CN107643448A - Megger test detection means and detection method - Google Patents
Megger test detection means and detection method Download PDFInfo
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- CN107643448A CN107643448A CN201711013710.8A CN201711013710A CN107643448A CN 107643448 A CN107643448 A CN 107643448A CN 201711013710 A CN201711013710 A CN 201711013710A CN 107643448 A CN107643448 A CN 107643448A
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- 238000012360 testing method Methods 0.000 title claims abstract description 220
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 58
- 238000009434 installation Methods 0.000 claims abstract description 37
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- 238000000034 method Methods 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 23
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Abstract
The invention belongs to the technical field of insulaion resistance detection, in order to solve the technical problem that megger test efficiency is low present in prior art, there is provided the megger test detection means and detection method of a kind of megger test；Described device includes being detected insulaion resistance installation portion, is arranged to multiple detected insulaion resistances being arranged on inside it in parallel；Insulation Resistance Tester, it is connected with the detected insulaion resistance installation portion, and multiple detected insulaion resistances of the detected insulaion resistance installation portion internal parallel installation can be detected simultaneously；Controller, it is arranged to send the working signal for starting test to the Insulation Resistance Tester, and receives the test result of the multiple detected insulaion resistance；Man-machine interaction unit, it is arranged to input the working signal for starting and testing, and shows the test result of the Insulation Resistance Tester.
Description
Technical field
The present invention relates to insulaion resistance detection technical field, more particularly to a kind of megger test detection means and
Detection method.
Background technology
Carry out CGI goods and materials (such as：Air switch) all it is to apply insulation resistance meter at present during megger test
Megger test item by item is carried out to single air switch：Make input terminal whole short circuit, lead-out terminal complete firstly the need of wiring
Portion's short circuit, air switch is then turned off, finally carries out the first test item respectively and (insulated between measurement input terminal and lead-out terminal
Performance), the second test item (insulating properties between measurement input terminal and shell), the 3rd test item (measurement lead-out terminal with it is outer
Insulating properties between shell) test, respectively as shown in Fig. 1 (a), Fig. 1 (b), Fig. 1 (c)；And insulaion resistance of the prior art is surveyed
Examination activity typically has manually to complete, without more efficient means of testing or method.
According to insulation resistance test specification in GB/T24343-2009 Electrical equipment of industrial machines, each Insulation test time
1min is all no less than, along with needing to connect and dismantle substantial amounts of shorting stub in test process, therefore is accomplished manually single quilt
Three megger tests work of measurement equipment at least needs 6min, due to CGI goods and materials species, Numerous, takes pure at present
Artificial means of testing, taking can be especially very long, and causes artificial fatigue to have a strong impact on test quality over time, once
When facing the nervous test job of arduous task, duration, it can also influence to detect the deadline.
Therefore, as insulaion resistance demand increases, especially also need to complete substantial amounts of insulaion resistance in a short time
Whether qualified judgement；Those skilled in the art are there is an urgent need to a kind of quick, efficient means of testing, to complete to a large amount of exhausted
The detection of edge resistance.
The content of the invention
In order to solve the technical problem that megger test efficiency is low present in prior art, the purpose of the present invention is to carry
For a kind of megger test detection means and detection method that can simultaneously, efficiently complete multiple megger tests.
To achieve these goals, technical scheme provided by the invention includes：
One aspect of the present invention provides a kind of megger test detection means, it is characterised in that including：
Insulaion resistance installation portion is detected, is arranged to multiple detected insulaion resistances being arranged in it in parallel
Portion；
Insulation Resistance Tester, it is connected with the detected insulaion resistance installation portion, and the quilt can be detected simultaneously
Detect multiple detected insulaion resistances of insulaion resistance installation portion internal parallel installation；
Controller, it is arranged to send the working signal for starting test to the Insulation Resistance Tester, and described in reception
The test result of multiple detected insulaion resistances；
Man-machine interaction unit, it is arranged to input the working signal for starting and testing, and shows the insulaion resistance
The test result of tester.
Preferably, described device also includes multiple positioned at the Insulation Resistance Tester and described tested the embodiment of the present invention
The controlling switch surveyed between insulaion resistance installation portion, the controller can also send to the controlling switch and open or close
Control signal.
The embodiment of the present invention it is further preferred that the controlling switch is relay, and with the detected insulated electro
Each detected insulaion resistance is connected with three relays in resistance installation portion；And connect when with each detected insulaion resistance
Connect when the first relay turns on, test insulating properties between insulaion resistance input terminal and lead-out terminal；When with each quilt
Detect insulaion resistance connection when the second relay turn on, test insulaion resistance input terminal and shell between insulating properties；
, when the 3rd relay turns on, tested when with each detected insulaion resistance connection between insulaion resistance lead-out terminal and shell
Insulating properties.
