CN104991127B - With respect to dielectric loss and capacitance tester - Google Patents
With respect to dielectric loss and capacitance tester Download PDFInfo
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- CN104991127B CN104991127B CN201510442774.4A CN201510442774A CN104991127B CN 104991127 B CN104991127 B CN 104991127B CN 201510442774 A CN201510442774 A CN 201510442774A CN 104991127 B CN104991127 B CN 104991127B
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- 238000004891 communication Methods 0.000 claims abstract description 76
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 230000011664 signaling Effects 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 15
- 229910052744 lithium Inorganic materials 0.000 claims description 15
- 230000003750 conditioning effect Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000003993 interaction Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 14
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011000 absolute method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229960001296 zinc oxide Drugs 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000007651 thermal printing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of relative dielectric loss and capacitance tester, including carrying case and the circuit arrangement in portable box body；Circuit arrangement includes guidance panel, battery power management unit, wireless communication unit, measuring unit and display control unit；Display control unit electrically connects with wireless communication unit and measuring unit two-way signaling respectively；Power supply is provided during battery power management unit use；Measuring unit is responsible for PT secondary sides voltage, the collection of end shield leakage current data and Digital Signal Processing under the control of display control unit during work；For display control unit by keyboard finishing man-machine interaction, control measuring unit starts the measurement data progress real-time display for measuring and reading in real time measuring unit, storage, printout；Data are uploaded to supporting host computer implementation synchronization monitoring by display control unit in real time by wireless communication unit when needing.The present invention is compact-sized, when being easy to carry, using it is full-featured, measuring accuracy is high and easy to operate.
Description
Technical field
The present invention relates to power system testing tool technical field, and in particular to a kind of to be used for the capacitive in electric power system
The relative dielectric loss and capacitance tester that the relative medium loss factor and capacitance ratio of equipment measure.
Background technology
The capacitive apparatus such as capacitive current transformer, capacitance type potential transformer, coupled capacitor device, capacitance sleeve pipe and
Safe operation and power supply safety of the state of insulation of metal oxide arrester concerning power supply unit, due to capacitive apparatus it is easy because
The reasons such as humidified insulation, oil quality deterioration make it that insulation is impaired, thus need periodically to enter operating capacitive apparatus insulated state
Row live testing；Currently conventional detection method is using relative medium loss factor of corresponding device detection capacitive apparatus etc.
State parameter is simultaneously analyzed, and then judges and evaluate the state of insulation of tested capacitive apparatus.So-called relative medium loss
Factor, refer to that two capacitance type equipments measure two current phasors in the case of parallel connection or under the identical voltage of out-phase in electric capacity end
Difference, the numerical value of tangent conversion gained is carried out to the difference.
Be commonly used in the device that relative dielectric loss and capacitance are tested at present, exist insufficiency face, measuring accuracy it is not high,
Carry and operate the problems such as inconvenient, therefore, research and development it is a kind of it is full-featured, measuring accuracy is high, carry and relative Jie easy to use
Capacitance test is undermined, speed and quality, guarantee power supply safety to improving power supply department detection capacitive apparatus, it appears very must
Will.
The content of the invention
The purpose of the present invention is：For problems of the prior art, there is provided one kind is compact-sized, is easy to carry, makes
Used time is full-featured, measuring accuracy is high and easy to operate relative dielectric loss and capacitance tester.
The technical scheme is that：The relative dielectric loss and capacitance tester of the present invention, it is structurally characterized in that：Including just
Take formula box body and the circuit arrangement in portable box body；Above-mentioned circuit arrangement includes guidance panel, battery supply pipe
Manage unit, wireless communication unit, measuring unit and display control unit；
Display control unit electrically connects with wireless communication unit and measuring unit two-way signaling respectively；Battery power management list
It is used to provide working power when member uses；
Above-mentioned measuring unit includes reference voltage interface, reference current interface, is detected device current interface, with reference to electricity
Pressure/current regulating module, tested current regulating module, the anti-aliasing low pass filter of second order, AD conversion module, FFT data signals
Processing module and the second serial line interface；
Reference voltage interface, reference current interface and tested device current interface are respectively arranged on guidance panel；Ginseng
Voltage/current conditioning module is examined to electrically connect with reference voltage interface and reference current interface respectively；Tested current regulating module with
Tested device current interface electrical connection；The anti-aliasing low pass filter of second order respectively with reference voltage/current conditioning module and tested
Current regulating module electrically connects；AD conversion module electrically connects with the anti-aliasing low pass filter of second order；AD conversion module and FFT numerals
Signal processing module two-way signaling electrically connects；FFT digital signal processing modules electrically connect with the second serial line interface two-way signaling；
Display control unit includes main control module, Keysheet module, LCD MODULE, memory module, printer module, nothing
Line communication interface, measurement communication interface, host computer communication interface and USB flash disk interface；
Keysheet module, LCD MODULE, host computer communication interface and USB flash disk interface are respectively arranged on guidance panel
On；Printer module is arranged on carrying case；
Main control module electrically connects with Keysheet module signal；LCD MODULE and printer module are believed with main control module respectively
Number electrical connection；Main control module electrically connects with memory module and USB flash disk interface two-way signaling respectively；Main control module is connect by radio communication
Mouth communicates with wireless communication unit；The measurement communication interface of main control module and the second serial line interface two-way signaling electricity of measuring unit
Connection.
