CN206450782U - A kind of hand-held cable automatic trouble locating arrangement - Google Patents
A kind of hand-held cable automatic trouble locating arrangement Download PDFInfo
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- CN206450782U CN206450782U CN201621362141.9U CN201621362141U CN206450782U CN 206450782 U CN206450782 U CN 206450782U CN 201621362141 U CN201621362141 U CN 201621362141U CN 206450782 U CN206450782 U CN 206450782U
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Abstract
The utility model discloses a kind of hand-held cable automatic trouble locating arrangement, the measuring distance of cable to be measured is manually selected by rotary switch, the test problem of bifurcated cable can be effectively solved；High-speed sampling is realized by 4 passage AD9288 chips, the stability of positioning precision and system is improved；By setting 3 meters of test extended lines to improve short-range fault location precision, the test problem of testing blind zone is effectively solved；By setting screen locking button, test data can be latched in real time, facilitate user record test result；Especially for sporadic, intermittent defect, once there is test result, user can carry out a key-lock screen, record test result.
Description
Technical field
The utility model belongs to cable detection technique field, and in particular to a kind of hand-held cable fault automatic location dress
Put.
Background technology
Current testing lines device is based primarily upon time domain reflection technology, by artificial judgment waveform analysis fault type,
By controlling cursor to realize Distance Judgment manually, testing efficiency is relatively low and orientation distance is easily influenceed by people.Current time domain is anti-
Test device is penetrated mainly for two-wire parallel cables, test result is difficult to judge if there is bifurcated.
Utility model content
In view of this, the purpose of this utility model be to provide one kind can also be automatic with automatic decision cable fault type
Fault distance is positioned, test scope selection can also be carried out according to cable bifurcated situation.
A kind of cable automatic trouble locating arrangement, including hand-held set and internal control circuit, the internal control circuit bag
Include programmable system SOPC, FPGA control logic modules and 4 passage modulus acquisition modules on piece；
The FPGA control logic modules include pulses generation module, pulse choice module, AD sampling control modules and
FIFO memory modules；
The pulses generation module produces the test pulse signal for a variety of pulsewidths that test may be required；Pulse choice module
The a variety of test pulse signal behaviors one kind produced on piece under programmable system SOPC control to pulses generation module is exported；
The pulse that the amplitude control module is exported on piece under programmable system SOPC control to pulse choice module
Signal enters line amplitude enhanced processing, and the test pulse signal after processing is linked into tested cable by bnc interface；
The AD sampling control modules export 4 road phase differences on piece under programmable system SOPC control be 90 degree and frequency
The adjustable sampling clock of rate；
The control for the 4 road sampling clocks that the 4 passage modulus acquisition module is exported according to AD sampling control modules, it is right successively
The reflected signal of test pulse signal and cable is acquired, and finally enters the signal data feeding FIFO memory modules of collection
Row storage；
The FIFO memory modules are used to store test pulse signal and reflected signal；
Described upper programmable system SOPC is used for the test pulse signal for reading the FIFO memory modules and reflection is believed
Number, it is open circuit or short circuit to judge cable fault type to be measured.
Further, described upper programmable system SOPC believes according to the cable propagation of electrical signals speed to be measured of outside input
Breath calculates trouble point distance.
Preferably, the pulses generation module produces the test pulse signal of corresponding pulsewidth according to measuring distance, wherein surveying
Examination distance and pulsewidth corresponding relation be：Measuring distance<At 10 meters, pulsewidth is 10ns；When 10 meters<Measuring distance<At 50 meters,
Pulsewidth is 20ns；When 50 meters<Measuring distance<At 100 meters, pulsewidth is 50ns；When 100 meters<Measuring distance<At 500 meters, pulsewidth is
500ns；When 500 meters<Measuring distance<At 1000 meters, pulsewidth is 1 microsecond.