The embodiment of the present invention it is further preferred that the controlling switch is relay, and with the detected insulated electro
Each detected insulaion resistance is connected with three relays in resistance installation portion；When first be connected with each detected insulaion resistance
When relay and the second relay turn on, insulating properties between insulaion resistance input terminal and lead-out terminal are tested；When with it is each
Be detected the first relay of insulaion resistance connection and when the 3rd relay turns on, test insulaion resistance input terminal and shell it
Between insulating properties；When the second relay and the 3rd relay with each detected insulaion resistance connection turn on, test insulation
Insulating properties between resistance lead-out terminal and shell.
Preferably, the controller includes AT89C51 single-chip microcomputers, the AT89C51 single-chip microcomputers and institute to the embodiment of the present invention
State Insulation Resistance Tester and communication signal is exchanged by serial RS232-C communications protocol.
Preferably, the man-machine interaction unit is provided with multiple sound and light alarm modules to the embodiment of the present invention, when the multiple
Have in the test result of tested insulaion resistance in parallel when testing different signals, with testing not by the corresponding acousto-optic report of signal
Alert module alarm and/or bright light.
Another aspect of the present invention also provides a kind of megger test detection method, it is characterised in that including：
S1, the enabling signal for starting test is sent to Insulation Resistance Tester；
S2, Insulation Resistance Tester apply to the detected insulaion resistance installation portion for being provided with multiple detected insulaion resistances
Detection signal；
S3, the test result for receiving by Insulation Resistance Tester multiple detected insulaion resistances, and the test is tied
Fruit shows.
The embodiment of the present invention is it is further preferred that methods described also includes：It is located at the Insulation Resistance Tester to multiple
Controlling switch between the detected insulaion resistance installation portion sends the enabling signal opened or closed.
The embodiment of the present invention it is further preferred that the controlling switch is relay, and with the detected insulated electro
Each detected insulaion resistance is connected with three relays in resistance installation portion；And when to each detected insulaion resistance
Connection when the first relay sends Continuity signal, test insulating properties between insulaion resistance input terminal and lead-out terminal；
When to be connected with each detected insulaion resistance when the second relay send Continuity signal when, test insulaion resistance input terminal
The insulating properties between shell；When to be connected with each detected insulaion resistance when the 3rd relay send Continuity signal when,
Test insulating properties between insulaion resistance lead-out terminal and shell.
Preferably, the controlling switch is relay to further embodiment of the present invention, and with the detected insulated electro
Each detected insulaion resistance is connected with three relays in resistance installation portion；When to be connected with each detected insulaion resistance
When one relay and the second relay send Continuity signal, insulating properties between insulaion resistance input terminal and lead-out terminal is tested
Energy；When sending Continuity signal to the first relay being connected with each detected insulaion resistance and the 3rd relay, test is exhausted
Insulating properties between edge resistance input terminal and shell；When to the second relay being connected with each detected insulaion resistance and
When three relays send conducting, insulating properties between insulaion resistance lead-out terminal and shell are tested.
The embodiment of the present invention preferably, the enabling signal is sent in methods described by AT89C51 single-chip microcomputers；And institute
State AT89C51 single-chip microcomputers and communication signal is exchanged by serial RS232-C communications protocol with the Insulation Resistance Tester.
Preferably, methods described also includes the embodiment of the present invention：When the test result of first time test shows wrong,
First stage is divided into using binary search algorithm and second stage continues to testing.
The above-mentioned technical proposal provided using present patent application, can obtain one kind in following beneficial effect：
1st, Insulation Resistance Tester being controlled by controller so that multiple tested insulaion resistances in parallel are detected simultaneously,
Greatly speed up testing efficiency.
2nd, by the switch of controller control relay, the automatic switchover to insulaion resistance state verification is realized, avoids hand
Dynamic wiring wastes the excessive time.
3rd, test not by when, tested again using binary search algorithm, can relative to testing one by one
More rapidly find underproof insulaion resistance.
The further feature and advantage of invention will illustrate in the following description, also, partly become aobvious from specification
And be clear to, or understood by implementing technical scheme.The purpose of the present invention and other advantages can be by illustrating
Specifically noted structure and/or flow are realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 (a), Fig. 1 (b), the schematic diagram that Fig. 1 (c) is megger test line of the prior art.
Fig. 2 is a kind of structured flowchart of megger test detection means provided in an embodiment of the present invention.
