CN201909826U - Cable disconnection test circuit - Google Patents
Cable disconnection test circuit Download PDFInfo
- Publication number
- CN201909826U CN201909826U CN2010206492967U CN201020649296U CN201909826U CN 201909826 U CN201909826 U CN 201909826U CN 2010206492967 U CN2010206492967 U CN 2010206492967U CN 201020649296 U CN201020649296 U CN 201020649296U CN 201909826 U CN201909826 U CN 201909826U
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 230000003534 oscillatory effect Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000000523 sample Substances 0.000 abstract description 9
- 230000001939 inductive effect Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The utility model discloses a cable disconnection test circuit which comprises six phase inverters and a power source, wherein the positive pole and the negative pole of the power source are respectively connected with two power source base pins of the six phase inverters. The cable disconnection test circuit is characterized by further comprising a detecting circuit, an oscillating circuit and an alarming circuit, an output signal of the detecting circuit is outputted to the oscillating circuit, and an output signal of the oscillating circuit is outputted to the alarming circuit. When the cable is disconnected, two electrical appliances ate two ends of the cable which is doubted to be disconnected are firstly powered off, a core wire of the cable with the disconnection phenomenon is electrified, and an inductive probe is near to a cable wall, so that the inductive probe can induce the inductive voltage, the lamplight of the device flashes, and the trumpet of the device has buzzing. When the cable is disconnected, the inductive probe can not induce the inductive voltage, the lamplight of the device stops flashing, and the trumpet of the device does not have the buzzing, so that the disconnection point of the cable can be very conveniently found.
Description
Technical field
The utility model relates to a kind of circuit test device, relates in particular to a kind of cable break test circuit.
Background technology
Run into the cable break phenomenon through regular meeting aborning, directly affect production safety, if can not find breakpoint, cabling again.Because find the position of cable break very difficult, the therefore general method of changing cable that adopts.Especially for polycore cable, if take the whole leads that are sealed in the PVC sleeve pipe apart without the method for physics, the position that will detect broken string and breakpoint so is impossible at all.Both waste of manpower financial resources of this method increase operating cost again.If can in time find breakpoint, breakpoint of cable is connect, can resume production fast, also can cut the waste, reduce the production run cost.
The utility model content
The purpose of this utility model is exactly the deficiency that exists at above-mentioned prior art, provide a kind of simple in structure, easy to carry, use reliably, can in time find the cable outage, and the cable break test circuit that can in time report to the police.
Above-mentioned purpose realizes by following proposal:
A kind of cable break test circuit, described circuit comprises No. six phase inverters and power supply, the both positive and negative polarity of described power supply is connected respectively to two power pin of described No. six phase inverters, it is characterized in that, described test circuit also comprises detection circuit, oscillatory circuit and warning circuit, and the output signal of described detection circuit outputs to described oscillatory circuit, and the output signal of described oscillatory circuit outputs to described warning circuit.
According to above-mentioned cable break test circuit, it is characterized in that, described detection circuit comprises resistance R 1, diode D1 and diode D2, the positive pole series connection of described resistance R 1 and diode D1 also is connected on the pin of first pair of anti-phase pin in described No. six phase inverters, an and pin short circuit of another pin of described first pair of anti-phase pin and second pair of anti-phase pin, the positive pole of described diode D2 is connected on the power supply, and negative pole is connected between described resistance R 1 and the diode D1.
According to above-mentioned cable break test circuit, it is characterized in that, capacitor C 1 in the described oscillatory circuit, the positive pole of resistance R 4 and diode D3 is connected in series on another pin of the anti-phase pin of the second couple that is connected to described No. six phase inverters again, a pin of the 3rd pair of anti-phase pin is connected to the positive pole of described diode D3, a pin short circuit of another pin of described the 3rd pair of anti-phase pin and the 4th pair of anti-phase pin, resistance R 3 one ends of described oscillatory circuit are connected between described capacitor C 1 and the resistance R 4, the other end is connected in the shorting stub, and another pin of described the 4th pair of anti-phase pin is connected to described warning circuit.
