CN104422859B - Detection device - Google Patents
Detection device Download PDFInfo
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- CN104422859B CN104422859B CN201410397343.6A CN201410397343A CN104422859B CN 104422859 B CN104422859 B CN 104422859B CN 201410397343 A CN201410397343 A CN 201410397343A CN 104422859 B CN104422859 B CN 104422859B
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- wiring graph
- partial discharge
- positive electrode
- detection device
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 238000010892 electric spark Methods 0.000 claims abstract description 55
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 230000008859 change Effects 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 abstract description 40
- 238000012544 monitoring process Methods 0.000 abstract description 36
- 230000003071 parasitic effect Effects 0.000 description 16
- 230000002950 deficient Effects 0.000 description 9
- 230000005611 electricity Effects 0.000 description 9
- 239000000523 sample Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 208000034906 Medical device complication Diseases 0.000 description 1
- 240000001439 Opuntia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention provides the detection device of a kind of electric spark that can detect to occur when Insulation monitoring by being simply formed and partial discharge.The detection device includes：Current source supplies electric current to side of the positive electrode figure, and the side of the positive electrode figure is one in the wiring graph of test object；The electric current of the wiring graph of the test object is flowed through in amperometric determination portion, measurement；And determination unit, the time change of the electric current based on amperometric determination portion measurement determine electric spark or partial discharge whether have occurred in the wiring graph of the test object.
Description
Technical field
The invention mainly relates to the detection devices of circuit substrate.It particularly relates to a kind of for detecting in detection pair
The composition of the electric spark and partial discharge that occur between the wiring graph of elephant.
Background technique
By detecting whether the state of insulation being formed between multiple wiring graphs of circuit substrate (ensures adequately to insulate
Property) come judge the circuit substrate whether be non-defective unit detection device it is known.Pass through one group of wiring graph to test object
Apply fixed voltage and then measures the resistance value between the wiring graph to carry out the detection of state of insulation.
Due to applying voltage to wiring graph in above-mentioned Insulation monitoring, electrical fire can occur between the wiring graph
Flower.When this electric spark occurs, a possibility that certain damage occurs on circuit substrate, is then high.It is therefore preferred that will detect
The middle circuit substrate that electric spark occurs is distinguished as defective products.
It is related to this, patent document 1 disclose it is a kind of detect to the applied voltage waveform of wiring graph decline (when
Preceding voltage compares the position that previous voltage becomes smaller) when, detect the composition that electric spark occurs.According to patent document 1, thus, it is possible to certain
The circuit substrate that electric spark occurs because of Insulation monitoring is prevented to be mixed into.
But recently, the inter-pattern space (pitch) of printed base plate narrows year by year, and in consideration of it, wiring graph when Insulation monitoring
Between there is a situation where partial discharges gradually to increase.Circuit substrate can also damage when partial discharge occurs.It is therefore preferred that
As the circuit substrate that electric spark occurs in detection, also the circuit substrate that partial discharge occurs should be distinguished as defective products.
But when partial discharge, since the electric current flowed between wiring graph is small, it cannot observe as electric spark occurs
When voltage decline.Therefore, the partial discharge occurred when Insulation monitoring cannot be detected by the composition of patent document 1.
Related to this, patent document 2 discloses a kind of by detecting to have occurred generated electromagnetic wave when partial discharge
Carry out the composition of calculating section electric discharge frequency.But since the composition of patent document 2 needs the day for receiving above-mentioned electromagnetic wave
Line etc., therefore there are problems that device complication.
【Existing technical literature】
【Patent document 1】No. 3546046 bulletins of Japanese Patent No.
【Patent document 2】Japanese Patent Publication 2010-32457 bulletin
Summary of the invention
The present invention provides a kind of by the electric spark occurred when being simply formed and can detect that Insulation monitoring and partial discharge
Detection device.
A viewpoint according to the present invention, provides a kind of composition of detection device as follows, to be formed in electricity for detecting
The insulating properties of wiring graph on base board, the detection device include：Current source supplies electric current to side of the positive electrode figure, described
Side of the positive electrode figure is one in the wiring graph of test object；The wiring of the test object is flowed through in amperometric determination portion, measurement
The electric current of figure；And determination unit, the time change of the electric current based on amperometric determination portion measurement determine the test object
Wiring graph in electric spark or partial discharge whether has occurred.
