CN205228803U - Isolator state test device - Google Patents
Isolator state test device Download PDFInfo
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- CN205228803U CN205228803U CN201521021309.5U CN201521021309U CN205228803U CN 205228803 U CN205228803 U CN 205228803U CN 201521021309 U CN201521021309 U CN 201521021309U CN 205228803 U CN205228803 U CN 205228803U
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 11
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
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Abstract
The utility model discloses an isolator state test device, including the torque sensor, the torque sensor is connected to the singlechip through the digital analog conversion module, and the communication conversion module who is used for with the host computer communication is still connected to the singlechip. The utility model discloses can gather the isolator operating torque data in real time, staff's accessible torque value changes and comes analysis isolator state, can sparingly type in a large number with time of insitu analysis, improved the precision and the efficiency of test greatly, the measuring accuracy reaches 1NM, response time is higher than 14 seconds, it is high -efficient stable still to have data communication in addition, convenient to carry, low cost installs and use characteristics such as simple and easy.
Description
Technical field
The utility model relates to power system device maintenance technology field, is specially a kind of disconnector state testing device.
Background technology
High voltage isolator is the high voltage electric equipment that in electric system, use amount is maximum, range of application is the widest, and its major function is isolation voltage, but not cut-offs load current and fault current.But for a long time, disconnector operational reliability is lower, the problem of faults frequent annoyings electric power overhaul personnel always, traces it to its cause, and is many-sided.
Disconnector transmission link is directly exposed in air to undergo and exposes to the sun and rain on the one hand, and number of operations is few at ordinary times, and the transmission portion such as pivot pin, bearing lacks lubrication and relative motion, and therefore the situation of its operation bite is more.
On the other hand at the production link of disconnector, because disconnector structure is relatively simple, be easy to manufacture, therefore in the past in a very long time, high voltage isolator is often produced as a kind of addition product supporting with isolating switch by manufacturing firm, attention degree is inadequate, so comparatively isolating switch, disconnector Performance and quality is difficult to be ensured.Disconnector break down often and critical defective proportion is quite high.
In the today of carrying out in an all-round way repair based on condition of component, station personnel are as the proposition of the estimator of equipment state and Strategies of Maintenance, implementer, need correct judgement, make and correctly overhaul countermeasure, and then reach the effect of maintenance, extension device is in the network operation time, and can the prerequisite that complete this target be whether maintainer grasps the information of equipment each side comprehensively.Therefore, the task of top priority is that maintainer in limited maintenance number of times, should understand the actual state of equipment as far as possible all sidedly.
At present, electrical production scene mainly relies on the analysis of manpower and intuition experience to judge to the maintenance of disconnector, the feel many times also rested on by staff determines whether clamping stagnation and lacks the fault of lubrication, obviously manual test is relied on merely, test is according to insufficient, measuring accuracy is low, and the accuracy rate of test result is low.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of disconnector state testing device, can Real-time Collection disconnecting switch operation time moment values, analyze disconnector state to be changed by moment values, effectively can improve precision and the efficiency of disconnector state verification.Technical scheme is as follows:
A kind of disconnector state testing device, comprise torque sensor, torque sensor is connected to single-chip microcomputer by D/A converter module, and single-chip microcomputer also connects for the communication conversion module with upper machine communication.
Further, described torque sensor is strain type torque sensor or torsion angle phase difference sensor.
Further, the described D/A converter module digital filter that comprises sigma-delta modulator and be attached thereto.
Further, described single-chip microcomputer is MSP430 series monolithic.
Further, described connecting communication modular converter is RS232-USB interface convertor.
Further, also comprise LCD display module, LCD display module connects described single-chip microcomputer.
Further, described LCD display module is segment liquid crystal screen.
Further, also comprise storage unit, storage unit connects described single-chip microcomputer.
Further, described storage unit is EEPROM storage chip.
The beneficial effects of the utility model are: the utility model can Real-time Collection isolator operation moment data, staff analyzes disconnector state by moment values change, the time of typing and on-the site analysis can be saved in a large number, substantially increase precision and the efficiency of test, measuring accuracy reaches 1NM, and the response time was higher than 1/4 second, in addition also there is data communication efficient stable, easy to carry, with low cost, install and use the features such as simple and easy.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model disconnector state testing device.