Fig. 3 is a kind of circuit diagram of megger test detection means provided in an embodiment of the present invention.
Fig. 4 is a kind of circuit diagram for megger test detection means that another embodiment of the present invention provides.
A kind of Fig. 5 flow charts of megger test detection method provided in an embodiment of the present invention.
Fig. 6 is a kind of flow chart for megger test detection method that another embodiment of the present invention provides.
Embodiment
Embodiments of the present invention are described in detail below with reference to drawings and Examples, and how the present invention is applied whereby
Technological means solves technical problem, and the implementation process for reaching technique effect can fully understand and implement according to this.Need to illustrate
, these specific descriptions are to allow those of ordinary skill in the art to be more prone to, clearly understand the present invention, rather than to this hair
Bright limited explanation；And if conflict is not formed, each embodiment in the present invention and each spy in each embodiment
Sign can be combined with each other, and the technical scheme formed is within protection scope of the present invention.
In addition, can be in the control system of a such as group controller executable instruction the flow of accompanying drawing illustrates the step of
Middle execution, although also, show logical order in flow charts, in some cases, can be with different from herein
Order performs shown or described step.
Below by the drawings and specific embodiments, technical scheme is described in detail：
Embodiment
As shown in Fig. 2 the present embodiment provides a kind of megger test detection means, the device includes：
Insulaion resistance installation portion is detected, is arranged to multiple detected insulaion resistances 110,120,130 with the side of parallel connection
Formula is arranged on inside it；Preferably, 10 detected insulaion resistances of receiving that insulaion resistance installation portion can be in parallel are detected, and
Tested insulaion resistance is the insulaion resistance of air switch.
Insulation Resistance Tester 400, it is connected with detected insulaion resistance installation portion, and can simultaneously detects and be detected absolutely
Multiple detected insulaion resistances of edge resistance installation portion internal parallel installation；Insulation Resistance Tester (can refer to not by base to CGI
This part design and manufacture, influenceing structure, system, part or the part of security function) goods and materials carry out megger test and set
It is standby, such as model HIOKI ST5520 Insulation Resistance Tester.
Controller 200, it is arranged to send the working signal for starting test to Insulation Resistance Tester 400, and receives more
The test result of individual detected insulaion resistance；Preferably, controller 200 includes as transmission control instruction, receives feedback result
And the single-chip microcomputer of appropriate logical operation is carried out, should for example with the single-chip microcomputer of the AT89C51 models of atmel corp's production
8 single-chip microcomputers of CMOS of model high performance-price ratio, piece include 4k bytes can sassafras is write repeatedly read-only program memory and
128bytes random access data storage, 32 programmable I/O mouths, 2 16 bit timings/counters, 6 interrupt sources can
Program serial UART passages, compatible MCS-51 instruction set supports C language programming, technology maturation, stably, and easy to get started, completely full
The exploitation demand of sufficient lightweight industrial control system；And consider that HIOKIST5520 Insulation Resistance Tester supports RS232-C
Communications protocol, serial ports remote control function is opened, therefore realized using single-chip microcomputer by RS232-C communications protocol to insulation
Resistance meter remote control.
Man-machine interaction unit 300, it is arranged to input and starts the working signal of test, and shows Insulation Resistance Tester
Test result.
The present embodiment preferably, megger test with detection means also include it is multiple positioned at Insulation Resistance Tester and by
The controlling switch between insulaion resistance installation portion is detected, controller can also send the control opened or closed to controlling switch
Signal.It is further preferred that controlling switch is relay, and insulation is detected with each in detected insulaion resistance installation portion
Resistance is connected with three relays；And, when the first relay turns on, tested when with each detected insulaion resistance connection
Insulating properties between insulaion resistance input terminal and lead-out terminal；When what is be connected with each detected insulaion resistance works as the first relay
When device turns on, insulating properties between insulaion resistance input terminal and shell are tested；When what is be connected with each detected insulaion resistance
When the first relay turns on, insulating properties between insulaion resistance lead-out terminal and shell are tested.