Preferably, in the detection device, the electric current of negative side figure is flowed through in the amperometric determination portion measurement, described
Negative side figure is another in the wiring graph of the test object.
Preferably, composition is performed as follows in the detection device.That is, the detection device includes at the end of being used to measure
Between end time determination part, the end time is after supplying electric current from starting to the side of the positive electrode figure, and the electric current is surveyed
Determine the electric current of the portion's measurement time required until when being less than preset first threshold.The determination unit, at the end of described
Between when exceeding schedule time, electric spark or partial discharge has occurred in judgement.
Preferably, the detection device includes control unit, for supplying electric current from starting to the side of the positive electrode figure
Afterwards, when the electric current of amperometric determination portion measurement is more than the preset restriction time limit in the state of being not less than preset second threshold
When, determine that the insulating properties between the wiring graph of the test object is insufficient.
According to the present invention, when electric spark or partial discharge occurring between the wiring graph of test object, the wiring diagram is flowed through
The time change of the electric current of shape than it is normal when it is slack-off.Therefore, the time change based on the electric current for flowing through wiring graph, can determine that electricity
Whether the generation of spark and partial discharge.
By measuring the electric current of negative side figure, the influence respectively constituted due to being not readily susceptible to side of the positive electrode can be high-precision
Measure to density the electric current for flowing through wiring graph.So as to high precision detect electric spark or partial discharge.
Electric spark occurs between the wiring graph of test object or when partial discharge, flow through the electric current of negative side figure when
Between change it is slack-off and caused by as a result, the electric current until stabilizing needed for time it is elongated.Therefore, as described above, working as
When end time is longer than the stipulated time, it can determine that and electric spark or partial discharge has occurred.
Based on the electric current for flowing through negative side figure, the insulating properties between wiring graph can detect.Therefore, according to the above configuration
Detection device can be used and be commonly constructed (current source, amperometric determination portion etc.) to realize Insulation monitoring, electric spark and partial discharge
Detection, so as to simplify detection device.
Detailed description of the invention
Fig. 1 is the mode circuit figure for showing the detection device overall structure of one implementation form of the present invention.
Fig. 2 is the simplification circuit diagram for showing the state that wiring graph is detected according to detection device.
Fig. 3 is the flow chart of the Insulation monitoring based on detection device.
Fig. 4 A is the chart of the time change of the voltage V of side of the positive electrode figure when showing normal, and Fig. 4 B is when showing normal
The electric current I for flowing through negative side figure time change chart.
Fig. 5 A is the chart for showing the time change of voltage V of side of the positive electrode figure when electric spark occurs, and Fig. 5 B is to show
The chart of the time change of the electric current I for flowing through negative side figure when generation electric spark.
Fig. 6 A is the chart for showing the time change of voltage V of side of the positive electrode figure when partial discharge occurs, and Fig. 6 B is to show
The chart of the time change of the electric current I for flowing through negative side figure when the first portion that sets out discharges.
Fig. 7 A be show charging during after occur partial discharge when side of the positive electrode figure voltage V time change
Chart, Fig. 7 B be show charging during after occur partial discharge when the electric current I for flowing through negative side figure time change
Chart.
[description of symbols]
1：Detection device
11：Constant current source
16：Amperometric determination portion
22：Determination unit
P1：Side of the positive electrode figure
P2：Negative side figure
Specific embodiment
Next, being illustrated with reference to attached drawing to implementation form of the invention.The detection dress of shown in FIG. 1 implementation form
1 is set for judgement whether carrying out bad to the state of insulation the wiring graph for being formed in circuit substrate 2.Although actual
It is formed with the wiring graph of multiple complexity in circuit substrate, but is simplified in Fig. 1, and then shows in 2 shape of circuit substrate
At there are four the states of simple wiring graph P1 to P4.
Detection device 1 includes control unit 10, constant current source 11, voltage determination portion 12, amplitude limiter circuit (Limiter
Circuit) 13, probe 14, switching circuit 15 and amperometric determination portion 16.