Fig. 2 is moment-time plot.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.As shown in Figure 1, a kind of disconnector state testing device, comprise torque sensor, torque sensor is connected to single-chip microcomputer by D/A converter module, and single-chip microcomputer also connects for the communication conversion module with upper machine communication; Also comprise the LCD display module and storage unit that are connected with single-chip microcomputer.Ultimate principle is: the moment values detected is converted to electric signal by torque sensor, through amplifying and sending data to host computer by USB interface after digitized processing, and completes the operations such as record, storage, analysis and generating report forms by the software kit on it.
Torque sensor can adopt strain type torque sensor, because cost is controlled, easy and simple to handle, is to use maximum a kind of torque sensors both at home and abroad at present.Resistance strain gage is pasted onto measurand surface of elastomer assigned address, due to the stressed generation strain of elastic body, the resistance of resistance strain gage is caused to change, by resistance bridge and metering circuit, strain is converted to electric quantity signal (voltage, electric current, frequency etc.), thus measures torque value.Adopt foil gauge to measure moment of torsion and have following advantages: 1) sensitivity of monitor strain and precision high; 2) size of foil gauge is little, lightweight, there is no impact to the duty of measured piece and stress distribution; 3) measurement range is large; 4) precision is high, frequency response is fast, good reliability, life-span are long.
Torque sensor also can adopt torsion angle phase difference sensor.This sensor is installed with two groups of identical gears of the number of teeth, shape and setting angle, is respectively installed with one close to (magnetic or light) sensor in the outside of gear.When elastic shaft rotates, this two sensors just can measure two group pulse ripples, and the phase differential comparing the edge, front and back of this two group pulses ripple just can calculate the torque capacity that elastic shaft bears.
The main task of analog-to-digital conversion module (A/D) is that the analog electrical signal provided by torque sensor is converted to single-chip microcomputer (MCU) receivable digital signal after treatment.This module mainly adopts ∑-Δ converter, and this converter is made up of sigma-delta modulator and connection and subsequent digital filter.The structure proximate of modulator, in dual slope A-D converter, comprises 1 integrator and 1 comparer, and the feedback loop containing 11 figure place weighted-voltage D/A converter.This built-in digital to analog converter is only a switch, and integrator input is switched to a plus or minus reference voltage by it.∑-Δ analog to digital converter also comprises a clock unit, for modulation and digital filter provide suitable timing.Narrow band signal is quantized by with low-down resolution (1) after sending into ∑-Δ analog to digital converter, but sample frequency is very high.This converter has low price, high-performance (high resolving power); Integrated digital filtering; With DSP technical compatibility, be convenient to realize the features such as the system integration.
The control core MCU of test mainly completes data processing, stores, display, the functions such as communication.The present embodiment adopts efficiently a, the microprocessor MSP430 of low-power consumption, and this processor is applied to more to be needed, in battery powered portable instrument, to meet very much the requirement of this device.This processor mainly contains the feature of the following aspects:
1) processing power is strong: MSP430 series monolithic is the single-chip microcomputer of 16, have employed reduced instruction set computer (RISC) structure, there is abundant addressing mode (7 kinds of source operand addressing, 4 kinds of destination operand addressing), 27 succinct core instructions and a large amount of dummy instructions; In a large amount of registers and sheet, data-carrier store all can participate in multiple computing; To table look-up efficiently in addition processing instruction.These features ensure that and can develop high efficiency source program.
2) fast operation: MSP430 series monolithic under the driving of 25MHz crystal, can realize the instruction cycle of 40ns.The data width of 16, the instruction cycle of 40ns and multi-functional hardware multiplier (can realize multiply-add operation) match, and can realize some algorithm (as FFT etc.) of digital signal processing.