Specifically, as shown in Figure 3, Figure 4, the test device that the present embodiment provides uses AT89C51 SCM system conducts
Micro-control unit, by the break-make of 10 10 groups of GPIO pins parallel control (every group 3) solid-state relay, every group of solid-state relay
The output end of (every group 3) concatenates a tested insulaion resistance and forms TCH test channel all the way；And it is divided into three times, needs every time
One in a group relay is wanted to open；Preferably, when what is be connected with each detected insulaion resistance works as (every group of the first relay
In first relay) conducting when, test insulating properties between insulaion resistance input terminal and lead-out terminal；When with each quilt
Detect insulaion resistance connection when the second relay (second relay in every group) turns on, test insulaion resistance input
Insulating properties between son and shell；When what is be connected with each detected insulaion resistance works as (the 3rd in every group, the 3rd relay
Relay) conducting when, test insulating properties between insulaion resistance lead-out terminal and shell；Each totally 10 road TCH test channel, 10 tunnels
TCH test channel takes parallel way to connect with ST5520 type Insulation Resistance Tester positive-negative polarity binding posts, and AT89C51 passes through RS-
232C and ST5520 realizes serial communication, and test can be sent to ST5520 and instructs and receives test result, according to what is received
Test result sends control instruction automatically using optimized algorithm, once can 10 tested megger test works of fast automatic completion
Make.When need to switch different state verifications (for example, insulating properties between test insulaion resistance input terminal and lead-out terminal,
Insulating properties between insulaion resistance input terminal and shell are tested, test insulating properties between insulaion resistance lead-out terminal and shell
Can), such as shown in Fig. 4, when all relays 1 turn on, it is possible to it is defeated to complete insulaion resistance in 10 tested insulaion resistances
Whether qualified enter insulating properties between terminal and lead-out terminal；When all relays 2 turn on, it is possible to complete 10 and be tested
Whether insulating properties are qualified between insulaion resistance input terminal and shell in insulaion resistance；When all relays 3 turn on, just
Can complete in 10 tested insulaion resistances whether insulating properties are qualified between test insulaion resistance lead-out terminal and shell；Can be with
Realize that different conditions detection is automatically switched, without manual switching line.Testing efficiency is largely increased, especially carrying out greatly
During the megger test work of batch goods and materials, advantage is more notable.
As shown in figure 3, man-machine interaction unit is provided with multiple sound and light alarm modules, when multiple tested insulaion resistances in parallel
Test result in have when testing different signals, with testing not by the corresponding sound and light alarm module alarm of signal and/or bright
Lamp.More specifically, often complete one group of test (such as final test of 10 tested insulaion resistances), all sound light alarm, buzzing
Device sounding, indicator lamp are lighted, and respective channel indicator lamp, which is lighted, represents the lane testing by the way that non-lit up expression lane testing is not
Pass through；The function is controlled respectively by 0~7 pin of AT89C51P0 mouths and 6~7 pins of P2 mouths；Tester passes through button
Send hard break and carry out next group of test activity to AT89C51, notice AT89C51.
Preferably, above-mentioned controlling switch is relay to the present embodiment, and with it is each in detected insulaion resistance installation portion
Detected insulaion resistance is connected with three relays；But have the scheme of choosing as another kind, when with each detected insulated electro
When hindering the first relay and the conducting of the second relay of connection, insulating properties between insulaion resistance input terminal and lead-out terminal is tested
Energy；When the first relay and the 3rd relay with each detected insulaion resistance connection turn on, test insulaion resistance input
Insulating properties between terminal and shell；When the second relay and the 3rd relay with each detected insulaion resistance connection turn on
When, test insulating properties between insulaion resistance lead-out terminal and shell.Such case, it is similar by Fig. 1 (a), Fig. 1 (b), Fig. 1 (c)
In insulation resistance meter be substituted for " Insulation Resistance Tester ", and Insulation Resistance Tester and tested insulaion resistance (air switch)
In the road for forming different connections, the first relay is connected with one end (input) branch road, in the other end (output end) branch road
The second relay is connected with, the 3rd relay is connected with the road of earth terminal.It is further preferred that controller includes
AT89C51 single-chip microcomputers, AT89C51 single-chip microcomputers exchange communication letter with Insulation Resistance Tester by serial RS232-C communications protocol
Number.
Preferably, controller is provided with time block to the present embodiment, and passes through time block so that controller is from hair
After sending the working signal for starting and testing, after the scheduled time, just start to receive the test result of Insulation Resistance Tester.
Preferably, every time after test, after the scheduled time, each tested insulaion resistance both ends no longer produce survey to the present embodiment
Voltage is tried, the I/O pin of TCH test channel corresponding with each tested insulaion resistance is written as 0, exports and is changed into low level, and and relay
The output of device is in high-impedance state.
More specifically, using technical scheme as shown in Figure 3 and Figure 4, its design principle is：
1st, output control process：Using 0~1 pin of 0~7 pin of AT89C51P1 mouths, and P2 mouths, it is configured to defeated
Outlet (internal band pull-up resistor), the input B of input A, GND the connection solid-state relay of solid-state relay, solid-state are connected respectively
The output C of relay connects the positive polarity binding post of Insulation Resistance Tester, and the output D of solid-state relay connects tested insulaion resistance
Test point 1, the test point 2 of tested insulaion resistance connect the negative polarity binding post of Insulation Resistance Tester, and such I/O pin can control
The on off operating mode of 10 groups of solid-state relays, 10 groups of solid-state relays take parallel way to be linked into insulation together with tested insulaion resistance
The positive and negative both ends of resistance meter.