Further scheme is：Above-mentioned wireless communication unit includes the second control module, the first serial line interface, radio frequency and led to
Believe module, radio frequency power amplification modules and antenna；
Second control module electrically connects with the first serial line interface and radio-frequency communication module two-way signaling respectively；RF power amplification mould
Block electrically connects with radio-frequency communication module and antenna two-way signaling respectively.
Further scheme is：Above-mentioned battery power management unit include the first control module, switching on and shutting down detection module,
Charge management module, lithium battery, switching on and shutting down control module, DC-DC voltage reduction modules, charging inlet and power switch；Charging inlet
It is arranged on power switch on guidance panel；
First control module is provided with switching on and shutting down detection signal input, Charge Management signal communication end, switching on and shutting down control letter
Number output end and power supply output control terminal；Switching on and shutting down detection module is provided with signal input part and signal output part；Charge Management mould
Block is provided with charge power supply input, charging control signal communication ends and power output end；Lithium battery is provided with charge power supply input
And power output end；Switching on and shutting down control mould is provided with control signal input, power input and power output end；DC-DC is depressured
Module is provided with control signal input, power input and power output end；
The signal output end signal electricity of the switching on and shutting down detection signal input of first control module and switching on and shutting down detection module
Connection；The two-way letter of charging control signal communication ends at the Charge Management signal communication end and charge management module of the first control module
Number electrical connection；The signal input part of switching on and shutting down detection module electrically connects with power switch；The charge power supply of charge management module is defeated
Enter end to electrically connect with charging inlet；The charge power supply input of lithium battery electrically connects with the power output end of charge management module；
The control signal input of switching on and shutting down control mould electrically connects with the switching on and shutting down control signal output signal of the first control module；Open
The power input of shutdown control mould electrically connects with the power output end of lithium battery；The control signal input of DC-DC voltage reduction modules
End electrically connects with the power supply output control end signal of the first control module；The power input of DC-DC voltage reduction modules and switching on and shutting down
Control the power output end electrical connection of mould；The output power supply when power output end of DC-DC voltage reduction modules uses.
Further scheme is：The reference voltage/current conditioning module of above-mentioned measuring unit includes multi gear sample resistance
And variable gain amplifier；The anti-aliasing low pass filter of second order includes 1 second order Butterworth active low-pass filter and 1 one
The passive RC low pass filters of rank.
Further scheme is：The core devices of the AD conversion module of above-mentioned measuring unit are MSP430AFE253 models
The 8-digit microcontroller of super low-power consumption 16；The core devices of FFT digital signal processing modules are with FPU Float Point Unit
The CPU of STM32F405 models.
Further scheme is：The core devices of the main control module of above-mentioned display control unit are based on ARM7TDMI cores
S3C44B0 models high-performance microprocessor；The core devices of printer module are the miniature thermal printing of 8 parallel port communications
Machine.
Further scheme is：The core devices of the radio-frequency communication module of above-mentioned wireless communication unit are based on 433MHz
The radio frequency chip of the SI4463 models of frequency range.
Further scheme also has：The charge management module of above-mentioned battery power management unit detects including external power supply
Circuit, PWM charging circuits, battery voltage detection circuit and charging current detecting circuit；The core devices of first control module are
MSP430F2012 single-chip microcomputers；The core devices of DC-DC voltage reduction modules are the high efficiency switch power supply chip of LM2675 models.
The present invention has positive effect：（1）The relative dielectric loss and capacitance tester of the present invention, using portable box
Body, circuit arrangement is arranged in portable box body, compact-sized, be easy to carry, and is used suitable for power supply department outdoor study.