3) super low-power consumption: why MSP430 single-chip microcomputer has ultralow power consumption is because it has its distinctive feature in the supply voltage reducing chip and flexible and controlled operation clock.First, what the supply voltage of MSP430 series monolithic adopted is 1.8-3.6V voltage.When it thus can be made to run under the Clock of 1MHz, the minimum meeting of electric current of chip is at 165 μ about A, and the lowest power consumption under RAM Holdover mode only has 0.1 μ A.Secondly, unique Clock System Design.The clock system that two different is had: fundamental clock system, FLL (FLL and FLL+) clock system and DCO digital oscillator clock system in MSP430 series.
4) aboundresources in sheet: each series of MSP430 series monolithic is all integrated with more rich interior peripheral hardware.Relevant to this testing tool has: house dog, analog comparator, timer, UART, liquid crystal driver, 16 sigma-delta ADC, DMA, I/O ports, basic timer (BasicTimer), real-time clock (RTC) etc.Wherein, house dog can make to reset rapidly during program out of control; Analog comparator carries out the comparison of analog voltage, coordinates timer, can design A/D converter; 16 sigma-delta ADC converters have higher switching rate, reach as high as 200kbps, can meet most of data acquisition application; And in order to increase data rate, and the dma module adopted.The One Chip Solutions being set to system inside and outside these sheets of MSP430 series monolithic provides great convenience.In addition, the interrupt source of MSP430 series monolithic is more, and can be nested arbitrarily, flexible during use.When system is in the low power consumpting state of power saving, interrupting waking up only needs 5 μ s.
Proving installation and host computer carry out the conversion that communication needs to carry out interface, the RS232-USB interface convertor that a kind of height that the present embodiment adopts Prolific company to produce is integrated, can provide the solution that a RS232 full duplex asynchronous serial communication device is connected with USB functional interface facility.The high compatibility of this chip drives and can intend into traditional C OM port at large multiple operating system patrix, and allows to convert USB interface application easily to based on COM port application, and communication baud rate is up to 6Mb/s.All having low in energy consumption when mode of operation and park mode, is the ideal chose of embedded system handheld device.This device has following characteristics: complete compatible USB1.1 agreement; Adjustable 3 ~ 5V output voltage, meets 3V, 3.3V and 5V different application demand; Support complete RS232 interface, the baud rate of setting able to programme: 75b/s ~ 6Mb/s, and provide power supply for external serial interface; The bi-directional data buffer memory that 512 bytes are adjustable; Support the ROM of acquiescence and outside EEPROM storage device configurations information, there is I2C bus interface, support from the Remote Wake Up of outside MODEM signal.
LCD display module adopts field formula liquid crystal display, this display screen display type and charactron similar, piece together raw numerical monitor by 7 fields.Generally can only show 0 ~ 9, A ~ F16 kind character.This LCD drives simple, and power consumption is little, and needing, the applications of display numeral is more, and the occasion be also used in portable use, to replace charactron, is usually used in counter, electronic watch, digital multimeter.Use the I/O port analog liquid crystal driver Direct driver liquid crystal of MSP430 in system, do not need external any lcd controller, the method saves hardware cost, reduces equipment power dissipation.
Consider the stability of data, the present embodiment have employed the EEPROM(EEPROM (Electrically Erasable Programmable Read Only Memo) of a 32K) chip carries out data storage, and its principal feature is that after power down, data are not lost.This chip can record 107 groups of data altogether, often organizes 150 measured values, every bar measured value 2 byte; Often organize 306 bytes (comprising 150 torque values and a temporal information), use 32742 bytes altogether, remain 26 bytes and be used for recording EEPROM use information and reserved byte.
For the feature of disconnector stress data, method of testing is as follows:
1) torque sensor is arranged on the elastic shaft of disconnector, with T
1the moment values during time interval continuous acquisition disconnecting switch operation of second (such as 0.1S), single acquisition duration is T
2second (such as 15 seconds).
2) moment-time curve is generated according to the moment values collected.Be specially, after transferring data to host computer by USB interface, upper computer software system completes main stress characteristic parameter and the calculating of quantizating index thereof, and intuitively shows with pictorialization.