Initialization：Each I/O pin is initialized as 0, exports low level, and the output of relay is high-impedance state, each insulation
Resistance test loop is off；
Every time before test：The I/O pin for setting respective channel by test request is written as 1, exports high level, relay it is defeated
It is logical to go out termination, now arrives Insulation Resistance Tester, Insulation Resistance Tester positive and negative two because single-chip microcomputer not yet sends test instruction
End is without test voltage；
Every time in test：The I/O pin of corresponding TCH test channel is written as 1, and output remains high level, the output end of relay
Connect, single-chip microcomputer sends test instruction and arrives Insulation Resistance Tester, and the positive and negative both ends of Insulation Resistance Tester produce test voltage, shape
Into test loop；
Every time after test：After test reaches setting time (1min), the positive and negative both ends of Insulation Resistance Tester no longer produce survey
Voltage is tried, the I/O pin for now corresponding to TCH test channel is written as 0, and output is changed into low level, and the output of relay is in high resistant shape
State.
2nd, communication mechanism：It is open because HIOKI ST5520 types Insulation Resistance Tester supports RS232-C communications protocol
Serial ports remote control function, therefore its remote control is possibly realized using chip microcontroller.
(ST5520 remote control application programs, can by the ST5520Sample Application provided by using HIOKI
Send and instruct and receive feedback) coordinate COM Debug Assistant instrument, found through test of many times, ST5520 remote control application programs
Using frame as communication units between ST5520, the definition of frame uses fixed length packet form, has 8 bytes per frame.It is divided into according to function：
Send frame and receiving frame, frame format are specific as follows：
1), frame format：Start byte+frame ordering+content frame+verification.
2), start byte：0XFF.
3), frame ordering：The function (1 byte) of the frame.
4), content frame：The content (3 bytes) of frame.
5), verify：The verification of all bytes of start byte, total bytes, frame ordering, content frame and.
6), other are related：
Baud rate：9600bps；
Byte format：1+8 data bit of the start bit+stop bits of no parity check position+1；
Logic level：RS232-C.
Therefore, it can design and sent and reception dedicated for AT89C51 serial communications according to ST5520 communication frame format
Function or subprogram, for parsing communication data and organizing bag communication data, control instruction is sent to ST5520, for example send test
Sign on, upper lower limit value (being used for result judgement) that comparator is set etc., and ST5520 test result output can be received,
Such as test result numerical value, result of determination (PASS U.FAIL L.FAIL) etc..
In test process, AT89C51 timer is also used, to timing less than 1min, is slightly less than ST5520 survey
Try the time, within the time less than 1min, AT89C51 be in delay wait time, between AT89C51 and ST5520 without
Communication, until mono- test process of ST5520 closes to an end, this design can effectively reduce Communication processing process to single-chip microcomputer system
Pressure caused by Memory Load of uniting.
3rd, control logic：In Embedded Software Design is carried out, optimized algorithm should be used, to realize optimal, most fast survey
Examination strategy.
A), test for the first time, be tested insulaion resistance parallel connection using 10 tunnels measures simultaneously, and output result is more than or equal to single quilt
Survey insulaion resistance insulaion resistance 1/10 when (tolerance limit by that analogy, should be set during actual test, by setting ST5520 to compare
The upper lower limit value of device is realized), you can judge that insulaion resistance is qualified, test can be completed in first time for most CGI goods and materials
Test.
B), second of test, for the situation of first time test feeding back unsuccessful (unqualified), now binary search is taken to calculate
Method is divided into first stage and second stage test, and the first stage is that the tested insulaion resistance in preceding 5 road is in parallel to be measured simultaneously, second stage
Insulaion resistance parallel connection is tested for rear 5 tunnel to measure simultaneously, wherein also implying the redundancy of " either-or ", should be filtered out this superfluous
It is remaining, citing：Known first time tests the test in parallel of 10 tunnels not by opening second and testing, the test in parallel of 5 tunnels is logical before discovery
Cross, then the test in parallel of rear 5 tunnel is then without re-test, and the test in parallel of 5 tunnels is not by opening directly after can determine that without test
Third time is tested；
C), third time is tested, and FAIL situation is fed back for second of test, is now divided into first stage and second-order again
Section test, the first stage is that the tested insulaion resistance in preceding 3 road in 5 paths is in parallel to be measured simultaneously, and second stage is rear 5 paths
In rear 2 tunnel be tested that insulaion resistance is in parallel to be measured simultaneously, filter out the redundancy of " either-or "；
D) the 4th time, the 5th inferior test, are continued on, until obtaining the test mode of all passages.