According to above-mentioned test circuit, it is characterized in that, the emitter-base bandgap grading of the hummer in the described warning circuit, LED, resistance R 5, triode and collector and described power supply form the loop, and another pin of described the 4th pair of anti-phase pin is connected on the base stage of described triode.
According to above-mentioned test circuit, it is characterized in that, between the power pin of described power supply and described No. six phase inverters, be connected with switch.
The beneficial effects of the utility model: test circuit of the present utility model can test out the broken string position of cable easily, thereby can repair cable fast, resume production and reduce the production run cost.
Description of drawings
Fig. 1 is the circuit diagram of test circuit of the present utility model.
Embodiment
Referring to Fig. 1, cable break test circuit of the present utility model comprises No. six phase inverter 27(, and it comprises pin one-14) and power supply 17, the both positive and negative polarity of power supply is connected respectively to two power pin 14,7 of No. six phase inverters 27, test circuit also comprises detection circuit, oscillatory circuit and warning circuit, and the output signal of detection circuit outputs to oscillatory circuit, and the output signal of oscillatory circuit outputs to warning circuit.
Detection circuit comprises resistance R 1(mark 29), diode D1(mark 28) and diode D2(mark 26), the positive pole series connection of resistance R 1 and diode D1 also is connected on the pin one 3 of first pair of anti-phase pin (12,13) in No. six phase inverters 27, an and pin short circuit 11 of another pin one 2 of first pair of anti-phase pin and second pair of anti-phase pin (10,11), the positive pole of diode D2 is connected on the power supply, and negative pole is connected between resistance R 1 and the diode D1.
Capacitor C 1(mark 22 in the oscillatory circuit), resistance R 4(mark 24) and diode D3(mark 25) positive pole serial connection be connected on another pins of the anti-phase pin of the second couple of No. six phase inverters 27 10 again, a pin 9 of the 3rd pair of anti-phase pin is connected to the positive pole of diode D3, pin 5 short circuits of another pin 8 of the 3rd pair of anti-phase pin and the 4th pair of anti-phase pin, the resistance R 3(mark 23 of oscillatory circuit) end is connected between capacitor C 1 and the resistance R 4, the other end is connected in the shorting stub, and another pin of the 4th pair of anti-phase pin is connected to warning circuit.
Hummer in the warning circuit (mark 18), LED (mark 19), resistance R 5(mark 20), the emitter-base bandgap grading of triode (mark 21) and collector and power supply form the loop, and another pin 6 of the 4th pair of phase inverter pin is connected on the base stage of triode.
Between the power pin of power supply (mark 17) and No. six phase inverters 27, be connected with switch (mark 30).
Its circuit theory is: No. six phase inverter 27(such as CD4069 (IC)), R3(220K Ω), R4(560K Ω), Cl(2200 μ F), power supply (3V button cell) etc. forms astable multivibrator, the about lkHz of its oscillation frequency, this frequency is determined by R3, R4 and C1.IC is used for testing 230V AC field signal and its shaping is amplified, and IC the is the switch of pin output level may command oscillator 10..When test probe during away from AC field, IC the 10. pin output keep low level, D3(such as IN4148) conducting make IC the 9. pin also be low level, the blocking of oscillator; 6. also output low level of pin of IC the meanwhile, T(such as model are BC547) by being in, LED extinguishes state, and hummer stops sound.When test probe during near the power lead of band 230v, 50Hz alternating current, in each positive half cycle cycle period, the probe induction current is by Rl(1M Ω) through the D1 rectification, making IC ⒀ pin is high level, IC 10. pin also exports high level, and D3 ends, the oscillator starting of oscillation, make red LED glittering, hummer sends sound (R5 of warning circuit is 47 Ω).The DC+3V power supply adopts button cell.When test, the S1 that closes a switch, energized moves towards the other end from an end of live wire, has the alternating voltage interval at lead, and LED is luminous, and hummer sends sound; When arriving breakpoint, because of no alternating voltage exists, LED extinguishes.LED extinguish that be exactly the breakpoint of live wire.