（2）The relative dielectric loss and capacitance tester of the present invention, during use wiring and operating carried out on guidance panel, operation interface
It is simple and clear；Giant-screen lattice lcd display being capable of each measurement data of real-time display during work；Measurement data automatically saves；It is micro-
The printable output measurement result of type thermal printer；Using external USB flash disk auxiliary storage；It is easy to operate very convenient, it is easy to grasp
Make librarian use.The composition passed through.（3）The relative dielectric loss and capacitance tester of the present invention, there is absolute method and relative method to survey
Function is measured, can flexibly be selected according to field condition；Possess a variety of detection functions, can live detection capacitance type equipment medium damage
Consumption, current in resistance property, the capacity current parameter of capacitance and Zinc-Oxide Arrester, and can be used as conventional dielectric loss measuring instrument device with
Verification；It is full-featured.（4）The relative dielectric loss and capacitance tester of the present invention, can tracking test signal automatically during its use
Frequency, adapt to the measurement of dielectric loss in the range of 45Hz~65Hz power frequencies；Sampled signal is turned after effectively filtering by high precision analogue
Parallel operation synchronizes high-speed sampling to reference signal and by trial signal, then carries out FFT to signal, is calculated by digital filtering
Method, obtain test item and with reference to capacity ratio and dielectric loss value between test product；Test data is not influenced from harmonic, strong antijamming capability；
Measuring accuracy is high.（5）The relative dielectric loss and capacitance tester, built-in high capacity lithium ion battery of the present invention, can continuously work 8
Hour, do not limited by live power supply；And there is automatic shut-off function, if in ten minutes without it is any operation if automatic shutdown.
Brief description of the drawings
Fig. 1 is the circuit structure schematic block diagram of the present invention；
Fig. 2 is the circuit structure schematic block diagram of the battery power management unit in Fig. 1；
Fig. 3 is the circuit structure schematic block diagram of the wireless communication unit in Fig. 1；
Fig. 4 is the circuit structure schematic block diagram of the measuring unit in Fig. 1；
Fig. 5 is the circuit structure schematic block diagram of the display control unit in Fig. 1.
Reference in above-mentioned accompanying drawing is as follows：
Battery power management unit 1, the first control module 11, switching on and shutting down detection module 12, charge management module 13, lithium electricity
Pond 14, switching on and shutting down control module 15, DC-DC voltage reduction modules 16, charging inlet 17, power switch 18；
Wireless communication unit 2, the second control module 21, the first serial line interface 22, radio-frequency communication module 23, RF power amplification mould
Block 24, antenna 25；
Measuring unit 3, reference voltage interface 31, reference current interface 32, tested device current interface 33, reference voltage/
Current regulating module 34, it is tested current regulating module 35, the anti-aliasing low pass filter 36 of second order, AD conversion module 37, FFT numerals
Signal processing module 38, the second serial line interface 39；
Display control unit 4, main control module 41, Keysheet module 42, LCD MODULE 43, memory module 44, printer
Module 45, wireless communication interface 46, measure communication interface 47, host computer communication interface 48, USB flash disk interface 49.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
（Embodiment 1）
See Fig. 1, the relative dielectric loss and capacitance tester of the present embodiment, mainly by carrying case and installed in portable
Circuit arrangement composition in box body.Circuit arrangement mainly includes guidance panel, battery power management unit 1, wireless communication unit
2nd, measuring unit 3 and display control unit 4.
Display control unit 4 electrically connects with wireless communication unit 2 and the two-way signaling of measuring unit 3 respectively, battery supply pipe
Manage and be used to provide working power to other each units when unit 1 uses；In the present embodiment, display control module 4 and measurement module 3
And the communication mode of wireless communication module 2 preferably uses RS232 bus communications.
See Fig. 2, battery power management unit 1 is mainly by the first control module 11, switching on and shutting down detection module 12, Charge Management
Module 13, lithium battery 14, switching on and shutting down control module 15, DC-DC voltage reduction modules 16, charging inlet 17 and power switch 18 form.
First control module 11 is provided with switching on and shutting down detection signal input, Charge Management signal communication end, switching on and shutting down control
Signal output part and power supply output control terminal；Switching on and shutting down detection module 12 is provided with signal input part and signal output part；Charging valve
Reason module 13 is provided with charge power supply input, charging control signal communication ends and power output end；Lithium battery 14 is provided with charging electricity
Source input and power output end；Switching on and shutting down control mould 15 is provided with control signal input, power input and power output end；
DC-DC voltage reduction modules 16 are provided with control signal input, power input and power output end；Charging inlet 17 and power switch
18 are arranged on guidance panel；
The switching on and shutting down detection signal input of first control module 11 is believed with the signal output part of switching on and shutting down detection module 12
Number electrical connection；The Charge Management signal communication end of first control module 11 communicates with the charging control signal of charge management module 13
Hold two-way signaling electrical connection；The signal input part of switching on and shutting down detection module 12 electrically connects with power switch 18；Charge management module
13 charge power supply input electrically connects with charging inlet 17；The charge power supply input of lithium battery 14 and charge management module 13
Power output end electrical connection；The switching on and shutting down of the control signal input and the first control module 11 of switching on and shutting down control mould 15 control
Signal output end signal electrically connects；The power input of switching on and shutting down control mould 15 electrically connects with the power output end of lithium battery 14；
The control signal input of DC-DC voltage reduction modules 16 electrically connects with the power supply output control end signal of the first control module 11；DC-
The power input of DC voltage reduction modules 16 electrically connects with the power output end of switching on and shutting down control mould 15；DC-DC voltage reduction modules 16
It is used to provide working power to other each units when power output end uses.
