CN201749153U - Convenient multifunctional harmonic analyzer with GPS time-service locating function - Google Patents
Convenient multifunctional harmonic analyzer with GPS time-service locating function Download PDFInfo
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- CN201749153U CN201749153U CN2010202909603U CN201020290960U CN201749153U CN 201749153 U CN201749153 U CN 201749153U CN 2010202909603 U CN2010202909603 U CN 2010202909603U CN 201020290960 U CN201020290960 U CN 201020290960U CN 201749153 U CN201749153 U CN 201749153U
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- 238000004458 analytical method Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- LIWAQLJGPBVORC-UHFFFAOYSA-N ethylmethylamine Chemical compound CCNC LIWAQLJGPBVORC-UHFFFAOYSA-N 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a convenient multifunctional harmonic analyzer with GPS time-service locating function which aims at solving the problems of incorrect clock and being incapable of accurate locating of the current harmonic analyzer. The convenient multifunctional harmonic analyzer with GPS time-service locating function includes a measuring signal processing module, a DSP module, an ARM module, a remote communication module, a data storage, a LCD drive and display device, a keyboard and a power module. The convenient multifunctional harmonic analyzer with GPS time-service locating function is characterized by also including a GPS module; the GPS receives a satellite signal; the 3D position information of a point to be detected including longitude, latitude, elevation and international standard time are obtained from the GPS module; and the actual position of the measuring point at the time is provided to the ARM module by a time-service channel. The convenient multifunctional harmonic analyzer with GPS time-service locating function adopts the GPS module to determine the time and the position of the measuring point, which effectively solves the problems of incorrect clock and being incapable of accurate locating of the current harmonic analyzer.
Description
Technical field
The utility model relates to the electric variable measurement device, particularly a kind of portable multi-function harmonic analysis instrument with GPS time service positioning function.
Background technology
Along with the expansion of development of electric power industry and electrical network scale, quality of power supply measurement point position disperses, and the time is difficult to unified, is not easy to the fault analysis after to Operation of Electric Systems monitoring and accident of power plant, power station.At present, the inner clock that self provides is provided for general frequency analysis instrument or equipment, and the difference owing to each clock product quality causes having certain deviation on the time precision, and the actual geographic position of measurement point is difficult to accurately determine.
Summary of the invention
For solving existing harmonic analysis instrument inaccurate clock and can't pinpoint problem, the utility model proposes a kind of portable multi-function harmonic analysis instrument of the GPS of having time service positioning function.
A kind of portable multi-function harmonic analysis instrument with GPS time service positioning function, it comprises measuring-signal processing module, DSP module, ARM module, remote communication module, data storage, LCD driving and display device, keyboard, power module, it is characterized in that also comprising the GPS module, GPS module receiving satellite signal, obtain the tested point three dimensional local information from the GPS module: longitude, latitude, height above sea level and universal time provide the physical location of this moment measurement point to the ARM module by the time service passage.
The utility model adopts the GPS module to determine the time and the position of measurement point, has solved existing harmonic analysis instrument inaccurate clock and can't pinpoint problem effectively.
Description of drawings
Fig. 1 is the utility model composition frame chart
Fig. 2 is the utility model GPS time service location block diagram
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
A kind of portable multi-function harmonic analysis instrument with GPS time service positioning function, as shown in Figure 1, it comprises measuring-signal processing module, DSP module, ARM module, remote communication module, data storage, LCD driving and display device, keyboard, power module, it is characterized in that also comprising the GPS module.Input signal is connected to the DSP module by the measuring-signal processing module and carries out computing, and the measurement point geographic position is obtained by the GPS module, is driven with display device by LCD and demonstrates parameters of electric power and geographic position.
The utility model adopts DSP module+ARM Module Design framework, digital signal processor (DSP) TMS320F2812 of TI is adopted in front-end collection and processing, the sampling and the arithmetic speed of front end have been guaranteed, what the rear end man-machine interface partly adopted is high performance chip arm processor, software adopts the embedded OS (WINCE) based on multitask, stable performance, real-time.
Adopt high-accuracy voltage/current transformer to carry out Signal Spacing and conversion.Front-end sampling partly adopts 16 high-precision high-speed analog to digital converter AD73360, and its inside has 6 autonomous channels, three voltages, three current data that are used to sample, and has guaranteed the precision and the speed of real-time sampling.
Harmonics Calculation: the method for utilizing frequency-domain analysis, the digital signal that DSP obtains after front-end A/D is changed is handled, use fast fourier algorithm (FFT), can measure subharmonic voltage, gradation voltage harmonic content and the total voltage harmonic content of three-phase voltage U A, UB, UC; Can also measure subharmonic electric current, gradation current harmonic content and the total current harmonic content of three-phase current IA, IB, IC.
At first the electric current and voltage input signal is carried out data sampling and the filtering of RC filter network, carry out the A/D conversion then.A/D converts the back and produces interruption, reads the result of each conversion in interrupt service subroutine, as the input of digital low-pass filtering.The input of DSP is the digital signal that obtains after the A/D conversion, and DSP handles the digital signal of input, and passes through certain calculating and be converted to corresponding energy.