Using method: when running into cable disconnected elder generation being arranged, remove earlier and suspect the cable two ends electrical appliance that broken string is arranged, have the heart yearn of broken string phenomenon to power up to cable then, allow inductive probe near the cable wall, inductive probe just can be sensed induced voltage, the light flash of device, and loudspeaker have buzzer.When to breakpoint of cable, inductive probe is responded to less than induced voltage, and the light of device stops flicker, and loudspeaker do not have buzzer, so just can easily find breakpoint of cable.
Claims (5)
1. cable break test circuit, described circuit comprises No. six phase inverters and power supply, the both positive and negative polarity of described power supply is connected respectively to two power pin of described No. six phase inverters, it is characterized in that, described test circuit also comprises detection circuit, oscillatory circuit and warning circuit, and the output signal of described detection circuit outputs to described oscillatory circuit, and the output signal of described oscillatory circuit outputs to described warning circuit.
2. cable break test circuit according to claim 1, it is characterized in that, described detection circuit comprises resistance R 1, diode D1 and diode D2, the positive pole series connection of described resistance R 1 and diode D1 also is connected on the pin of first pair of anti-phase pin in described No. six phase inverters, an and pin short circuit of another pin of described first pair of anti-phase pin and second pair of anti-phase pin, the positive pole of described diode D2 is connected on the power supply, and negative pole is connected between described resistance R 1 and the diode D1.
3. cable break test circuit according to claim 2, it is characterized in that, capacitor C 1 in the described oscillatory circuit, the positive pole of resistance R 4 and diode D3 is connected in series on another pin of the anti-phase pin of the second couple that is connected to described No. six phase inverters again, a pin of the 3rd pair of anti-phase pin is connected to the positive pole of described diode D3, a pin short circuit of another pin of described the 3rd pair of anti-phase pin and the 4th pair of anti-phase pin, resistance R 3 one ends of described oscillatory circuit are connected between described capacitor C 1 and the resistance R 4, the other end is connected in the shorting stub, and another pin of described the 4th pair of anti-phase pin is connected to described warning circuit.
4. test circuit according to claim 3, it is characterized in that, the emitter-base bandgap grading of the hummer in the described warning circuit, LED, resistance R 5, triode and collector and described power supply form the loop, and another pin of described the 4th pair of anti-phase pin is connected on the base stage of described triode.
5. test circuit according to claim 4 is characterized in that, is connected with switch between the power pin of described power supply and described No. six phase inverters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206492967U CN201909826U (en) | 2010-12-09 | 2010-12-09 | Cable disconnection test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206492967U CN201909826U (en) | 2010-12-09 | 2010-12-09 | Cable disconnection test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201909826U true CN201909826U (en) | 2011-07-27 |
Family
ID=44302027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206492967U Expired - Lifetime CN201909826U (en) | 2010-12-09 | 2010-12-09 | Cable disconnection test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201909826U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445631A (en) * | 2011-12-07 | 2012-05-09 | 宁夏电力公司信息通信分公司 | Cable breakpoint tester |
| CN103033723A (en) * | 2012-12-03 | 2013-04-10 | 四川省电力公司内江电业局 | Movable cable fault tracing device |
-
2010
- 2010-12-09 CN CN2010206492967U patent/CN201909826U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445631A (en) * | 2011-12-07 | 2012-05-09 | 宁夏电力公司信息通信分公司 | Cable breakpoint tester |
| CN103033723A (en) * | 2012-12-03 | 2013-04-10 | 四川省电力公司内江电业局 | Movable cable fault tracing device |
| CN103033723B (en) * | 2012-12-03 | 2015-12-09 | 四川省电力公司内江电业局 | Removal cable troubleshoot device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110727 |