CN207301179U - A kind of loop resistance detecting system based on ultracapacitor group - Google Patents
A kind of loop resistance detecting system based on ultracapacitor group Download PDFInfo
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- CN207301179U CN207301179U CN201721349475.7U CN201721349475U CN207301179U CN 207301179 U CN207301179 U CN 207301179U CN 201721349475 U CN201721349475 U CN 201721349475U CN 207301179 U CN207301179 U CN 207301179U
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Abstract
The utility model discloses a kind of loop resistance detecting system based on ultracapacitor group, including acquisition control module, computer, regulated power supply, voltage controllable constant-current charger, isolation control module, isolation measurement module, current diverter, silicon-controlled and ultracapacitor group；Its Computer and the input terminal of acquisition control module connect；The output terminal of acquisition control module is connected by isolating control module with silicon-controlled, voltage controllable constant-current charger, and the voltage at current diverter both ends, loop resistance both ends and ultracapacitor group both ends is acquired respectively by isolation measurement module；It is silicon-controlled that acquisition control module and isolation module are powered with loop resistance, ultracapacitor group, current diverter and the composition series loop of voltage controllable constant-current charger, voltage controllable constant-current charger access 220V AC networks, regulated power supply；Acquisition control module is controlled current diverter by isolation module.
Description
Technical field
The present invention relates to the loop resistance detection field of middle high-pressure equipment, and super capacitor is based on more particularly, to one kind
The loop resistance detecting system of device group.
Background technology
Power equipment can be there are contact resistance when being contacted with other components, and the size of contact resistance can directly affect back
Ability of shutting off in road, so, it is an extremely important test in electrical equipment that loop resistance detection is carried out to equipment.
The galvanic circle of conducting connecting part is by other connections in the contact resistance and circuit between dynamic and static contact or connector
The resistance composition of line, the resistance value of wherein contact resistance is far longer than the resistance value of connecting line, therefore galvanic circle resistance is main
It is to be determined by contact resistance.Contact resistance generally by contraction protein and sheet resistance two parts into.When the contact of conducting connecting part
When state is normal, high current flow through contact position generate heat very little, therefore loop resistance with electric current change when its change rate
Less；When the contact condition of conducting rod is abnormal, its contact resistance is significantly larger than resistance value during normal condition, and high current, which flows through, to be made
Contact position seriously generates heat.Melting welding will easily occur between dynamic/static contact, cause contact surface to produce oxide-film and burr.Burr
Presence can cause the unstable of contact, under certain condition, although voltage is not high, it is also possible to cause between dynamic/static contact
Electrical breakdown, cause conducting rod failure.Moreover, conductor adapting piece fever is by further such that the galvanic circle electricity of conducting connecting part
Resistance increase, the fever of conductor adapting piece is more serious, forms vicious circle, becomes a big security risk.
Conducting connecting part loop resistance is typically smaller than 100 μ Ω, the pressure drop produced by the electric current of 100A only 10mV,
It is easy to be submerged in noise under strong electromagnetic at the scene.In order to which more accurately test loop resistance tests electricity, it is necessary to improve
Stream.From the point of view of research both domestic and external, contact state can more be judged exactly using high-current test.Fault-free contact is in high current
Under can be presented normal resistance value, and resistance value is relatively stablized under different test electric currents, and failure contact is under different test electric currents
Resistance value is unstable and bigger than normal.
But when the contact condition of conducting connecting part is abnormal, its loop resistance is significantly larger than resistance value during normal condition, greatly
Electric current, which flows through, contact position is seriously generated heat.Moreover, conductor adapting piece fever is by further such that the conduction of conducting connecting part
Loop resistance increases, and conductor adapting piece fever is more serious, is become apparent from this time with the change loop resistance change of electric current.But
It is, it is more difficult with the change rate measurement of electric current for conducting connecting part loop resistance, influence the comparison and judgement of measurement result.
The heavy current impact source super large capacitor of generally use now used both at home and abroad carries out electric discharge realization, is only capable of discharging
Period to contact position produce high current, the duration is short, again impact interval time length, device charge during contact point
Sufficiently cool, contact has recovered to the former state of cooling when detecting again, i.e., can not accurately be detected under high current and heat condition
Its loop resistance state.
The content of the invention
Present invention aim to address at present can not accurate measure loop resistance states under high current and heat condition
Defect, designs a kind of loop resistance detecting system based on ultracapacitor group.