MSP430F2012 single-chip microcomputers are preferably used in core devices the present embodiment of first control module 11, its dominant frequency is
16MHz, there is PWM timers, it is the pwm signal that the bit resolutions of 62.5KHZ 8 are that can produce frequency, 10 AD moulds of multichannel
Number converter can gather cell voltage and electric current.
Switching on and shutting down detection module 12 is used to detect whether power switch 18 is pressed and the signal of detection is transferred into the first control
It is start or shutdown that molding block 11, which judges,.
Charge management module 13 includes whether the detection circuit, PWM charging circuits, battery voltage detection circuit of external power supply
And charging current detecting circuit；Charge management module 13 under the control of the first control module 11 to lithium battery 14 carry out charging and
Management.
Switching on and shutting down control module 15 can be cut off to DC-DC voltage reduction modules 16 under the control of the first control module 11 and power electricity
Source, realize automatic shutdown；Preferably using LM2675 high efficiency switch electricity in core devices the present embodiment of DC-DC voltage reduction modules 16
Source chip, its output is 5V.
See Fig. 3, wireless communication unit 2 is mainly by the second control module 21, the first serial line interface 22, radio-frequency communication module
23rd, radio frequency power amplification modules 24 and antenna 25 form.
Second control module 21 electrically connects with the first serial line interface 22 and the two-way signaling of radio-frequency communication module 23 respectively；Radio frequency
Power amplifier module 24 electrically connects with radio-frequency communication module 23 and the two-way signaling of antenna 25 respectively.
The less radio-frequency core based on 433MHz frequency ranges is preferably used in core devices the present embodiment of radio-frequency communication module 23
Piece SI4463；First serial line interface 22 uses UART serial line interfaces, for being communicated with display control unit 4；RF power amplification is set
The purpose of module 24 be using when with supporting host computer realize that long-haul reliable communicates to realize data interaction.The present embodiment
In, its under the conditions of spaciousness wireless telecommunications horizon grange up to 2 kilometers.
See Fig. 4, measuring unit 3 is mainly by reference voltage interface 31, reference current interface 32, tested device current interface
33rd, reference voltage/current conditioning module 34, tested current regulating module 35, the anti-aliasing low pass filter 36 of second order, AD conversion mould
Block 37, the serial line interface 39 of FFT digital signal processing modules 38 and second form.
Reference voltage interface 31, reference current interface 32 and tested device current interface 33 are respectively arranged on guidance panel
On；Reference voltage/current conditioning module 34 electrically connects with reference voltage interface 31 and reference current interface 32 respectively；Tested electric current
Conditioning module 35 electrically connects with tested device current interface 33；The anti-aliasing low pass filter 36 of second order respectively with reference voltage/electricity
Stream conditioning module 34 and tested current regulating module 35 electrically connect；The electricity of low pass filter 36 anti-aliasing with second order of AD conversion module 37
Connection；AD conversion module 37 electrically connects with the two-way signaling of FFT digital signal processing modules 38；FFT digital signal processing modules 38
Electrically connected with the two-way signaling of the second serial line interface 39；Second serial line interface 39 and display control unit 4 communicate.
Reference voltage/current conditioning module 34 includes multi gear sample resistance and variable gain amplifier, and input letter can be achieved
Number super wide range measurement.
The anti-aliasing low pass filter 36 of second order includes 1 typical second order Butterworth active low-pass filter and 1 one
The passive RC low pass filters of rank, to realize effective digital filtering.
Preferably using Texas Instruments TI for metering and intelligence in core devices the present embodiment of AD conversion module 37
The 8-digit microcontroller of MSP430AFE2xx series metering analog front end (AFE) super low-power consumption 16 that power grid application is released.
Preferably using STMicw Electronics ST productions in core devices the present embodiment of FFT digital signal processing modules 38
The CPU of STM32F405 models of the Cortex-M4 with FPU Float Point Unit.
See Fig. 5, display control unit 4 is mainly by main control module 41, Keysheet module 42, LCD MODULE 43, storage mould
49 groups of block 44, printer module 45, wireless communication interface 46, measurement communication interface 47, host computer communication interface 48 and USB flash disk interface
Into.