Control unit 10 is the computer for including the hardware such as the CPU as arithmetic unit, the ROM as memory storage or RAM.
Also, control unit 10 maintains the softwares such as the program for controlling each portion of detection device 1 in above-mentioned ROM etc..Control unit 10 is logical
The cooperation of above-mentioned hardware and above-mentioned software is crossed to control each portion of detection device 1.
Detection device 1 includes multiple probes 14.Each probe 14 is by the electroconductive component of rodlike or even needle-shaped formation, and energy
It is in contact with any one of wiring graph P1 into P4 on circuit substrate 2.
Constant current source 11 includes positive side terminal and negative side terminal, and is supplied between positive side terminal and negative side terminal
To constant electric current.Also, the negative side terminal of constant current source 11 is grounded.
Amplitude limiter circuit 13 is for protecting the potential difference between the positive side terminal of constant current source 11 and negative side terminal not surpass
Cross fixed upper limit voltage.
Amperometric determination portion 16 includes positive side terminal and negative side terminal, and for detecting from positive side terminal to cathode
The size of the electric current of side terminal flowing.The measurement result in amperometric determination portion 16 is input to control unit 10.Also, amperometric determination portion
16 negative side terminal ground connection.
The state and electricity that switching circuit 15 is used to for each probe 14 being in contact in the positive side terminal with constant current source 11
Flow the state that the positive side terminal of determination part 16 is in contact, the shape not being in contact with constant current source 11 and amperometric determination portion 16
State is arbitrarily switched in state.10 control switch circuit 15 of control unit.
Control unit 10 can make the anode of arbitrary probe 14 and constant current source 11 by suitably controlling switching circuit 15
Side terminal is in contact.Accordingly, the wiring graph contacted to correspondent probe 14 can be supplied to the constant electricity from constant current source 11
Stream.The wiring graph for having supplied the constant current from constant current source 11 is known as " side of the positive electrode figure " in the present specification.
Also, control unit 10 can make the side of the positive electrode of arbitrary probe 14 and amperometric determination portion 16 by suitably controlling switching circuit 15
Terminal is in contact.Accordingly, the electric current flowed in the wiring graph that correspondent probe 14 is contacted can be measured based on amperometric determination portion 16.
The wiring graph that amperometric determination is carried out based on amperometric determination portion 16 is known as " negative side figure " in the present specification.
Voltage determination portion 12 is used to measure the voltage of side of the positive electrode figure.The measurement result in voltage determination portion 12 is input to control
Portion 10 processed.
Here, being more specifically illustrated with reference to Fig. 2.Fig. 2 has been illustrated using one group of wiring graph P1, P2 as detection
The case where object.Fig. 2 is in wiring graph P1, P2 of test object, using a wiring graph P1 as side of the positive electrode figure, and incite somebody to action
Another wiring graph P2 is as negative side figure.Also, in Fig. 2, for convenience of explanation, unnecessary structure is suitably omitted
At diagram.
As shown in Fig. 2, one group of wiring graph P1, P2 have parasitic capacitance C.Therefore, according to constant current source 11 to anode
Side figure P1 supplies constant electric current I0, parasitic capacitance C is enable to charge.As it does so, the voltage V of side of the positive electrode figure P1 rises.
Here, the variation of the voltage V for side of the positive electrode figure P1, is briefly described in conjunction with Fig. 4 A.Fig. 4 A is medelling
The figure of the time change of the illustrated voltage V that the side of the positive electrode figure P1 after electric current is supplied from starting to side of the positive electrode figure P1
Table.Also, Fig. 4 A and Fig. 4 B are charts when electric spark or partial discharge does not occur (when normal).As described above, according to voltage
Determination part 12 measures voltage V.
By charging to parasitic capacitance C, as shown in Figure 4 A, the voltage V of side of the positive electrode figure P1 slowly rises.Also, it is opening
Begin in the state before supplying electric current to side of the positive electrode figure P1, parasitic capacitance C discharges completely, therefore the voltage of side of the positive electrode figure P1
V is zero.Therefore, in Figure 4 A, the state that the voltage V of side of the positive electrode figure P1 slowly rises from zero is shown.In this way, in this specification
The middle voltage V by side of the positive electrode figure P1 is known as " during charging " (during parasitic capacitance C charges) during rising.
