CN205992035U - A kind of multi-core cable testing circuit - Google Patents
A kind of multi-core cable testing circuit Download PDFInfo
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- CN205992035U CN205992035U CN201620804561.1U CN201620804561U CN205992035U CN 205992035 U CN205992035 U CN 205992035U CN 201620804561 U CN201620804561 U CN 201620804561U CN 205992035 U CN205992035 U CN 205992035U
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- optocoupler
- detection module
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Abstract
A kind of multi-core cable testing circuit, optocoupler U1 input side one end connects control end, the other end connects power end VCC1 by resistance R1；Optocoupler U1 outlet side one end ground connection, the other end connect power end VCC2 by resistance R2；Optocoupler U2 input side parallel diode D1, diode D1 anode connects resistance R6 one end, and diode D1 negative electrode connects the optocoupler U1 input side other end, and one end of optocoupler U2 outlet side connects power end VCC1, the other end ground connection of optocoupler U2 outlet side by resistance R3.Optocoupler U3 input side one end connects control end, the other end connects power end VCC3 by resistance R4；Optocoupler U3 outlet side one end connects diode D2 negative electrode, the other end connects optocoupler U4 input side one end, the optocoupler U4 input side other end connects diode D2 anode, one end of optocoupler U4 outlet side connects power end VCC3, the other end ground connection of optocoupler U4 outlet side by resistance R5.A kind of multicore cable redesigns this utility model on the basis of line circuit in the prior art, eliminates the unclear hidden danger of fault distinguish.
Description
Technical field
A kind of this utility model multi-core cable testing circuit, for multi-core cable check and correction.
Background technology
Multi-core cable is to a great problem that line numbering and fault detect are the intensive construction fields of multi-core cable, some associated row
Industry practitioner proposes some solutions also for this.Compared by retrieval, " a kind of multicore cable is to line electricity for Chinese patent
Road "（201420050080.7）Circuit design more other design for, it is the most ingenious to line method, operation also very simple
It is single,
But this circuit carries out having an important precondition to be exactly that multicore cable must be normally it is impossible to deposit when line is operated
In short circuit or open circuit fault.If there is open circuit or short trouble in multicore cable, this circuit just cannot be carried out identifying, its
Reason is, when normally to line, when pusher side is flowed to line current by programme-control, a line conductor can only be had to be that high voltage is sent out
Sending end, other is all low level, so could form the condition of testing circuit closure, when host side is to line, under normal circumstances,
Also only one road current signal corresponds to signal sending end, can be detected, in this, as to line numbering foundation.If to be measured
Two or many core short circuits in core link together, and be copper core because the units in charge of construction such as electric power use wire, and core is relatively
Slightly, for Host Detection module, its resistance value is very little, and detection electric current can be passed straight back to slave by short-circuit conductors
Power cathode is detected in side, and taking situation shown in the accompanying drawing 6 of Figure of description as a example, electric current flows out from STM1 module, through location of short circuit
Power cathode is back to by the diode D3 of STM2 module, because there is stabilizing voltage characteristic, diode D3 during diode forward conducting
Anode voltage is very low, and corresponding detection module MTM1 and MTM2 connecting of host computer side wire can not be able to turn on because of brownout, this
When host computer side be considered as by direct short-circuit, it is impossible to effective test signal is enough detected, just to confirm fault details；When treating survey line
When there is a road or the open circuit of multichannel core in core, detect electric current transmitting terminal because wire break is it is impossible to form closed-loop path,
Host computer side equally can not detect useful signal.Therefore, this circuit cannot be distinguished from short circuit and breaking two kinds of different malfunctions,
There is limitation and potential safety hazard.
Content of the invention
For solving above-mentioned technical problem, this utility model provides a kind of multi-core cable testing circuit, " a kind of in Chinese patent
Multicore cable is to line circuit "（201420050080.7）On the basis of redesigned, eliminate the unclear hidden danger of fault distinguish.