Keysheet module 42, LCD MODULE 43, host computer communication interface 48 and USB flash disk interface 49 are respectively arranged on behaviour
Make on panel；Printer module 45 is arranged on carrying case.
Main control module 41 electrically connects with the signal of Keysheet module 42；LCD MODULE 43 and printer module 45 respectively with master
Control the electrical connection of the signal of module 41；Main control module 41 electrically connects with memory module 44 and the two-way signaling of USB flash disk interface 49 respectively；Master control mould
Block 41 is electrically connected by wireless communication interface 46 with the two-way signaling of the first serial line interface 22 of wireless communication unit 2；Main control module
41 are electrically connected by measuring communication interface 47 with the two-way signaling of the second serial line interface 39 of measuring unit 3；Main control module 41 is optional
Electrically connected by host computer communication interface 48 with supporting host computer wire signal to selecting property.
S3C44B0 of the Samsung based on ARM7TDMI cores is preferably used in core devices the present embodiment of main control module 41
The high-performance microprocessor of model.Preferably using the miniature of 8 parallel port communications in the core devices the present embodiment of printer module 45
Thermal printer.
（Application examples）
The relative dielectric loss and capacitance tester of previous embodiment, its when in use operation principle and the course of work summary
It is as follows：
Battery power management unit 1 is responsible for carrying out the lithium battery 14 built in instrument management of charging and discharging and produces each module
Working power and control power switch machine；Display control unit 4 is responsible for man-machine interaction, is responsible for monitoring user and passes through Keysheet module
42 operate and make corresponding display, and control measuring unit 3 measures and reads measurement data and perform display, storage
The operation such as deposit, print, being responsible for sending measured data to radio communication unit 2；Radio communication unit 2 is responsible for and supporting setting
Host computer on-line communication, uploads to host computer by measurement data in real time.Display control unit 4 and measuring unit 3 and channel radio
Unit 2 is interrogated using the communication of RS232 forms, whole instrument is unified by being responsible for coordinating to control each module to press based on display control unit 4
Flow works.
The relative dielectric loss and capacitance tester of previous embodiment, support from PT secondary sides power taking pressure as the absolute of reference
Mensuration takes relative measurement method of the same phase test product as reference；It correctly connects according to the object of required measurement when in use
After line, press power switch 18 and start shooting, instrument can be operated automatically：
Measuring unit 3 is mainly responsible for PT secondary sides voltage, the collection of end shield leakage current data and Digital Signal Processing；Survey
The reference voltage/current conditioning module 34 or tested current regulating module 35 for measuring unit 3 obtain signal through two from corresponding interface
AD conversion module 37 is sent a signal to after the anti-aliasing 36 effective digital filtering of low pass filter of rank；AD conversion module 37 exists
Data signal is converted analog signals under the control of FFT digital signal processing modules 38 and digital quantity is sent to FFT automatically
The calculating of digital signal processing module 38 is handled, and FFT digital signal processing modules 38 are by data through Fast Fourier Transform (FFT)（FFT）And
Spectrum leakage correcting algorithm calculates the parameters such as voltage, current effective value, frequency, phase difference.
Display control unit 4 receives keyboard commands, finishing man-machine interaction by Keysheet module 42；Display control unit 4 with
Measuring unit 3 communicates, and control measuring unit 3 starts the measurement data for measuring and reading measuring unit 3 in real time, on the one hand passes through liquid
Brilliant display module 43 carries out real-time display；Memory module 44 is stored, and can also be deposited if necessary by USB flash disk interface 49 using USB flash disk
Store up data；Printer module 45 performs printout；Data are passed through wireless communication unit 2 by another aspect display control unit 4
Supporting host computer is uploaded in real time implements synchronization monitoring.