And as described above, amplitude limiter circuit 13 is arranged in detection device 1, it is being accordingly used in protection constant current source 11 just
Potential difference between pole side terminal and negative side terminal is no more than upper limit voltage.As shown in Figure 4 A, if the voltage V of side of the positive electrode figure P1
Upper limit voltage is increased to, then amplitude limiter circuit 13 is started to work, so that voltage V is constant at upper limit voltage.That is, being cut in parasitic capacitance C
Only to the time point that upper limit voltage charges, the charging of parasitic capacitance C terminates.
Next, being illustrated for the electric current I for flowing through negative side figure P2 in conjunction with Fig. 4 B.Fig. 4 B is shown in anode
The voltage V of side figure P1 such as Fig. 4 A flows through the chart of the time change of the electric current I of negative side figure P2 when changing.As described above,
Electric current I is measured according to amperometric determination portion 16.
As shown in Figure 2, it is believed that there are resistance R between wiring graph P1, P2.Resistance R ideal value is infinity, but real
There is limited value on border.Therefore, it can flow through electric current Ir in resistance R.Also, during charging, as shown in Fig. 2, for giving
Electric current (the I of parasitic capacitance C charging0- Ir) flow through negative side figure P2.Therefore, in during charging, for giving parasitic capacitance C
Electric current (the I of charging0- Ir) with the electric current Ir for flowing through resistance R flow through negative side figure P2.Then flow through the electricity of negative side figure P2
Stream adds up to I0.As a result, flowing through constant electric current I in negative side figure P2 in during charging0。
Due to being no longer flow through the electric current for the charging after charging of parasitic capacitance C, in negative side figure
The electric current Ir for then simply flowing through resistance R flowed through in P2.Therefore, during charging after as shown in Figure 4 B, flow through negative side figure
The electric current I of shape P2 is reduced sharply, and then moves closer to Ir.
Therefore, after the electric current I stabilization for terminating and flowing through negative side figure P2 during charging, if can confirm that, electric current I becomes
Enough to small, then it can guarantee the electric current Ir for flowing through resistance R sufficiently small (resistance R is sufficiently large).
Next, for this implementation form detection device 1 circuit substrate detection method, with reference to Fig. 3 flow chart into
Row explanation.
Firstly, control unit 10, in the multiple wiring graphs for being formed in circuit substrate, selection will detect the one of insulating properties
Group wiring graph (step S101).Control unit 10, will be selected as test object by suitably controlling switching circuit 15
One in one group of wiring graph is used as side of the positive electrode figure, and using another as negative side figure.Here, such as earlier figures 2, it will
Wiring graph P1 is illustrated as side of the positive electrode figure and using wiring graph P2 as negative side figure.Accordingly, to side of the positive electrode figure
Shape P1 is initially supplied the electric current (step S102) from constant current source 11.Also, control unit 10 starts to carry out to side of the positive electrode figure
Shape P1 is initially supplied the measurement (step S103) that electric current acts the passed through time.
Control unit 10, the passed through time after starting measurement in step s 103 is until when being more than the preset restriction time limit
During in (judgement of step S104), measured according to amperometric determination portion 16 and flow through the electric current I (step of negative side figure P2
S105)。
If can guarantee the wiring diagram of test object as described above, can confirm that electric current I is sufficiently small after during charging
Resistance R between shape P1, P2 is sufficiently large.Therefore, it is preset to determine whether the electric current I measured in step s105 is less than for control unit 10
Detection terminates threshold value (referring to Fig. 4 B) (step S106).When the measurement result of electric current I, which is less than detection, terminates threshold value, due to resistance
R is sufficiently large, therefore the insulating properties between wiring graph P1, P2 of the judgement test object of control unit 10 is substantially ensured (step
S107).At this point, control unit 10, rises obtained from step S103 and (starts to side of the positive electrode figure until step S107 by the time
Time required until when the electric current I for flowing through negative side figure P2, which is less than detection, terminates threshold value after P1 supply electric current) (step
S108).It will obtain at this time by the time as " Insulation monitoring end time " (with reference to Fig. 4 B).As above, this implementation form
Control unit 10 has the function of the end time determination part 21 as the measurement Insulation monitoring end time.