3) according to smoothness of curve detection and isolation on off state.Concrete determination methods is, if curve is smoother, then can detection and isolation on off state good; If curve has more sharp-pointed flex point or occurs lines rapid take-off and landing, then show that isolator operation is not smooth, may be because there is the phenomenons such as clamping stagnation, then be judged as that disconnector state is bad.Inner integrated data library facility simultaneously, can record the disconnector data of collection, derived data carries out secondary analysis to PC.The software of analysis platform, based on Win8 operating system, may operate on notebook panel computer.System stability is compatible good.
Claims (9)
1. a disconnector state testing device, is characterized in that, comprises torque sensor, and torque sensor is connected to single-chip microcomputer by D/A converter module, and single-chip microcomputer also connects for the communication conversion module with upper machine communication.
2. disconnector state testing device according to claim 1, is characterized in that, described torque sensor is strain type torque sensor or torsion angle phase difference sensor.
3. disconnector state testing device according to claim 1, is characterized in that, the digital filter that described D/A converter module comprises sigma-delta modulator and is attached thereto.
4. disconnector state testing device according to claim 1, is characterized in that, described single-chip microcomputer is MSP430 series monolithic.
5. disconnector state testing device according to claim 1, is characterized in that, described connecting communication modular converter is RS232-USB interface convertor.
6. disconnector state testing device according to claim 1, is characterized in that, also comprise LCD display module, and LCD display module connects described single-chip microcomputer.
7. disconnector state testing device according to claim 6, is characterized in that, described LCD display module is segment liquid crystal screen.
8. disconnector state testing device according to claim 1, is characterized in that, also comprise storage unit, and storage unit connects described single-chip microcomputer.
9. disconnector state testing device according to claim 8, is characterized in that, described storage unit is EEPROM storage chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521021309.5U CN205228803U (en) | 2015-12-10 | 2015-12-10 | Isolator state test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521021309.5U CN205228803U (en) | 2015-12-10 | 2015-12-10 | Isolator state test device |
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| CN205228803U true CN205228803U (en) | 2016-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490991A (en) * | 2017-09-13 | 2017-12-19 | 广西电网有限责任公司电力科学研究院 | A kind of isolator operating mechanism intelligence control system |
| CN108051190A (en) * | 2017-11-30 | 2018-05-18 | 国网江苏省电力有限公司检修分公司 | Disconnecting switch operating mechanism state analysis method based on main-shaft torque corner characteristic |
| CN110554308A (en) * | 2019-09-02 | 2019-12-10 | 云南电网有限责任公司昆明供电局 | Characteristic analyzer for electric operating mechanism of isolating switch |
| CN113899482A (en) * | 2021-09-30 | 2022-01-07 | 国网江苏省电力有限公司检修分公司 | Isolating switch main shaft torque measuring sensor and jamming defect detection method |
| CN115061448A (en) * | 2022-05-11 | 2022-09-16 | 中国第一汽车股份有限公司 | Whole vehicle static current testing method under rain working condition |
-
2015
- 2015-12-10 CN CN201521021309.5U patent/CN205228803U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490991A (en) * | 2017-09-13 | 2017-12-19 | 广西电网有限责任公司电力科学研究院 | A kind of isolator operating mechanism intelligence control system |
| CN108051190A (en) * | 2017-11-30 | 2018-05-18 | 国网江苏省电力有限公司检修分公司 | Disconnecting switch operating mechanism state analysis method based on main-shaft torque corner characteristic |
| CN108051190B (en) * | 2017-11-30 | 2020-03-10 | 国网江苏省电力有限公司检修分公司 | Method for analyzing state of disconnecting switch control mechanism based on main shaft torque corner characteristics |
| CN110554308A (en) * | 2019-09-02 | 2019-12-10 | 云南电网有限责任公司昆明供电局 | Characteristic analyzer for electric operating mechanism of isolating switch |
| CN113899482A (en) * | 2021-09-30 | 2022-01-07 | 国网江苏省电力有限公司检修分公司 | Isolating switch main shaft torque measuring sensor and jamming defect detection method |
| CN115061448A (en) * | 2022-05-11 | 2022-09-16 | 中国第一汽车股份有限公司 | Whole vehicle static current testing method under rain working condition |
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