This utility model be employed technical scheme comprise that：
A kind of multi-core cable testing circuit, including multiple main frames side detection module, multiple from pusher side detection module.Each
Include optocoupler U1, optocoupler U2 from pusher side detection module, optocoupler U1 input side one end connects control end, the other end passes through resistance R1 even
Meet power end VCC1；Optocoupler U1 outlet side one end ground connection, the other end connect power end VCC2 by resistance R2；Optocoupler U2 input side
Parallel diode D1, diode D1 anode connects resistance R6 one end, and diode D1 negative electrode connects the optocoupler U1 input side other end, light
One end of coupling U2 outlet side connects power end VCC1, the other end ground connection of optocoupler U2 outlet side by resistance R3, and optocoupler U2 exports
One end of side constitutes from the test side of pusher side detection module, and the resistance R6 other end is with the binding post from pusher side detection module even
Connect.
Each host computer side detection module includes optocoupler U3, optocoupler U4, and optocoupler U3 input side one end connects control end, another
End connects power end VCC3 by resistance R4；Optocoupler U3 outlet side one end connects diode D2 negative electrode, the other end connects optocoupler U4
Input side one end, the optocoupler U4 input side other end connects diode D2 anode, and resistance R5 is passed through even in one end of optocoupler U4 outlet side
Connect power end VCC3, the other end ground connection of optocoupler U4 outlet side, one end of optocoupler U4 outlet side constitutes host computer side detection module
Test side, diode D2 negative electrode is connected with the binding post of host computer side detection module；
Be used between the binding post and the binding post of host computer side detection module of pusher side detection module connecting wire first,
Tail end.
The size of described resistance R6 is general-purpose diode conducting resistance size, and resistance R6 Standard resistance range controls 100 to 500
Between ohm.
Described host computer side detection module is three, is three from pusher side detection module,
Described control end from pusher side detection module, the control end of host computer side detection module are all sent by single-chip microcomputer and control
Signal.
A kind of this utility model multi-core cable testing circuit, under short-circuit state, newly-increased element（Resistance）Increased slave
Resistance value in the detection module current loop of side, when can short trouble in circuit in this resistance, the electricity of lifting location of short circuit
Pressure value, thus change because conductor resistance too little, and will the corresponding host computer side detection module direct short-circuit being connected situation, test electricity
Stream can flow through host computer side detection module through short-circuit junction point, then can be detected by host computer side single chip circuit, just can be true
Determine the connection terminal number of short-circuit conductors.
Brief description
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is single core cable testing circuit figure of the present utility model.
Fig. 2 is multi-core cable testing circuit figure of the present utility model（Three line conductors）.
Fig. 3 is dead short testing circuit figure of the present utility model（Three line conductors）.
Fig. 4 is partial short circuit testing circuit figure of the present utility model（Three line conductors）.
Fig. 5 is open circuit fault testing circuit figure of the present utility model（Three line conductors）.
Fig. 6 is the failure detector circuit figure described in background technology.
Specific embodiment
As shown in figure 1, a kind of multi-core cable testing circuit, including multiple main frames side detection module, multiple from pusher side detection
Module.
Each includes optocoupler U1, optocoupler U2 from pusher side detection module, and optocoupler U1 input side one end connects control end, another
End connects power end VCC1 by resistance R1；Optocoupler U1 outlet side one end ground connection, the other end connect power end by resistance R2
VCC2.Optocoupler U2 input side parallel diode D1, diode D1 anode connects resistance R6 one end, and diode D1 negative electrode connects optocoupler
The U1 input side other end, one end of optocoupler U2 outlet side connects power end VCC1 by resistance R3, optocoupler U2 outlet side another
End ground connection, one end of optocoupler U2 outlet side constitutes from the test side of pusher side detection module, and the resistance R6 other end detects with from pusher side
The binding post of module connects；
Each host computer side detection module includes optocoupler U3, optocoupler U4, and optocoupler U3 input side one end connects control end, another
End connects power end VCC3 by resistance R4；Optocoupler U3 outlet side one end connects diode D2 negative electrode, the other end connects optocoupler U4
Input side one end, the optocoupler U4 input side other end connects diode D2 anode, and resistance R5 is passed through even in one end of optocoupler U4 outlet side
Connect power end VCC3, the other end ground connection of optocoupler U4 outlet side, one end of optocoupler U4 outlet side constitutes host computer side detection module
Test side, diode D2 negative electrode is connected with the binding post of host computer side detection module；
Be used between the binding post and the binding post of host computer side detection module of pusher side detection module connecting wire first,
Tail end.