In addition, though have passed through the sufficient time, but the electric current I for flowing through negative side figure P2 terminates threshold value not less than detection
When, it is believed that resistance R is less than specified value (insulating properties between wiring graph P1, P2 is not substantially ensured).Therefore, control unit 10,
In the state that electric current I terminates threshold value not less than detection, when being more than the restriction time limit (judgement of step S104), test object is determined
Wiring graph P1, P2 between insulating properties do not substantially ensured (step S109).At this point, circuit substrate is determined as by control unit 10
Defective products (step S113), and terminate process.
It, can be wiring graph P1, P2 between test object as described above, according to step S104 to the circulation of step S106
Insulating properties is detected.
But (step S104 applies into step S016) due to being in side of the positive electrode figure P1 in above-mentioned Insulation monitoring
The state of voltage, therefore electric spark or partial discharge may occur between wiring graph P1, P2 of test object.Therefore this reality
The control unit 10 for applying form, judged based on above-mentioned Insulation monitoring the insulating properties between wiring graph P1, P2 for it is abundant when (step
S107), determine electric spark or partial discharge (step S110) whether occurs between wiring graph P1, P2 in the Insulation monitoring.
It is described later for for determining whether to have occurred electric spark and being formed in for partial discharge.Control unit 10, when judgement exists
When electric spark or partial discharge having occurred in Insulation monitoring, circuit substrate is determined as defective products (step S113), and terminates stream
Journey.
In step s 110, when determining in Insulation monitoring there is no when electric spark and partial discharge, 10 needle of control unit
To the predetermined all one group of wiring graphs to be detected, determine whether Insulation monitoring terminates (judgement of step S111), when not
At the end of, continue Insulation monitoring for next group of wiring graph.It is examined when terminating insulation for one group of all wiring graphs
When survey, circuit substrate is determined as non-defective unit by control unit, and terminates process (step S112).
According to above-mentioned detection method, it is good can will only to substantially ensure that the circuit substrate of the insulating properties between wiring graph is determined as
Product.Also, it, can due to that the circuit substrate that electric spark or partial discharge occur in Insulation monitoring can be distinguished as defective products
Improve the reliability for being determined as the circuit substrate of non-defective unit.
Next, the method for detecting electric spark and partial discharge is illustrated in above-mentioned steps S110.
Fig. 5 A and Fig. 5 B show during charging when electric spark occurring between wiring graph P1, P2 of test object just
The time change (Fig. 5 A) of the voltage V of pole side figure P1 and flow through negative side figure P2 electric current I time change (Fig. 5 B).
The moment that electric spark occurs, due to the flow of charge negative side figure P2 of side of the positive electrode figure P1, such as Fig. 5 A institute
Show, the voltage V of side of the positive electrode figure P1 temporarily declines.That is, a part of charge electric discharge charged to parasitic capacitance C.As a result, by
The time (during charging) needed for completing parasitic capacitance C charging than it is normal when it is elongated, therefore electric current I starts the reduced time
Compared to it is normal when it is slack-off.As a result, as shown in Figure 5 B, the Insulation monitoring end time is elongated when comparing normal.Also, in the present invention
In book, " when normal " refers to the state that electric spark or partial discharge do not occur.
As described above, during charging when middle generation electric spark, it is elongated when comparing normal during charging, as a result, absolutely
Edge detect the end time than it is normal when it is elongated.
Next, being illustrated for the situation that partial discharge occurs.Fig. 6 A and Fig. 6 B are shown to be examined during charging
Survey object wiring graph P1, P2 between occur partial discharge when side of the positive electrode figure P1 voltage V time change (Fig. 6 A) with
And flow through the time change (Fig. 6 B) of the electric current I of negative side figure P2.