The relative dielectric loss and capacitance tester of previous embodiment, its functional characteristics when in use have：
1. being provided simultaneously with absolute method and relative method measurement function, can flexibly be selected according to field condition；
2. possess a variety of detection functions, can dielectric loss, capacitance and the zinc oxide of live detection capacitance type equipment take shelter from the thunder
The current in resistance property of device, capacity current parameter, and conventional dielectric loss measuring instrument device can be used as（Apply power supply outside）Use and verify；
3. the capacity ratio and relative dielectric loss value of measurable display tested device and reference device, also first insert reference device
Test data, the capacitance and dielectric loss value of direct-reading tested device, are easy to and power failure test data compares；
4. internal synchronize high-speed sampling using high-precision adc to reference signal and by trial signal, then to letter
Number FFT is carried out, by digital filtering algorithm, obtain test item and with reference to capacity ratio and dielectric loss value between test product；Test number
According to being not influenced from harmonic, strong antijamming capability；
5. can tracking test signal automatically frequency, adapt to the measurement of dielectric loss in the range of 45Hz~65Hz power frequencies；
6. each measurement data of real-time display, and can continuously measure and save as data sheet；Up to 4000 groups can be preserved in machine
Measurement data, measurement result can be also stored to external USB flash disk；The printable output measurement result of minitype thermal printer；
7. built-in high capacity lithium ion battery, it can continuously work 8 hours, measurement handy to carry about, not powered by scene
Power supply limits；With automatic shut-off function, without any operation automatic shutdown in ten minutes；
8. giant-screen lattice lcd display, can clearly it show under sunlight；Operation interface is simple and clear, and user only need to be by carrying
Show operation；
9. having RS232 and USB interface, software upgrading can be carried out with USB flash disk.
With respect to dielectric loss and capacitance tester, its key technical indexes when in use is as follows：
Power supply：The included core lithium ion battery of Large Copacity 12；
Charge power supply：AC100V~220V 50Hz/60Hz；
Operating ambient temperature：- 10 °C~50 °C；
Working environment humidity：30%~85%；
Current measuring range：100uA~1A；
Current measuring range：1mA~1A；
Current measurement precision： ±（0.5% reading+10uA）；
Reference voltage input range：1~300V；
Dielectric loss measurement scope：- 200%~+200%, minimum resolution 0.001%；
Dielectric loss measurement precision： ±（1% reading+0.0005）；
Capacitance ratio measurement range：1.000E-4~1.000E+4；
Capacitance ratio measurement accuracy： ±（0.5% word of reading+5）；
Electric capacity measuring scope：10pF~0.5uF；
Electric capacitance measurement accuracy of measurement： ±（0.5% reading+1pF）；
Total current measurement scope：100uA~1A；
Current in resistance property measurement range：10 μ A~100mA；
Current in resistance property measurement accuracy： ±（Reading × 5%+5uA）；
Capacity current measurement range：100 μ A~500mA；
Capacity current measurement accuracy： ±（Reading × 5%+5uA）；
Phase measurement scope：0 °~360 °；
Phase measurement accuracy： ±0.1°；
Earth current measurement range：5mA~30A；
Earth current measurement accuracy： ±（1% reading+1mA）；
Frequency measurement scope：F=45Hz~65Hz；
Frequency measurement accuracy： ±0.5Hz.
Above example is the explanation to the embodiment of the present invention, rather than limitation of the present invention, relevant technology
The technical staff in field without departing from the spirit and scope of the present invention, can also make various conversion and change and obtain
To corresponding equivalent technical scheme, therefore all equivalent technical schemes should be included into the patent protection model of the present invention
Enclose.
Claims (5)
1. a kind of relative dielectric loss and capacitance tester, it is characterised in that：Including carrying case and installed in carrying case
Interior circuit arrangement；Described circuit arrangement includes guidance panel, battery power management unit（1）, wireless communication unit（2）、
Measuring unit（3）And display control unit（4）；
Display control unit（4）Respectively with wireless communication unit（2）And measuring unit（3）Two-way signaling electrically connects；Battery supply
Administrative unit（1）It is used to provide working power during use；
Described measuring unit（3）Including reference voltage interface（31）, reference current interface（32）, tested device current interface
（33）, reference voltage/current conditioning module（34）, tested current regulating module（35）, the anti-aliasing low pass filter of second order（36）、
AD conversion module（37）, FFT digital signal processing modules（38）With the second serial line interface（39）；
Reference voltage interface（31）, reference current interface（32）With tested device current interface（33）Respectively it is arranged on operating surface
On plate；Reference voltage/current conditioning module（34）Respectively with reference voltage interface（31）With reference current interface（32）Electrical connection；
Tested current regulating module（35）With tested device current interface（33）Electrical connection；The anti-aliasing low pass filter of second order（36）Respectively
With reference voltage/current conditioning module（34）With tested current regulating module（35）Electrical connection；AD conversion module（37）With second order
Anti-aliasing low pass filter（36）Electrical connection；AD conversion module（37）With FFT digital signal processing modules（38）Two-way signaling electricity