In actual test, it is very rare to reach the situation of above testing time three times, but is covered to reach highest test
Lid rate, it is necessary to carry out above-mentioned design, and do not interfere with testing efficiency actually because occur multiple test not by,
Declare that the inspection of this batch of GCI goods and materials does not pass through.
It should be noted that the present embodiment preferably provides model HIOKI ST5520 Insulation Resistance Tester；
Those skilled in the art expect, can also set multiple Insulation Resistance Testers while test multigroup tested insulaion resistance；These
Belong to the protection domain of the application.
As shown in figure 5, the present embodiment also provides a kind of megger test detection method, this method includes：
S1, the enabling signal for starting test is sent to Insulation Resistance Tester；
S2, Insulation Resistance Tester apply to the detected insulaion resistance installation portion for being provided with multiple detected insulaion resistances
Detection signal；
S3, the test result for receiving by Insulation Resistance Tester multiple detected insulaion resistances, and test result is shown
Show to come.
The embodiment of the present invention is it is further preferred that the above method also includes：To it is multiple positioned at Insulation Resistance Tester and by
The controlling switch detected between insulaion resistance installation portion sends the enabling signal opened or closed.
For the present embodiment it is further preferred that in the above method, controlling switch is relay, and with detected insulaion resistance
Each detected insulaion resistance is connected with three relays in installation portion；And when to being connected with each detected insulaion resistance
When the first relay sends Continuity signal, insulating properties between insulaion resistance input terminal and lead-out terminal are tested；When to
Each detected insulaion resistance connection when the second relay sends Continuity signal, test insulaion resistance input terminal and shell
Between insulating properties；When to being connected with each detected insulaion resistance when the 3rd relay sends Continuity signal, test is exhausted
Insulating properties between edge resistance lead-out terminal and shell.
Preferably, in the above method, controlling switch is relay to this further embodiment, and with detected insulaion resistance
Each detected insulaion resistance is connected with three relays in installation portion；When to first be connected with each detected insulaion resistance
When relay and the second relay send Continuity signal, insulating properties between insulaion resistance input terminal and lead-out terminal are tested；
When sending Continuity signal to the first relay being connected with each detected insulaion resistance and the 3rd relay, insulated electro is tested
Hinder insulating properties between input terminal and shell；When to the second relay being connected with each detected insulaion resistance and the 3rd after
When electrical equipment sends conducting, insulating properties between insulaion resistance lead-out terminal and shell are tested.
The present embodiment preferably, enabling signal is sent in method by AT89C51 single-chip microcomputers；And AT89C51 single-chip microcomputers
Communication signal is exchanged by serial RS232-C communications protocol with Insulation Resistance Tester.
As shown in fig. 6, another embodiment of the application is it is further preferred that the above method also includes：When first time test
When test result shows wrong, the first stage is divided into using binary search algorithm and second stage continues to testing.
The megger test detection method expansion provided with reference to Fig. 2-Fig. 6 the present embodiment is further retouched
State：
1) one group (10 tested insulaion resistances) test, is automatically performed by SCM system control Insulation Resistance Tester,
Insulation Resistance Tester is by RS232-C serial line interface feedback test results to SCM system, the instruction of 10 paths indicator lamps
The final result of every group of test, while pronounce to remind tester's test completion, device to be in non-test state by buzzer, can
Tested insulaion resistance is changed to carry out next group of test；
2), every group of test is composed in parallel by 10 tested insulaion resistances, is automatically controlled by SCM system and is completed following surveys
Examination process：
A), test for the first time can apply test voltage simultaneously to 10 tested insulaion resistances and test, and insulaion resistance is surveyed
If instrument feedback test is tried by the way that the group test terminates, and indicator lamp is lighted, and buzzer sends test and completes prompt tone；
If feedback test b), is tested for the first time not by carrying out second and testing, be divided into first stage, second-order
Section test, first stage refer to preceding 5 paths while apply test voltage and test, as feedback test if in buffering area
The test result of 5 paths before record；Second stage refers to rear 5 paths while applies test voltage and test, and such as feeds back
Test passes through the test result of then 5 paths after buffer records；
If c), first stage and second stage have the unsanctioned situation of feedback test in second of test, carry out
Third time is tested, and is divided into first stage, second stage test, and the first stage refers to 3 paths before 5 paths while applies survey
Examination voltage is tested, such as the test result of feedback test 3 paths before buffer records if；Second stage refers to 5
2 paths apply test voltage and tested simultaneously after paths, such as feedback test if 2 paths after buffer records
Test result；
If first stage and second stage have the unsanctioned situation of feedback test during d), third time is tested, carry out
4th test, continue to be divided into first stage, second stage test, etc.；
E), until 10 paths are fully completed test, final testing result is fed back：Pronounce to remind tester by buzzer
Test is completed, device is in non-test state, and replaceable tested insulaion resistance is to carry out next group of test.In fact, this warp
The test scene for crossing multiple binary search is in theory impossible existing, means to deposit by multiple binary search
In the unqualified of multiple tested insulaion resistances, the unqualified of multiple tested insulaion resistances declares that batch goods and materials inspection is obstructed
Cross, it is no to continue the necessary of re-test.