When partial discharge occurs, the charge of side of the positive electrode figure P1 also flows to negative side figure P2.When partial discharge, due to
It is not that sharply charge flows out as electric spark, therefore can use constant current from the charge of side of the positive electrode figure P1 outflow share
The electric current that source 11 supplies is supplemented.Therefore, as shown in Figure 6A, during partial discharge occurs, side of the positive electrode figure P1's
Although voltage V does not decline and (electric discharge from parasitic capacitance C does not occur), the rate of climb (charging of parasitic capacitance C of voltage V
Speed) it reduces.Therefore, parasitic capacitance C charging needed for time (charging time) than it is normal when it is elongated.
As described above, charging during middle generation partial discharge when, during charging than it is normal when it is also elongated.Therefore, at this point, it is electric
Stream I start the reduced time than it is normal when it is also slack-off.As a result, as shown in Figure 6B, the Insulation monitoring end time is than normal time-varying
It is long.
Next, with reference to Fig. 7 A and Fig. 7 B, it is illustrated for the example that partial discharge occurs after during charging.Figure
7 occur side of the positive electrode figure when partial discharge between wiring graph P1, P2 of test object after showing during charging
The time change (Fig. 7 A) of the voltage V of P1 and flow through negative side figure P2 electric current I time change (Fig. 7 B).
As described above, the voltage V of side of the positive electrode figure P1, which does not decline, (not to be come from during partial discharge occurs
The electric discharge of parasitic capacitance C).Therefore, during charging after when partial discharge occurs, the chart (Fig. 7 A) of voltage V and normal
When voltage V chart (Fig. 5 A) it is almost the same.Therefore, only cannot judge to terminate during charging by the time change of voltage V
Whether partial discharge has occurred afterwards.
But even if at this point, the chart of electric current I can also show the influence of partial discharge.Specifically, as shown in Figure 7 B, it charges
After period, during partial discharge occurs in, the speed of electric current I reduction than it is normal when it is slack-off.Therefore, Insulation monitoring knot
The beam time than it is normal when it is elongated.
As described above, partial discharge or electric spark occur between wiring graph P1, P2 of test object in Insulation monitoring
When, flow through the time change (the reduction speed that electric current I starts reduced time or electric current I) of the electric current I of negative side figure P2
Than it is normal when it is slack-off.
Therefore, the control unit 10 of this implementation form is had and is determined in Insulation monitoring as based on the time change of electric current I
Whether the function of the determination unit 22 of electric spark and partial discharge is occurred.
Specifically, the determination unit 22 of this implementation form determines that the Insulation monitoring obtained in the step S108 of Fig. 3 terminates
Whether the time exceeds schedule time.Also, above-mentioned " stipulated time " based on it is normal when the Insulation monitoring end time preset.
Determination unit 22 is judging Insulation monitoring end time ratio just when exceeding schedule time the Insulation monitoring end time
It is elongated when often.At this point, due to illustrating that electric current I is starting at least one of the reduced reduction speed of time and electric current I ratio just
It is slack-off when often, therefore, it is determined that portion 22 determines that electric spark or partial discharge ("Yes" in step S110) have occurred in Insulation monitoring.
In addition, determination unit 22, when the Insulation monitoring end time being no more than the stipulated time, at the end of judging the Insulation monitoring
Between with it is normal when it is unchanged.At this point, since electric current I both the reduction speed for starting reduced time and electric current I is all recognized
To be normal, therefore, it is determined that portion 22 judges that there is no electric sparks and partial discharge ("No" in step S110) in Insulation monitoring.
The detection device 1 of formed according to this implementation form, in addition to electric spark (Fig. 5 A and the figure that can be detected in the past
Except 5B) in the past, moreover it is possible to detect the generation of partial discharge (Fig. 6 A and Fig. 6 B) for being difficult to be detected.
In particular, after during charging occur partial discharge when (situation of Fig. 7 A and Fig. 7 B), the chart of voltage V with just
(Fig. 5 A) does not change when often.Therefore, it cannot be detected using the variation of voltage V to detect the composition of the patent document 1 of electric spark
Out such as the situation of Fig. 7 A and Fig. 7 B.It is related to this, in this embodiment, due to utilizing the electric current I for flowing through negative side figure P2
Time change, therefore partial discharge can be also detected in the situation of Fig. 7 A and Fig. 7 B.
