 2016-11-11 | All-digital portable spectrum analysis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610997293.4A CN106680584A (en) | 2016-11-11 | 2016-11-11 | All-digital portable spectrum analysis system |
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| CN106680584A true CN106680584A (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610997293.4A Pending CN106680584A (en) | 2016-11-11 | 2016-11-11 | All-digital portable spectrum analysis system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989149A (en) * | 2018-07-19 | 2018-12-11 | 北京智网信测科技有限公司 | Fast testing system based on radio detection |
| CN109472846A (en) * | 2018-12-27 | 2019-03-15 | 燕山大学 | The method for obtaining Bode diagram with MATLAB processing frequency sweep data |
| CN110174552A (en) * | 2019-05-31 | 2019-08-27 | 昆明理工大学 | A kind of digital double channel frequency response analyzer and test method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806833A (en) * | 2010-03-08 | 2010-08-18 | 中国航空工业集团公司西安飞机设计研究所 | Multi-channel frequency response analysis system and method thereof |
| CN201607486U (en) * | 2010-02-24 | 2010-10-13 | 陈晓明 | Digital frequency characteristic tester |
| CN104808056A (en) * | 2015-04-19 | 2015-07-29 | 华南理工大学 | Frequency characteristic testing method and device based on comparator conversion |
| CN105842566A (en) * | 2016-05-19 | 2016-08-10 | 中国第汽车股份有限公司 | Automatic digital filter amplitude frequency characteristic curve mapping system and mapping method thereof |
| CN205506977U (en) * | 2016-04-13 | 2016-08-24 | 河北工业大学 | Digit frequency characteristic testing arrangement based on single chip microcomputer control |
-
2016
- 2016-11-11 CN CN201610997293.4A patent/CN106680584A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607486U (en) * | 2010-02-24 | 2010-10-13 | 陈晓明 | Digital frequency characteristic tester |
| CN101806833A (en) * | 2010-03-08 | 2010-08-18 | 中国航空工业集团公司西安飞机设计研究所 | Multi-channel frequency response analysis system and method thereof |
| CN104808056A (en) * | 2015-04-19 | 2015-07-29 | 华南理工大学 | Frequency characteristic testing method and device based on comparator conversion |
| CN205506977U (en) * | 2016-04-13 | 2016-08-24 | 河北工业大学 | Digit frequency characteristic testing arrangement based on single chip microcomputer control |
| CN105842566A (en) * | 2016-05-19 | 2016-08-10 | 中国第汽车股份有限公司 | Automatic digital filter amplitude frequency characteristic curve mapping system and mapping method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 周满 等: "导弹数字舵机多通道信号转换及传输***设计", 《计算机测量与控制》 * |
| 孙雪君 等: "数字合成扫频仪USB2.0接口设计", 《电子科技》 * |
| 林伟民 等: "基于TMS320F2812 DSP的音频数字扫频仪研制", 《信息化研究》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989149A (en) * | 2018-07-19 | 2018-12-11 | 北京智网信测科技有限公司 | Fast testing system based on radio detection |
| CN109472846A (en) * | 2018-12-27 | 2019-03-15 | 燕山大学 | The method for obtaining Bode diagram with MATLAB processing frequency sweep data |
| CN109472846B (en) * | 2018-12-27 | 2022-11-29 | 燕山大学 | Method for obtaining bode diagram by processing sweep frequency data by MATLAB |
| CN110174552A (en) * | 2019-05-31 | 2019-08-27 | 昆明理工大学 | A kind of digital double channel frequency response analyzer and test method |
| CN110174552B (en) * | 2019-05-31 | 2023-12-22 | 昆明理工大学 | Digital dual-channel frequency response analyzer and testing method |
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Application publication date: 20170517 |