3) next group of test, is carried out：First confirm that the wiring of tested insulaion resistance is intact, reliable, be then manually pressed by by
Key, SCM system detect external interrupt, into interrupt handling routine, call one group of complete test control program, complete
The group is tested.
The above-mentioned technical proposal provided using present patent application, can obtain one kind in following beneficial effect：
1st, Insulation Resistance Tester being controlled by controller so that multiple tested insulaion resistances in parallel are detected simultaneously,
Greatly speed up testing efficiency.
2nd, by the switch of controller control relay, the automatic switchover to insulaion resistance state verification is realized, avoids hand
Dynamic wiring wastes the excessive time.
3rd, test not by when, tested again using binary search algorithm, can relative to testing one by one
More rapidly find underproof insulaion resistance.
4th, every time after test, after the scheduled time, each tested insulaion resistance both ends no longer produce test voltage, that is, control
The state that device waits in delay within a predetermined period of time, is not communicated with tested insulaion resistance, is reached until the scheduled time
(tested megger test process closes to an end)；Communication processing process so can effectively be reduced to the corresponding control system of controller
Pressure caused by Memory Load of uniting.
Finally it should be noted that described above is only highly preferred embodiment of the present invention, not the present invention is appointed
What formal limitation.Any those skilled in the art, it is without departing from the scope of the present invention, all available
The way and technology contents of the disclosure above make many possible variations and simple replacement etc. to technical solution of the present invention, these
Belong to the scope of technical solution of the present invention protection.
Claims (10)
- A kind of 1. megger test detection means, it is characterised in that including：Insulaion resistance installation portion is detected, is arranged to multiple detected insulaion resistances being arranged on inside it in parallel；Insulation Resistance Tester, it is connected with the detected insulaion resistance installation portion, and described be detected can be detected simultaneously Multiple detected insulaion resistances of insulaion resistance installation portion internal parallel installation；Controller, it is arranged to send the working signal for starting test to the Insulation Resistance Tester, and receives the multiple It is detected the test result of insulaion resistance；Man-machine interaction unit, it is arranged to input the working signal for starting and testing, and shows the megger test The test result of instrument.
- 2. device according to claim 1, it is characterised in that described device also includes multiple positioned at insulaion resistance survey The controlling switch between instrument and the detected insulaion resistance installation portion is tried, the controller can also be sent out to the controlling switch Send the control signal opened or closed.
- 3. according to device according to claim 2, it is characterised in that the controlling switch is relay, and with it is described It is detected in insulaion resistance installation portion each detected insulaion resistance and is connected with three relays；And it is detected when with each Survey insulaion resistance connection when the first relay turn on, test insulaion resistance input terminal and lead-out terminal between insulating properties Energy；When with each detected insulaion resistance connection when the second relay turn on, test insulaion resistance input terminal and shell Between insulating properties；When, when the 3rd relay turns on, test insulaion resistance exports with each detected insulaion resistance connection Insulating properties between terminal and shell.
- 4. device according to claim 2, it is characterised in that the controlling switch is relay, and is detected with described Survey each detected insulaion resistance in insulaion resistance installation portion and be connected with three relays；Connect when with each detected insulaion resistance When the first relay connect and the second relay turn on, insulating properties between insulaion resistance input terminal and lead-out terminal are tested； When the first relay and the 3rd relay with each detected insulaion resistance connection turn on, insulaion resistance input terminal is tested The insulating properties between shell；When the second relay and the 3rd relay with each detected insulaion resistance connection turn on, Test insulating properties between insulaion resistance lead-out terminal and shell.