Connection；FFT digital signal processing modules（38）With the second serial line interface（39）Two-way signaling electrically connects；
Display control unit（4）Including main control module（41）, Keysheet module（42）, LCD MODULE（43）, memory module
（44）, printer module（45）, wireless communication interface（46）, measurement communication interface（47）, host computer communication interface（48）And USB flash disk
Interface（49）；
Keysheet module（42）, LCD MODULE（43）, host computer communication interface（48）And USB flash disk interface（49）Respectively set
On guidance panel；Printer module（45）It is arranged on carrying case；
Main control module（41）With Keysheet module（42）Signal electrically connects；LCD MODULE（43）And printer module（45）Respectively
With main control module（41）Signal electrically connects；Main control module（41）Respectively with memory module（44）With USB flash disk interface（49）Two-way signaling
Electrical connection；Main control module（41）Pass through wireless communication interface（46）With wireless communication unit（2）Communication；Main control module（41）Survey
Measure communication interface（47）With measuring unit（3）The second serial line interface（39）Two-way signaling electrically connects；
Described battery power management unit（1）Including the first control module（11）, switching on and shutting down detection module（12）, Charge Management
Module（13）, lithium battery（14）, switching on and shutting down control module（15）, DC-DC voltage reduction modules（16）, charging inlet（17）Opened with power supply
Close（18）；Charging inlet（17）And power switch（18）It is arranged on guidance panel；
First control module（11）Provided with switching on and shutting down detection signal input, Charge Management signal communication end, switching on and shutting down control letter
Number output end and power supply output control terminal；Switching on and shutting down detection module（12）Provided with signal input part and signal output part；Charging valve
Manage module（13）Provided with charge power supply input, charging control signal communication ends and power output end；Lithium battery（14）Provided with filling
Electric power input and power output end；Switching on and shutting down control mould（15）Provided with control signal input, power input and power supply
Output end；DC-DC voltage reduction modules（16）Provided with control signal input, power input and power output end；
First control module（11）Switching on and shutting down detection signal input and switching on and shutting down detection module（12）Signal output part letter
Number electrical connection；First control module（11）Charge Management signal communication end and charge management module（13）Charging control signal
Communication ends two-way signaling electrically connects；Switching on and shutting down detection module（12）Signal input part and power switch（18）Electrical connection；Charging
Management module（13）Charge power supply input and charging inlet（17）Electrical connection；Lithium battery（14）Charge power supply input with
Charge management module（13）Power output end electrical connection；Switching on and shutting down control mould（15）Control signal input with first control
Module（11）Switching on and shutting down control signal output signal electrical connection；Switching on and shutting down control mould（15）Power input and lithium battery
（14）Power output end electrical connection；DC-DC voltage reduction modules（16）Control signal input and the first control module（11）'s
Power supply output control end signal electrically connects；DC-DC voltage reduction modules（16）Power input and switching on and shutting down control mould（15）Electricity
Source output terminal electrically connects；DC-DC voltage reduction modules（16）Power output end use when output power supply；
Described measuring unit（3）Reference voltage/current conditioning module（34）Put including multi gear sample resistance and variable gain
Big device；The anti-aliasing low pass filter of second order（36）Including 1 second order Butterworth active low-pass filter and 1 passive RC of single order
Low pass filter；
Described battery power management unit（1）Charge management module（13）Including external power supply detection circuit, PWM charging electricity
Road, battery voltage detection circuit and charging current detecting circuit；First control module（11）Core devices be MSP430F2012
Single-chip microcomputer；DC-DC voltage reduction modules（16）Core devices be LM2675 models high efficiency switch power supply chip.
2. relative dielectric loss and capacitance tester according to claim 1, it is characterised in that：Described wireless communication unit
（2）Including the second control module（21）, the first serial line interface（22）, radio-frequency communication module（23）, radio frequency power amplification modules（24）With
Antenna（25）；
Second control module（21）Respectively with the first serial line interface（22）And radio-frequency communication module（23）Two-way signaling electrically connects；Penetrate
Frequency power amplifier module（24）Respectively with radio-frequency communication module（23）And antenna（25）Two-way signaling electrically connects.
3. relative dielectric loss and capacitance tester according to claim 1, it is characterised in that：Described measuring unit（3）
AD conversion module（37）Core devices be MSP430AFE253 models the 8-digit microcontroller of super low-power consumption 16；FFT numerals
Signal processing module（38）Core devices be the STM32F405 models with FPU Float Point Unit CPU.
4. relative dielectric loss and capacitance tester according to claim 1, it is characterised in that：Described display control unit
（4）Main control module（41）Core devices be the S3C44B0 models based on ARM7TDMI cores high-performance microprocessor；Printing
Machine module（45）Core devices for 8 parallel port communications minitype thermal printer.