The size of described resistance R6 is general-purpose diode conducting resistance size, and resistance R6 Standard resistance range controls 100 to 500
Between ohm.
Described host computer side detection module is three, is three from pusher side detection module,
Described control end from pusher side detection module, the control end of host computer side detection module are all sent by single-chip microcomputer and control
Signal.
First, short trouble detection：
Short trouble detection is divided into two kinds of situations, and all short circuit links together all cores of the first.Now, though cable
There are many cores, but same wire of class is it is impossible to imitate loop by host computer side with being formed with from pusher side, main frame is shorted, no
Validity Test can be carried out, the therefore first step will determine that circuit whether there is such extreme phenomenon of the failure.
Detection concrete grammar is shown in accompanying drawing 3, as follows by all cores（Taking detect three line conductors as a example）Head end is connected to slave
On the binding post of side detection module, tail end is not connected to any equipment, sends control signal by single-chip microcomputer, keeps each moment
A road control signal can only be had to be high level, such as will be set to high level from the P1.0 end of pusher side detection module STM1, will be from pusher side
The P1.1 foot of detection module STM2, it is set to low level from the P1.2 foot of pusher side detection module STM3, now optocoupler U1 is not turned on,
Diode D1 negative electrode, under pull-up resistor R2 effect, assumes high voltage, and control electric current controls side from detecting from pusher side through optocoupler U2
Module STM1 terminals flow out, and optocoupler U5, U9 conducting, diode D3, D5 negative electrode is grounded via optocoupler U5, U9, from pusher side inspection
Survey the P0.0 terminal level signal of module STM1, if low level, then show that circuit defines loop, has short trouble,
If P0.0 is high level, shows that circuit does not form loop, there is not short trouble, according to said method control test electric current successively
From flowing out from pusher side detection module STM2, from the terminals of pusher side detection module STM3, and detect the corresponding survey of this module simultaneously
Examination terminals P 0.1 and P0.2, if P0.1 and P0.2 terminal all assumes low level in detection process, illustrate all core short circuits
Together, failure cause is found out.
If eliminating the extreme failure condition that all cores are shorted together, for partial short circuit fault wire detection side
Formula is as follows, sees accompanying drawing 4, so that three line conductor tests connect as a example illustrates, all wire head ends are connected to slave side terminal,
Tail end is connected to host computer side binding post, sends control signal by single-chip microcomputer, keeps each moment that a road can only be had to control letter
Number it is high level, such as will be set to high level from the P1.0 end of pusher side detection module STM1, by from pusher side detection module STM2's
P1.1 foot, it is set to low level from the P1.2 foot of pusher side detection module STM3, now optocoupler U1 is not turned on, and diode D1 negative electrode exists
Under pull-up resistor R2 effect, assume high voltage, control electric current flows out from test module STM1 terminals, and optocoupler U5, U9 conducting,
Diode D3, D5 negative electrode is grounded via optocoupler U5, U9, and the host computer side detection module MTM1 that detection host computer side is connected with this core surveys
The test lead P3.1 of examination end P3.0 and host computer side detection module MTM2, if the two all assumes low level, illustrates that host computer side detects
On module MTM1, host computer side detection module MTM2 binding post, wire is all constituted with the wire on pusher side detection module STM
, there is short circuit between the wire connecting on host computer side detection module MTM1, host computer side detection module MTM2, by main frame in path
Binding post number can be found rapidly wire short trouble and be located, and workmen can fix a breakdown according to testing result.
