CN105445674A - AC/DC power supply fault analyzing device and detection method thereof - Google Patents
AC/DC power supply fault analyzing device and detection method thereof Download PDFInfo
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- CN105445674A CN105445674A CN201510937844.3A CN201510937844A CN105445674A CN 105445674 A CN105445674 A CN 105445674A CN 201510937844 A CN201510937844 A CN 201510937844A CN 105445674 A CN105445674 A CN 105445674A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses an AC/DC power supply fault analyzing device and a detection method thereof. The analyzing device is provided with a MCU, a power supply module, a 128 doubling circuit, an analog-digital converter, a clock circuit, a button, an external data storage device, an LCD display, an audible and visual alarm, a state indication lamp, a low pass frequency-selecting filter, a voltage transformer, and an operational amplifier circuit. The detection method is characterized in that 1) whether the electric signals are normal can be determined by comparing the voltage with the standard voltage reference value; when the electric signals are abnormal, the alarms can be given; when the electric signals are normal, then the step 2 can be carried out; 2) the 128 doubling pulse signals synchronized with the electric signals can be generated, and the converter can be used for the interval sampling of the electric signals;3) the preprocessing of the data acquisition result can be carried out, and the FFT conversion subprogram can be invoked for the FFT conversion of the data, and then the above mentioned process can be circulated 8times; 4) the extreme value after the FFT conversion can be eliminated by the digital filtering, and then the average value can be acquired, and then the content and the distortion coefficient of the subharmonics can be calculated; 5) whether the electric signals are normal can be determined by comparing the acquired value with the standard reference value, and when the distortion coefficient is too large, the alarms can be given and displayed.
Description
Technical field
The present invention relates to fault analysis instrument, especially relate to a kind of power of alterating and direct current fault analysis instrument and detection method thereof.
Background technology
The electric power system of instrument and meter, communication facilities, watch-dog is generally made up of links such as civil power, alternating current steady voltage plug, on line type UPS power supply, direct-current switch power supplies.If had, electric power system is unstable, fluctuation is large, and the harmonic content of power supply is too high, and ripple factor is excessive, when overvoltage, the abnormal conditions such as under-voltage occur, and will the stability of influential system and reliability.
Along with increasing of industrial development and residential electricity consumption equipment, Harmfulness Caused by Harmonics is day by day serious, and main manifestations is that harmonic wave makes equipment produce added losses, reduces the efficiency of consumer; Superpotential or excess current also may be caused to make capacitor, cable overheated with time-harmonic wave, insulation ag(e)ing, the lost of life, easy breaking out of fire.Power supply produces the main cause of harmonic wave, and one is generally adopt capacitor filtering type bridge rectifier circuit in Switching Power Supply, causes input current waveform to distort; Two is that switching device (diode, triode) in power circuit and inductive load work in HF switch state and produce spike.
Summary of the invention
The object of the invention is to for the above-mentioned problems in the prior art, provide a kind of and solve a kind of power of alterating and direct current fault analysis instrument judging that whether power fail is abnormal.
Another object of the present invention is to the detection method that a kind of power of alterating and direct current fault is provided.
Described power of alterating and direct current fault analysis instrument is provided with MCU, power module, 128 frequency multiplier circuits, analog to digital converter, clock circuit, button, external data memory, LCD display, audible-visual annunciator, status indicator lamp, low pass frequency-selecting filter, voltage transformer (VT), discharge circuit;
Described MCU is connected with power module, analog to digital converter, clock circuit, button, external data memory; Discharge circuit is connected with low pass frequency-selecting filter; Analog to digital converter is connected with 128 frequency multiplier circuits, low pass frequency-selecting filter; Voltage transformer (VT) is connected with discharge circuit; Described MCU is connected with LCD display, audible-visual annunciator, status indicator lamp; Described voltage transformer (VT) external AC power supply; Described discharge circuit external direct current power supply.
The present invention can carry out Real-time measuring and analyzing to the operation conditions of AC power or direct supply respectively, and when finding failure condition, power fail analyser can be reported to the police by acoustooptic, and shows the classification of fault.