To realize above goal of the invention, the technical solution of use is：
A kind of loop resistance detecting system based on ultracapacitor group, including acquisition control module, computer, voltage stabilizing electricity
Source, voltage controllable constant-current charger, isolation control module, isolation measurement module, current diverter, silicon-controlled and ultracapacitor
Group；Its Computer and the input terminal of acquisition control module connect；The output terminal of acquisition control module is by isolating control module
It is connected with silicon-controlled, voltage controllable constant-current charger, by isolation measurement module respectively to current diverter both ends, loop resistance
The voltage at both ends and ultracapacitor group both ends is acquired；Silicon-controlled and loop resistance, ultracapacitor group, current diverter
Series loop, voltage controllable constant-current charger access 220V AC networks, regulated power supply are formed with voltage controllable constant-current charger
Acquisition control module and isolation module are powered；Acquisition control module controls current diverter by isolation module
System.
Preferably, the isolation measurement module and isolation control module are industrial personal computer.
Preferably, the current diverter includes charging current current divider and discharge current current divider.
Preferably, described silicon-controlled including the silicon-controlled and discharging thyristor that charges, quantity is respectively 3.
Preferably, the ultracapacitor group is daraf(reciprocal of farad) level capacitor group, and quantity is 3, and specification is respectively 54F
(16V)、108F(24V)、108F(48V)。
Preferably, the regulated power supply is 24V regulated power supplies.
Preferably, the computer includes laptop, is connected by USB with acquisition control module.
Preferably, the acquisition control module includes 16 high speed USB capture cards.
Compared with prior art, the beneficial effects of the utility model are：
The utility model is examined using ultracapacitor group as discharge power supply by circuit resistance value under different current values
Survey and calculate the change rate of resistance value under different electric currents, can be suitable for strong electromagnetic interference environment simultaneously can accurately measure Ω grades of μ's
The loop resistance of high voltage large capcity conducting connecting part.
Brief description of the drawings
Fig. 1 is a kind of loop resistance detecting system schematic diagram based on ultracapacitor group；
Fig. 2 is a kind of loop resistance detecting system charging principle figure based on ultracapacitor group；
Fig. 3 is a kind of loop resistance detecting system discharge principle figure based on ultracapacitor group；
Embodiment
Attached drawing is only for illustration, it is impossible to is interpreted as the limitation to this patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
Please refer to Fig.1, Fig. 1 is a kind of loop resistance detecting system schematic diagram based on ultracapacitor group.
A kind of loop resistance detecting system based on ultracapacitor group, including acquisition control module, computer, voltage stabilizing electricity
Source, voltage controllable constant-current charger, isolation control module, isolation measurement module, current diverter, silicon-controlled and ultracapacitor
Group；Its Computer and the input terminal of acquisition control module connect；The output terminal of acquisition control module is by isolating control module
It is connected with silicon-controlled, voltage controllable constant-current charger, by isolation measurement module respectively to current diverter both ends, loop resistance
The voltage at both ends and ultracapacitor group both ends is acquired；Silicon-controlled and loop resistance, ultracapacitor group, current diverter
Series loop, voltage controllable constant-current charger access 220V AC networks, regulated power supply are formed with voltage controllable constant-current charger
Acquisition control module and isolation module are powered；Acquisition control module controls current diverter by isolation module
System.
Preferably, the isolation measurement module and isolation control module are industrial personal computer.
Preferably, the current diverter includes charging current current divider and discharge current current divider.
Preferably, described silicon-controlled including the silicon-controlled and discharging thyristor that charges, quantity is respectively 3.
Preferably, the ultracapacitor group is daraf(reciprocal of farad) level capacitor group, and quantity is 3, and specification is respectively 54F
(16V)、108F(24V)、108F(48V)。
Preferably, the regulated power supply is 24V regulated power supplies.
Preferably, the computer includes laptop, is connected by USB with acquisition control module.
Preferably, the acquisition control module includes 16 high speed USB capture cards.
In practical work process, the system is divided into charging circuit and discharge circuit.
Please refer to Fig.2, Fig. 2 is charging circuit schematic diagram of the present invention.
16 high speed USB capture cards are connected by laptop, by controlling silicon-controlled and detecting charging current and electricity
Pressure, represents that capacitor group is full of electric charge, charge closing circuit is so that correspondence is silicon-controlled at this time when charging current is decreased obviously
Cut-off, restarts other capacitor group chargings, realizes that a set of charging unit completes the charging of 3 group capacitor groups successively, passes through adjusting
Different charging voltages can ensure different capacitor groups filled with different magnitudes of voltage, so that electric current is big when reaching adjusting electric discharge
It is small.At the same time device can by increasing capacitor group, silicon-controlled and acquisition control card channel expands number of shocks.
Please refer to Fig.3, Fig. 3 is discharge circuit schematic diagram of the present invention.