Harmonic measure adopts frequency domain analysis, by 1280 points in 16 cycles of sampling, gets wherein 1024 conducts and calculates sample, and each cycle is adopted 1/5 cycle of phase shift, adopts the phase difference correction method to calculate harmonic component then.Because sequence length is bigger, adopt Fast Fourier Transform (FFT) (FFT), by the application of FFT in DSP, calculate the N order harmonic components.
The utility model time service Positioning Principle block diagram as shown in Figure 2.Harmonic analysis instrument carries out the clock time service and the measurement point location process is: GPS module receiving satellite signal, obtain the tested point three dimensional local information from the GPS module: longitude, latitude, height above sea level and universal time provide the physical location of this moment measurement point to the ARM module by time service passage (RS232).
The data communication of GPS module adopts serial ports to communicate, and the defeated outward data layout of serial uses the NMEA183 standard of American National ocean Institution of Electronics (NMEA), and the GPS module is outwards sent a PPS pulse per second (PPS) and information such as a string location, clock p.s..
GPS module model is BR-355, uses SiRF Star III chipset to add that built-in active ceramic antenna makes that the location is more accurate; The receiver high sensitivity (even-159dBm) make that the location is still very quick for the first time under the faint situation of satellite signals.Super large capacitor is set in the receiver, can stores the satellite signals data that obtain fast.The programming of GPS module is described below: initialization module is realized making zero to serial initialization and all mark positions; Control module is to carry out corresponding operation according to the order of host computer, such as gathering gps data, sends current state etc.; Data acquisition module obtain current GPS information by the GPS module that is connected with serial ports exactly; What use in program is the GPRMC locate statement, will ignore out of Memory.The method of extracting the GPRMC statement is that a data buffer zone is set, the gps data that receives is all put into this buffer zone, when having expired, buffer zone just in buffer zone, searches whether receive the GPRMC locate statement, if do not receive then receive gps data again.If found the GPRMC locate statement also to judge the position of this statement in buffer zone from the maximum number of byte of buffer zone whether greater than 62 bytes.Subscriber interface module shows gps data, status data etc. exactly on touch-screen, also want to respond the interruption on the touch-screen simultaneously, so that realize the function by touch screen operation.
ARM of the present utility model adopts the S3C2440B microprocessor, and this processor is a high-performance, low-power consumption, the high integration microprocessor of being released by Samsung semiconductor company.Cooperate 5.6 inches liquid crystal displays, WINCE5.0 operating system.Touch-screen can intuitively, vivo show operational factor and running status, and can directly revise system operational parameters by the touch-screen picture, and man-machine interaction is good.
Touch-screen and DSP adopt serial communication, Modbus agreement.The Modbus agreement is that U.S. Modicon company releases, between a kind of effective support controller and controller via the agreement that communicates between network (as Ethernet) and other equipment.
Power supply is selected 2400mAH7.2V high power capacity chargeable lithium cell for use.
The interface of ARM and computing machine has 2, and the one, the usb data interface, one is the RS485 interface.
Claims (1)
1. portable multi-function harmonic analysis instrument with GPS time service positioning function, it comprises measuring-signal processing module, DSP module, ARM module, remote communication module, data storage, LCD driving and display device, keyboard, power module, it is characterized in that also comprising the GPS module, GPS module receiving satellite signal, obtain the tested point three dimensional local information from the GPS module: longitude, latitude, height above sea level and universal time provide the physical location of this moment measurement point to the ARM module by the time service passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202909603U CN201749153U (en) | 2010-08-06 | 2010-08-06 | Convenient multifunctional harmonic analyzer with GPS time-service locating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202909603U CN201749153U (en) | 2010-08-06 | 2010-08-06 | Convenient multifunctional harmonic analyzer with GPS time-service locating function |
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| Publication Number | Publication Date |
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| CN201749153U true CN201749153U (en) | 2011-02-16 |
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| CN2010202909603U Expired - Fee Related CN201749153U (en) | 2010-08-06 | 2010-08-06 | Convenient multifunctional harmonic analyzer with GPS time-service locating function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305889A (en) * | 2011-07-18 | 2012-01-04 | 山东大学 | Dual mode 220v user side power grid phasor measuring and transmitting device and method |
| CN103926593A (en) * | 2014-04-25 | 2014-07-16 | 株洲时代日望信息科技有限公司 | Big Dipper positioning and communication integrated terminal based on locomotive security |
-
2010
- 2010-08-06 CN CN2010202909603U patent/CN201749153U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305889A (en) * | 2011-07-18 | 2012-01-04 | 山东大学 | Dual mode 220v user side power grid phasor measuring and transmitting device and method |
| CN103926593A (en) * | 2014-04-25 | 2014-07-16 | 株洲时代日望信息科技有限公司 | Big Dipper positioning and communication integrated terminal based on locomotive security |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20120806 |