The detection method of described power of alterating and direct current fault, comprises the following steps:
Step 1, compares with normal voltage reference value, judges that whether the magnitude of voltage of electric signal is normal; If abnormal, then directly send failure alarm signal, display overvoltage or under-voltage status indicator lamp; If normal, then enter step 2;
Step 2, produces the 128 double frequency pulse signals being synchronized with electric signal, controls analog to digital converter and carries out equal interval sampling 128 times to electric signal;
Step 3, carries out pre-service to data acquisition results, and then call FFT varitron program and carry out FFT conversion to data, said process circulates altogether and carries out 8 times;
Step 4, by digital filtering, the maximum value after removal step 3FFT conversion and minimal value, then average, then calculate content and the distortion factor of each harmonic;
Step 5, contrasts with the standard reference value under nominal situation, judges that whether electric signal is normal, if electric signal distortion factor is excessive, exceedes setting value, then send corresponding power fail sound and light alarm signal, and display power supply malfunction pilot lamp.
Outstanding technique effect of the present invention is as follows:
1, power fail analyser to direct supply or AC power all applicable.
2, content and the signal distortion coefficient of each harmonic in the voltage signals such as civil power, stabilized voltage supply, ups power, Switching Power Supply can be detected.
3, to abnormal conditions, the classification of fault can be shown and send sound and light alarm.
Accompanying drawing explanation
Fig. 1 is the structure composition frame chart of power of alterating and direct current fault analysis instrument embodiment of the present invention.
Fig. 2 is the detection method FB(flow block) of power of alterating and direct current fault of the present invention.
Embodiment
Following examples will elaborate to the present invention by reference to the accompanying drawings:
As shown in Figure 1, power of alterating and direct current fault analysis instrument embodiment of the present invention is provided with MCU1, power module 2,128 frequency multiplier circuit 3, analog to digital converter 4, clock circuit 5, button 6, external data memory 7, LCD display 8, audible-visual annunciator 9, status indicator lamp 10, low pass frequency-selecting filter 11, voltage transformer (VT) 12, discharge circuit 13;
Described MCU1 is connected with power module 2, analog to digital converter 4, clock circuit 5, button 6, external data memory 7; Discharge circuit 13 is connected with low pass frequency-selecting filter 11; Analog to digital converter 4 is connected with 128 frequency multiplier circuits 3, low pass frequency-selecting filter 11; Voltage transformer (VT) 12 is connected with discharge circuit 13; Described MCU1 is connected with LCD display 8, audible-visual annunciator 9, status indicator lamp 10; Described voltage transformer (VT) 12 external AC power supply 14; Described discharge circuit 13 external direct current power supply 15.
The present invention can carry out Real-time measuring and analyzing to the operation conditions of power of alterating and direct current, and when finding failure condition, power fail analyser can be reported to the police by acoustooptic, and shows the classification of fault.As shown in Figure 2, the detection method of power of alterating and direct current fault comprises the steps:
Step 1, compares with normal voltage reference value, judges that whether the magnitude of voltage of electric signal is normal; If abnormal, then directly send failure alarm signal, display overvoltage or under-voltage status indicator lamp; If normal, then enter step 2;
Step 2, produces the 128 double frequency pulse signals being synchronized with electric signal, controls analog to digital converter and carries out equal interval sampling 128 times to electric signal;
Step 3, carries out pre-service to data acquisition results, and then call FFT varitron program and carry out FFT conversion to data, said process circulates altogether and carries out 8 times;
Step 4, by digital filtering, the maximum value after removal step 3FFT conversion and minimal value, then average, then calculate content and the distortion factor of each harmonic;
Step 5, contrasts with the standard reference value under nominal situation, judges that whether electric signal is normal, if electric signal distortion factor is excessive, exceedes setting value, then send corresponding power fail sound and light alarm signal, and display power supply malfunction pilot lamp.