And the detection device 1 of this implementation form, in Insulation monitoring (circulation of step S104 to step S106) and electricity
It is available to be commonly constructed (constant current source 11, amperometric determination portion 16 etc.) in the detection of spark and partial discharge.Accordingly, exist
In the detection device 1 of this implementation form, the special sensor (sensor) etc. for detecting electric spark or partial discharge is not needed.
Therefore, the composition of detection device 1 can be simplified.
As described above, the detection device 1 of this implementation form includes constant current source 11, amperometric determination portion 16 and sentences
Determine portion 22.Constant current source 11 supplies electric current to one i.e. side of the positive electrode figure P1 of the wiring graph of test object.Amperometric determination
Portion 16 measures the electric current I for flowing through the wiring graph of test object.Determination unit 22, the electric current I's based on the measurement of amperometric determination portion 16
Time change determines electric spark or partial discharge whether has occurred between wiring graph P1, P2 of test object.
That is, flowing through the electricity of the wiring graph when electric spark or partial discharge occurring between wiring graph P1, P2 of test object
Flow I time change than it is normal when it is slack-off.Therefore, the time change based on the electric current I for flowing through wiring graph, can be determined whether to send out
Raw electric spark and partial discharge.
Also, in the detection device of this implementation form 1, amperometric determination portion 16 measures the wiring graph for flowing through test object
Another i.e. electric current of negative side figure P2.
That is, the influence respectively constituted due to being not readily susceptible to side of the positive electrode can be high by the electric current of measurement negative side figure
Measure to precision the electric current for flowing through wiring graph.To detect electric spark or partial discharge to high precision.
Also, as described above, the detection device 1 of this implementation form, including what is measured for measuring amperometric determination portion 16
Time, that is, Insulation monitoring end time end time determination part electric current I required until when being less than detection terminates threshold value
21.Determination unit 22, when exceeding schedule time the Insulation monitoring end time, electric spark or partial discharge is had occurred in judgement.
That is, flowing through negative side figure P2 when electric spark or partial discharge has occurred between wiring graph P1, P2 of test object
Electric current I time change it is slack-off, as a result, to electric current I stablize when until needed for time it is elongated.Therefore, institute as above
It states, when the Insulation monitoring end time is more elongated than stipulated time, can determine that and electric spark or partial discharge has occurred.
Also, as described above, the detection device 1 of this implementation form, including control unit 10, for from starting to side of the positive electrode
After figure P1 supplies electric current, the electric current that amperometric determination portion 16 is measured is super in the state of terminating threshold value not less than preset detection
When spending the preset restriction time limit, determine that the insulating properties between wiring graph P1, P2 of test object is insufficient.
In this way, can detect the insulating properties between wiring graph based on the electric current I for flowing through negative side figure P2.Therefore, according to upper
The detection device 1 for stating composition, using be commonly constructed (constant current source 11, amperometric determination portion 16 etc.) can be achieved Insulation monitoring with
And the detection of electric spark and partial discharge, so as to simplify detection device 1.
Although preferred implementation form of the invention is illustrated above, above-mentioned composition can for example be become as following
Shape.
In above-mentioned embodiment, even if electric spark or partial discharge occur once, to be also determined as defective products, but
Tolerable electric spark (or partial discharge) for several times.
In above-mentioned embodiment, and without using the measurement result of the voltage V based on voltage determination portion 12.Therefore, voltage
Determination part 12 can be omitted.
In previous method (patent document 1), although the generation of partial discharge cannot be detected, electrical fire can be detected
Colored generation.The method by combining previous method and this case invention, the generation and part that can distinguish electric spark are put as a result,
Electricity generation and detected.Therefore, it when electric spark occurs and when partial discharge occurs, can carry out as needed different
Processing.
In above-mentioned embodiment, by first threshold (threshold value used when detecting electric spark and partial discharge) and second
Threshold value (threshold value used when whether judging insulating properties sufficiently) is as identical value (detection terminates threshold value).But first threshold and second
Threshold value can also be different.