5. relative dielectric loss and capacitance tester according to claim 2, it is characterised in that：Described wireless communication unit
（2）Radio-frequency communication module（23）Core devices be the SI4463 models based on 433MHz frequency ranges radio frequency chip.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510442774.4A CN104991127B (en) | 2015-07-24 | 2015-07-24 | With respect to dielectric loss and capacitance tester |
| CN201810105070.1A CN108490266B (en) | 2015-07-24 | 2015-07-24 | Relative dielectric loss and capacitance tester |
| PCT/CN2016/090834 WO2017016431A1 (en) | 2015-07-24 | 2016-07-21 | Relative dielectric loss and capacitance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510442774.4A CN104991127B (en) | 2015-07-24 | 2015-07-24 | With respect to dielectric loss and capacitance tester |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810105070.1A Division CN108490266B (en) | 2015-07-24 | 2015-07-24 | Relative dielectric loss and capacitance tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104991127A CN104991127A (en) | 2015-10-21 |
| CN104991127B true CN104991127B (en) | 2018-03-20 |
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| CN201510442774.4A Active CN104991127B (en) | 2015-07-24 | 2015-07-24 | With respect to dielectric loss and capacitance tester |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810105070.1A Active CN108490266B (en) | 2015-07-24 | 2015-07-24 | Relative dielectric loss and capacitance tester |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017016431A1 (en) * | 2015-07-24 | 2017-02-02 | 国网江苏省电力公司常州供电公司 | Relative dielectric loss and capacitance tester |
| CN105445561A (en) * | 2015-11-10 | 2016-03-30 | 广西电网有限责任公司电力科学研究院 | Wireless measurement instrument for state of electrical equipment in substation |
| CN107070430B (en) * | 2017-05-04 | 2023-08-11 | 中国石油天然气集团有限公司 | Analog circuit and method for conditioning underground engineering parameter measurement signals |
| CN108459208A (en) * | 2018-04-18 | 2018-08-28 | 国家电网公司 | Relative medium is lost and the separate switching device of the remote control of capacitance ratio test |
| CN110346648B (en) * | 2019-07-05 | 2021-08-24 | 杭州西湖电子研究所 | Three-dimensional map expression method for wide-area relative capacitance ratio |
| CN110346647B (en) * | 2019-07-05 | 2021-06-01 | 杭州西湖电子研究所 | Three-dimensional map expression method for wide-area relative current ratio |
| CN110632396B (en) * | 2019-11-05 | 2021-09-14 | 国网黑龙江省电力有限公司电力科学研究院 | Cable dielectric loss measuring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649962A (en) * | 1979-10-01 | 1981-05-06 | Showa Electric Wire & Cable Co Ltd | Measuring method for dielectric loss tangent |
| JPS57182181A (en) * | 1981-04-30 | 1982-11-09 | Mitsubishi Electric Corp | Measuring device for electrostatic capacitance and dielectric loss tangent |
| CN1253773C (en) * | 2004-03-31 | 2006-04-26 | 李明 | Power source management system and method thereof based on software and hardware cooperative management |
| CN1793990A (en) * | 2005-12-29 | 2006-06-28 | 西安电子科技大学 | On-line monitoring system for capacitor type equipment dielectricless |
| CN101493485B (en) * | 2009-03-09 | 2011-04-06 | 浙江纪元电气集团有限公司 | On-line monitoring system for capacitive equipment dielectric loss angle |
| CN201464575U (en) * | 2009-07-19 | 2010-05-12 | 北京浩天中胜科技有限公司 | Portable comprehensive test instrument for capacitor |
| CN202533548U (en) * | 2012-02-03 | 2012-11-14 | 中国电力科学研究院 | High-voltage capacitive device on-line insulation detection device provided with battery for supplying power |
| CN102680799B (en) * | 2012-05-15 | 2015-05-27 | 山东惠工电气股份有限公司 | Transformer substation capacitor on-line monitoring method and device based on wireless mode |
| DE102012016686A1 (en) * | 2012-08-24 | 2014-05-15 | Michael Rösner | Method for measuring dielectric loss factor of electrical insulation of high-voltage devices, involves detecting electric field strength at measuring point on high voltage side of high-voltage device |
| CN103105520B (en) * | 2013-01-11 | 2015-07-08 | 广州供电局有限公司 | Electrification testing device of capacitive equipment |
| CN203720273U (en) * | 2014-02-28 | 2014-07-16 | 国家电网公司 | Transformer dielectric loss and insulation resistor tester |
| CN203800648U (en) * | 2014-03-05 | 2014-08-27 | 深圳市统凌科技有限公司 | Multifunctional backup power supply |
| CN204855653U (en) * | 2015-07-24 | 2015-12-09 | 江苏省电力公司常州供电公司 | Relative jie is decreased and capacitance tester |
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2015
- 2015-07-24 CN CN201810105070.1A patent/CN108490266B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108490266B (en) | 2020-09-08 |
| CN104991127A (en) | 2015-10-21 |
| CN108490266A (en) | 2018-09-04 |
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