Claims (2)
1. power of alterating and direct current fault analysis instrument, is characterized in that being provided with MCU, power module, 128 frequency multiplier circuits, analog to digital converter, clock circuit, button, external data memory, LCD display, audible-visual annunciator, status indicator lamp, low pass frequency-selecting filter, voltage transformer (VT), discharge circuit;
Described MCU is connected with power module, analog to digital converter, clock circuit, button, external data memory; Discharge circuit is connected with low pass frequency-selecting filter; Analog to digital converter is connected with 128 frequency multiplier circuits, low pass frequency-selecting filter; Voltage transformer (VT) is connected with discharge circuit; Described MCU is connected with LCD display, audible-visual annunciator, status indicator lamp; Described voltage transformer (VT) external AC power supply; Described discharge circuit external direct current power supply.
2. the detection method of power of alterating and direct current fault, is characterized in that comprising the following steps:
Step 1, compares with normal voltage reference value, judges that whether the magnitude of voltage of electric signal is normal; If abnormal, then directly send failure alarm signal, display overvoltage or under-voltage status indicator lamp; If normal, then enter step 2;
Step 2, produces the 128 double frequency pulse signals being synchronized with electric signal, controls analog to digital converter and carries out equal interval sampling 128 times to electric signal;
Step 3, carries out pre-service to data acquisition results, and then call FFT varitron program and carry out FFT conversion to data, said process circulates altogether and carries out 8 times;
Step 4, by digital filtering, the maximum value after removal step 3FFT conversion and minimal value, then average, then calculate content and the distortion factor of each harmonic;
Step 5, contrasts with the standard reference value under nominal situation, judges that whether electric signal is normal, if electric signal distortion factor is excessive, exceedes setting value, then send corresponding power fail sound and light alarm signal, and display power supply malfunction pilot lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937844.3A CN105445674A (en) | 2015-12-16 | 2015-12-16 | AC/DC power supply fault analyzing device and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510937844.3A CN105445674A (en) | 2015-12-16 | 2015-12-16 | AC/DC power supply fault analyzing device and detection method thereof |
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| CN105445674A true CN105445674A (en) | 2016-03-30 |
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| CN201510937844.3A Pending CN105445674A (en) | 2015-12-16 | 2015-12-16 | AC/DC power supply fault analyzing device and detection method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787966A (en) * | 2017-01-11 | 2017-05-31 | 广东亦能地坪设备有限公司 | Machine for laying floor apparatus for monitoring power supply |
| CN108255658A (en) * | 2016-12-28 | 2018-07-06 | 天津正初科技有限公司 | A kind of light current intelligent monitoring early warning system for computer |
| CN108459279A (en) * | 2017-12-04 | 2018-08-28 | 山东超越数控电子股份有限公司 | A kind of power supply debugging apparatus and method based on FPGA |
| CN113879542A (en) * | 2021-10-26 | 2022-01-04 | 成都富凯飞机工程服务有限公司 | UI indicating system for airborne oxygen generator |
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| CN205193247U (en) * | 2015-12-16 | 2016-04-27 | 厦门大学 | AC/DC power supply failure analysis appearance |
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| CN201535935U (en) * | 2009-10-10 | 2010-07-28 | 佛山市柏克电力设备有限公司 | UPS voice alarm circuit |
| CN202189134U (en) * | 2011-07-08 | 2012-04-11 | 黄冬来 | Power failure monitoring device |
| CN205193247U (en) * | 2015-12-16 | 2016-04-27 | 厦门大学 | AC/DC power supply failure analysis appearance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255658A (en) * | 2016-12-28 | 2018-07-06 | 天津正初科技有限公司 | A kind of light current intelligent monitoring early warning system for computer |
| CN106787966A (en) * | 2017-01-11 | 2017-05-31 | 广东亦能地坪设备有限公司 | Machine for laying floor apparatus for monitoring power supply |
| CN108459279A (en) * | 2017-12-04 | 2018-08-28 | 山东超越数控电子股份有限公司 | A kind of power supply debugging apparatus and method based on FPGA |
| CN113879542A (en) * | 2021-10-26 | 2022-01-04 | 成都富凯飞机工程服务有限公司 | UI indicating system for airborne oxygen generator |
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