Also, although above-mentioned implementation form is the structure for the electric current that negative side figure P2 is flowed through in measurement in amperometric determination portion
At, but from the viewpoint of the electric current that wiring graph P1, P2 are flowed through in measurement, it also may be configured as measuring inflow in amperometric determination portion
The electric current of side of the positive electrode figure P1.But when the composition for the electric current for taking measurement to flow into side of the positive electrode figure P1, due to being easy by just
The influence of pole side respectively constituted, therefore, it is difficult to accurately detect to flow through the electric current of wiring graph.Therefore, it is put from electric spark and part
From the point of view of this point of the detection precision of electricity, the electric current that should preferably take the measurement such as above-mentioned implementation form to flow through negative side figure P2
It constitutes.
Claims (3)
1. a kind of detection device, detects the insulating properties for the wiring graph being formed on circuit substrate, the detection device includes：
Current source supplies electric current to side of the positive electrode figure, and the side of the positive electrode figure is one in the wiring graph of test object；
The electric current of the wiring graph of the test object is flowed through in amperometric determination portion, measurement；And
Determination unit, the time change of the electric current based on amperometric determination portion measurement, determines the wiring graph of the test object
In electric spark or partial discharge whether has occurred,
It further comprise the end time determination part for measuring the end time, the end time is to start certainly to the anode
After side figure supplies electric current, the electric current of amperometric determination portion measurement is until when required until when being less than preset first threshold
Between,
The determination unit, when exceeding schedule time the end time, electric spark or partial discharge is had occurred in judgement.
2. detection device according to claim 1, it is characterised in that negative side figure is flowed through in the amperometric determination portion measurement
Electric current, the negative side figure is another in the wiring graph of the test object.
3. detection device according to claim 1 or 2, it is characterised in that further comprise control unit, for starting certainly
After supplying electric current to the side of the positive electrode figure, when the electric current of amperometric determination portion measurement is not less than preset second threshold
When under state being more than the preset restriction time limit, determine that the insulating properties between the wiring graph of the test object is insufficient.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-176094 | 2013-08-27 | ||
| JP2013176094A JP6229877B2 (en) | 2013-08-27 | 2013-08-27 | Inspection device |
Publications (2)
| Publication Number | Publication Date |
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| CN104422859A CN104422859A (en) | 2015-03-18 |
| CN104422859B true CN104422859B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410397343.6A Active CN104422859B (en) | 2013-08-27 | 2014-08-13 | Detection device |
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| Country | Link |
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| JP (1) | JP6229877B2 (en) |
| KR (1) | KR102215841B1 (en) |
| CN (1) | CN104422859B (en) |
| TW (1) | TWI636263B (en) |
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| JP6095735B2 (en) * | 2014-07-29 | 2017-03-15 | ヤマハファインテック株式会社 | Printed circuit board inspection apparatus and inspection method |
| CN110673000B (en) * | 2019-10-28 | 2021-11-30 | 国网江苏省电力有限公司电力科学研究院 | Online monitoring method and device for partial discharge of oil-immersed current transformer |
| CN111880055B (en) * | 2020-07-09 | 2024-04-16 | 上海联影医疗科技股份有限公司 | Spark detection device and method |
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- 2014-08-08 KR KR1020140102146A patent/KR102215841B1/en active IP Right Grant
- 2014-08-13 CN CN201410397343.6A patent/CN104422859B/en active Active
- 2014-08-20 TW TW103128645A patent/TWI636263B/en active
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| CN101292166A (en) * | 2005-10-18 | 2008-10-22 | 日本电产理德株式会社 | Insulation inspecting device and insulation inspecting method |
| CN1996028A (en) * | 2005-12-28 | 2007-07-11 | 日本电产丽德株式会社 | Substrate checking device and method |
| CN101454680A (en) * | 2006-06-20 | 2009-06-10 | 日本电产理德株式会社 | Substrate inspecting apparatus and substrate inspecting method |
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| CN101937030A (en) * | 2009-06-26 | 2011-01-05 | 日本电产理德株式会社 | Substrate inspection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015045542A (en) | 2015-03-12 |
| TW201508288A (en) | 2015-03-01 |
| KR20150024773A (en) | 2015-03-09 |
| JP6229877B2 (en) | 2017-11-15 |
| CN104422859A (en) | 2015-03-18 |
| KR102215841B1 (en) | 2021-02-16 |
| TWI636263B (en) | 2018-09-21 |
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