2nd, open circuit fault detection：
Open circuit fault detects, its circuit connects sees accompanying drawing 5, so that three line conductor tests connect as a example illustrates, by all wires
Head end is connected on slave side terminal, and tail end is connected to host computer side binding post, sends control signal by single-chip microcomputer, protects
Holding each moment, can only to have a road control signal be high level, such as the P1.0 end from pusher side detection module STM1 is set to high electricity
Flat, the P1.1 foot from pusher side detection module STM2, the P1.2 foot from pusher side detection module STM3 are set to low level, now optocoupler
U1 is not turned on, and diode D1 negative electrode, under pull-up resistor R2 effect, assumes high voltage, control electric current is from from pusher side detection module
STM1 terminals flow out, and optocoupler U5, U9 turn on, and diode D3, D5 negative electrode is grounded via optocoupler U5, U9, because the first line conductor
There is open circuit fault, whole electric current can not constitute effective loop, any road detection module of host computer side all can not detect effectively
Low level signal, by programme-control, according to test signal transmission order, determines the end being connected from pusher side open circuit fault wire
Son number, workmen can carry out troubleshooting according to testing result.
Claims (4)
1. a kind of multi-core cable testing circuit, including multiple main frames side detection module, multiple from pusher side detection module, its feature exists
In：Each includes optocoupler U1, optocoupler U2 from pusher side detection module, and optocoupler U1 input side one end connects control end, the other end leads to
Cross resistance R1 and connect power end VCC1；Optocoupler U1 outlet side one end ground connection, the other end connect power end VCC2 by resistance R2；Light
Coupling U2 input side parallel diode D1, diode D1 anode connects resistance R6 one end, and diode D1 negative electrode connects optocoupler U1 input
The side other end, one end of optocoupler U2 outlet side connects power end VCC1 by resistance R3, and the other end of optocoupler U2 outlet side is grounded,
One end of optocoupler U2 outlet side is constituted from the test side of pusher side detection module, the resistance R6 other end and connecing from pusher side detection module
Line terminals connect；
Each host computer side detection module includes optocoupler U3, optocoupler U4, and optocoupler U3 input side one end connects control end, the other end leads to
Cross resistance R4 and connect power end VCC3；Optocoupler U3 outlet side one end connects diode D2 negative electrode, the other end connects optocoupler U4 input
Side one end, the optocoupler U4 input side other end connects diode D2 anode, and one end of optocoupler U4 outlet side is passed through resistance R5 and connected electricity
Source VCC3, the other end ground connection of optocoupler U4 outlet side, one end of optocoupler U4 outlet side constitutes the detection of host computer side detection module
End, diode D2 negative electrode is connected with the binding post of host computer side detection module；
Be used for being connected between the binding post and the binding post of host computer side detection module of pusher side detection module core to be measured first,
Tail end.
2. according to claim 1 a kind of multi-core cable testing circuit it is characterised in that：The size of described resistance R6 is 100
To between 500 ohm.
3. according to claim 1 a kind of multi-core cable testing circuit it is characterised in that：Described host computer side detection module is three
Individual, it is three from pusher side detection module.
4. according to claim 1 a kind of multi-core cable testing circuit it is characterised in that：The described control from pusher side detection module
End processed, the control end of host computer side detection module all send control signal by single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620804561.1U CN205992035U (en) | 2016-07-28 | 2016-07-28 | A kind of multi-core cable testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620804561.1U CN205992035U (en) | 2016-07-28 | 2016-07-28 | A kind of multi-core cable testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992035U true CN205992035U (en) | 2017-03-01 |
Family
ID=58102757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620804561.1U Expired - Fee Related CN205992035U (en) | 2016-07-28 | 2016-07-28 | A kind of multi-core cable testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992035U (en) |
-
2016
- 2016-07-28 CN CN201620804561.1U patent/CN205992035U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20190728 |