16 high speed USB capture cards are connected by laptop, by controlling first group of super capacitor of control machines
Device group is discharged, and the dash current instantaneous value that ohmically voltage may know that generation is gathered by sampling card.When current value is gradual
Start the electric discharge of second group of ultracapacitor during reduction, and 3 group capacitors discharge one by one, by the voltage of detection resistance both sides,
Computing is carried out with the voltage on divider resistance, can accurately calculate multiple loop resistance resistance values under different dash currents.
The actually detected step of loop resistance is as follows：
S1：System self-test；
S2：Adjustable voltage is set, starts silicon-controlled 1, ultracapacitor group 1 charges；If 1 electricity of ultracapacitor group is charged to
Setting value then goes to step S3；
S3：Close adjustable voltage and close silicon-controlled 1, reset adjustable voltage, start silicon-controlled 2, ultracapacitor group 2
Charging；Step S4 is gone to if ultracapacitor group electricity is charged to setting value；
S4：Close adjustable voltage and close silicon-controlled 2, reset adjustable voltage, start silicon-controlled 3, ultracapacitor group 3
Charging；Step S5 is gone to if ultracapacitor group is charged to setting value；
By controlling card control voltage controllable constant-current charger, its charging voltage is set to meet the requirements, the electricity of detection charging at this time
Size is flowed, when electric current as low as certain value this group of capacitance tomorrow has been filled with, and starts other capacitor groups chargings, so will whole electricity
Container is full of electric charge
S5：Charge closing power supply is simultaneously closed all silicon-controlled；
S6：Ultracapacitor group 1 is discharged, record loop resistance both sides electric current I1 and measuring loop resistance value R1；
S7：Ultracapacitor group 1 is discharged to peak point current half；
S8：Ultracapacitor group 2 is discharged, record loop resistance both sides electric current I2 and measuring loop resistance value R2；
S9：Ultracapacitor group 2 is discharged to peak point current half；
S10：Ultracapacitor group 3 is discharged, record loop resistance both sides electric current I3 and measuring loop resistance value R3；
By controlling card control silicon-controlled 1 to start, capacitor group 1 is set to discharge measured resistance, when electric current is reduced to half
During left and right, start silicon-controlled 2, so all capacitor groups are discharged one by one.
S11：Contact condition is assessed by change of the normalization algorithm to resistance value under three current peaks, wherein
Normalized data formula is
During wherein change rate K≤1.4, it is good to judge that loop resistance contact connects solution, as K >=1.4, judges that loop resistance touches
It is bad that head connects solution.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate example of the present invention, and is not
It is the restriction to embodiments of the present invention.For those of ordinary skill in the field, on the basis of the above description
It can also make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., should be included in right of the present invention
It is required that protection domain within.
Claims (8)
1. a kind of loop resistance detecting system based on ultracapacitor group, it is characterised in that including acquisition control module, calculate
Machine, regulated power supply, voltage controllable constant-current charger, isolation control module, isolation measurement module, current diverter, it is silicon-controlled and
Ultracapacitor group；Its Computer and the input terminal of acquisition control module connect；The output terminal of acquisition control module by every
It is connected from control module with silicon-controlled, voltage controllable constant-current charger, by isolation measurement module respectively to current diverter two
The voltage at end, loop resistance both ends and ultracapacitor group both ends is acquired；Silicon-controlled and loop resistance, ultracapacitor
Group, current diverter and the composition series loop of voltage controllable constant-current charger, the access 220V exchanges of voltage controllable constant-current charger
Power grid, regulated power supply are powered acquisition control module and isolation module；Acquisition control module is by isolation module to electric current
Current divider is controlled.
A kind of 2. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
It is industrial personal computer to state isolation measurement module and isolation control module.
A kind of 3. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
Stating current diverter includes charging current current divider and discharge current current divider.
A kind of 4. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
State it is silicon-controlled including charge silicon-controlled and discharging thyristor, quantity respectively be 3.
A kind of 5. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
It is daraf(reciprocal of farad) level capacitor group to state ultracapacitor group, and quantity is 3, and specification is respectively 54F (16V), 108F (24V), 108F
(48V)。
A kind of 6. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
It is 24V regulated power supplies to state regulated power supply.
A kind of 7. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
Stating computer includes laptop, is connected by USB with acquisition control module.
A kind of 8. loop resistance detecting system based on ultracapacitor group according to claim 1, it is characterised in that institute
Stating acquisition control module includes 16 high speed USB capture cards.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607787A (en) * | 2017-10-18 | 2018-01-19 | 广东电网有限责任公司佛山供电局 | A kind of loop resistance detecting system and method based on ultracapacitor group |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607787A (en) * | 2017-10-18 | 2018-01-19 | 广东电网有限责任公司佛山供电局 | A kind of loop resistance detecting system and method based on ultracapacitor group |
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