- 5. according to devices of the claim 1-4 described in any one, it is characterised in that the controller includes AT89C51 monolithics Machine, the AT89C51 single-chip microcomputers exchange communication signal with the Insulation Resistance Tester by serial RS232-C communications protocol.
- 6. according to devices of the claim 1-4 described in any one, it is characterised in that the man-machine interaction unit is provided with multiple Sound and light alarm module, when have in the test result of the multiple tested insulaion resistance in parallel test different signals when, with survey Examination does not pass through sound and light alarm module alarm and/or bright light corresponding to signal.
- A kind of 7. megger test detection method, it is characterised in that including：S1, the enabling signal for starting test is sent to Insulation Resistance Tester；S2, Insulation Resistance Tester apply detection to the detected insulaion resistance installation portion for being provided with multiple detected insulaion resistances Signal；S3, the test result for receiving by Insulation Resistance Tester multiple detected insulaion resistances, and the test result is shown Show to come.
- 8. according to the method for claim 7, it is characterised in that methods described also includes：It is located at the insulated electro to multiple The controlling switch hindered between tester and the detected insulaion resistance installation portion sends the enabling signal opened or closed.
- 9. according to the method for claim 8, it is characterised in that the controlling switch is relay, and is detected with described Survey each detected insulaion resistance in insulaion resistance installation portion and be connected with three relays；AndWhen to being connected with each detected insulaion resistance when the first relay sends Continuity signal, test insulaion resistance inputs Insulating properties between terminal and lead-out terminal；Turned on when to the first relay transmission of working as being connected with each detected insulaion resistance During signal, insulating properties between insulaion resistance input terminal and shell are tested；When to being connected with each detected insulaion resistance When the first relay sends Continuity signal, insulating properties between insulaion resistance lead-out terminal and shell are tested；OrWhen sending Continuity signal to the first relay being connected with each detected insulaion resistance and the second relay, test is exhausted Insulating properties between edge resistance input terminal and lead-out terminal；When to the first relay being connected with each detected insulaion resistance When sending Continuity signal with the 3rd relay, insulating properties between insulaion resistance input terminal and shell are tested；When to it is each Be detected the second relay of insulaion resistance connection and when the 3rd relay sends conducting, test insulaion resistance lead-out terminal with it is outer Insulating properties between shell.
- 10. according to the method described in any one in claim 7-9, it is characterised in that methods described also includes：When for the first time When the test result of test shows wrong, the first stage is divided into using binary search algorithm and second stage continues to surveying Examination.
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| CN110333392A (en) * | 2019-06-18 | 2019-10-15 | 重庆市轨道交通（集团）有限公司 | Controller detection device |
| CN110376491A (en) * | 2019-07-12 | 2019-10-25 | 中国铁路北京局集团有限公司北京车辆段 | A kind of wiring systems insulation detecting method, device and insulation instrument |
| CN110794294A (en) * | 2019-11-02 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Device and method for detecting simulation action of double-float gas relay of 220kV transformer |
| CN112556921A (en) * | 2020-11-09 | 2021-03-26 | 季华实验室 | Vacuum detection device for multi-joint and vacuum detection method for film gauge |
| CN113917298A (en) * | 2021-11-25 | 2022-01-11 | 中国南方电网有限责任公司超高压输电公司百色局 | Multi-cable core insulation test method and switching device |
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| CN109765430A (en) * | 2019-03-26 | 2019-05-17 | 北京经纬恒润科技有限公司 | A kind of insulation impedance detection system and detection method |
| CN109765430B (en) * | 2019-03-26 | 2021-06-29 | 北京经纬恒润科技股份有限公司 | Insulation impedance detection system and detection method |
| CN110333392A (en) * | 2019-06-18 | 2019-10-15 | 重庆市轨道交通（集团）有限公司 | Controller detection device |
| CN110333392B (en) * | 2019-06-18 | 2021-07-13 | 重庆市轨道交通（集团）有限公司 | Driver controller detection device |
| CN110376491A (en) * | 2019-07-12 | 2019-10-25 | 中国铁路北京局集团有限公司北京车辆段 | A kind of wiring systems insulation detecting method, device and insulation instrument |
| CN110794294A (en) * | 2019-11-02 | 2020-02-14 | 国网辽宁省电力有限公司电力科学研究院 | Device and method for detecting simulation action of double-float gas relay of 220kV transformer |
| CN112556921A (en) * | 2020-11-09 | 2021-03-26 | 季华实验室 | Vacuum detection device for multi-joint and vacuum detection method for film gauge |
| CN113917298A (en) * | 2021-11-25 | 2022-01-11 | 中国南方电网有限责任公司超高压输电公司百色局 | Multi-cable core insulation test method and switching device |
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