Preferably, described upper programmable system SOPC is adjusted to the sample frequency of the sampling clock of AD sampling control modules
Mode is：Work as measuring distance<At 10 meters, the frequencies of 4 road sampling clocks is 100M, sampling clock phase skew be followed successively by 0 degree,
90 degree, 180 degree and 270 degree, and by Waveform composition, realize 400M equivalent sampling；When 10 meters<Measuring distance<At 50 meters,
200M equivalent sampling is realized for the wherein 2 road 100M sampling clocks of 180 degree by phase difference；When 50 meters<Measuring distance<100
Meter Shi, using wherein 100M sampling clock realizes 200M equivalent sampling all the way；When 100 meters<Measuring distance<At 500 meters,
Using wherein 50M sampling clock realizes 50M equivalent sampling all the way；When 500 meters<Measuring distance<At 1000 meters, using wherein
25M sampling clock realizes 25M equivalent sampling all the way.
Further, in addition to range amplifier circuit and amplitude fading circuit；Wherein range amplifier circuit is realized to test
The amplification of pulse signal；Adjustable attenuation of the amplitude fading circuit realiration to echo pulse signal in cable.
Further, the hand-held set includes TFT color screen (6), and display content includes test waveform, fault type, failure
Distance, test velocity of wave, screen locking signal.
Further, set velocity of wave that button (7) is set on the hand-held set, passed for electric signal in user's input cable
Speed is broadcast, and sends into programmable system SOPC on piece.
Further, ranging rotary switch (8) is set on the hand-held set, length of cable is inputted for user.
Further, screen locking button (9) is set on the hand-held set, for realizing the locking to TFT color screen (6).
Further, in addition to power module, the voltage output for realizing 5V and 3.3V.
Further, in addition to test cable, one end of the preceding termination p-wire cable of the tested cable, test cable
Another termination bnc interface.
Preferably, the arteries and veins that amplitude control module is exported on piece under programmable system SOPC control to pulse choice module
Rush signal and enter the mode of line amplitude enhanced processing and be：Work as measuring distance<At 10 meters, amplitude control module to test pulse signal not
Effect；10 meters<Measuring distance<At 50 meters, test pulse amplitude is enlarged into 6V by amplitude control module；When 50 meters<Measuring distance<
At 100 meters, transmitting impulse amplitude will be enlarged into 10V by amplitude control module；When 100 meters<Measuring distance<At 500 meters, it will launch
Impulse amplitude is enlarged into 15V；When 500 meters<Measuring distance<At 1000 meters, transmitting impulse amplitude is enlarged into 20V.
Preferably, amplitude control module carries out attenuation processing to reflected signal, reflected signal is set to decay to AD sampling A/D chips
Test scope in, i.e., -500 millivolts~500 millivolts.
The utility model has the advantages that：
1) measuring distance of cable to be measured is manually selected by rotary switch, the test that can effectively solve bifurcated cable is asked
Topic.
2) high-speed sampling is realized by 4 passage AD9288 chips, improves the stability of positioning precision and system；
3) by setting 3 meters of test extended lines to improve short-range fault location precision, the survey of testing blind zone is effectively solved
Why inscribe.
4) by setting screen locking button, test data can be latched in real time, facilitate user record test result.Particularly pair
In sporadic, intermittent defect, once there is test result, user can carry out a key-lock screen, record test result.
Brief description of the drawings
Fig. 1 is the composition frame chart of hand-held cable automatic trouble locating arrangement of the present utility model；
Fig. 2 (a) is the graph of a relation of transmitting pulse and reflected impulse when cable fault type is open circuit in the utility model；
Fig. 2 (b) is the graph of a relation of transmitting pulse and reflected impulse when cable fault type is open circuit in the utility model；
Fig. 3 is test cable and tested cable connection diagram in the utility model；
Fig. 4 is the schematic appearance of the utility model hand-held cable automatic trouble locating arrangement.
Embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
As shown in figs. 1 and 4, a kind of hand-held cable automatic trouble locating arrangement of the present utility model, including its internal control
Circuit and hand-held set processed；Wherein, internal control circuit includes programmable system SOPC, FPGA control logic module, 4 on piece
Passage modulus acquisition module and test signal amplitude control module；Hand-held set includes housing and the TFT being arranged on housing
Color screen, velocity of wave set button, ranging rotary switch, screen locking button, rechargable power supplies module, BNC test interfaces and p-wire.
Wherein p-wire is that length is 3 meters of BNC p-wires.
The FPGA control logic modules include pulses generation module, pulse choice module, AD sampling control modules and
FIFO memory modules；
The pulses generation module produces the test pulse signal for a variety of pulsewidths that test may be required；Pulses generation module
Main 10ns (the measuring distances produced needed for test<At 10 meters), (10 meters of 20ns<Measuring distance<At 50 meters), (50 meters of 50ns
<Measuring distance<At 100 meters), (100 meters of 500ns<Measuring distance<At 500 meters), (500 meters of 1 microsecond pulse<Measuring distance<
At 1000 meters).
A variety of tests that pulse choice module is produced on piece under programmable system SOPC control to pulses generation module
A kind of output of pulse signal selection；Wherein sample frequency adjustment strategy be：4 road 100M (measuring distances<At 10 meters), 2 tunnels
(10 meters of 100M<Measuring distance<At 50 meters), (50 meters of single channel 100M<Measuring distance<100 meters), (100 meters of single channel 50M<Test away from
From<At 500 meters), (500 meters of single channel 25M<Measuring distance<At 1000 meters).
The pulse that the amplitude control module is exported on piece under programmable system SOPC control to pulse choice module
Signal enters line amplitude enhanced processing, and the test pulse signal after processing is linked into tested cable by bnc interface；Meanwhile,
Amplitude control module is on piece to being carried out from the reflected signal of tested cable reception at decay under programmable system SOPC control
Reason, and the reflected signal after processing is sent into 4 passage modulus acquisition modules；
The AD sampling control modules export 4 road phase differences on piece under programmable system SOPC control be 90 degree and frequency
The adjustable sampling clock of rate；
The control for the 4 road sampling clocks that the 4 passage modulus acquisition module is exported according to AD sampling control modules, it is right successively
The reflected signal of test pulse signal and cable is acquired, and finally enters the signal data feeding FIFO memory modules of collection
Row storage；Programmable system SOPC is to the sample frequency adjustment mode of the sampling clock of AD sampling control modules on described：
Work as measuring distance<At 10 meters, the frequencies of 4 road sampling clocks is 100M, sampling clock phase skew be followed successively by 0 degree, 90 degree,
180 degree and 270 degree, and by Waveform composition, realize 400M equivalent sampling；When 10 meters<Measuring distance<At 50 meters, pass through phase
Potential difference realizes 200M equivalent sampling for the wherein 2 road 100M sampling clocks of 180 degree；When 50 meters<Measuring distance<At 100 meters,
Using wherein 100M sampling clock realizes 200M equivalent sampling all the way；When 100 meters<Measuring distance<At 500 meters, using it
In the sampling clock of 50M all the way realize 50M equivalent sampling；When 500 meters<Measuring distance<At 1000 meters, using wherein all the way
25M sampling clock realizes 25M equivalent sampling.
The FIFO memory modules are used to store test pulse signal and reflected signal；
Described upper programmable system SOPC is used for：
Pulse choice module in the state modulator FPGA control logic modules inputted according to ranging rotary switch exports system
The test pulse signal of fixed width degree and frequency；The FIFO memory module data in FPGA control logic modules are read, by hits
Shown according to TFT color screen is sent to；By the analysis to FIFO data storages, it is that open circuit is gone back to judge cable fault type to be measured
It is short circuit, and set the cable propagation of electrical signals velocity information to be measured of key-press input to calculate trouble point distance according to velocity of wave.
1) fault type automatic decision process：
During test, test equipment emission maximum is ymax1Test pulse, be in fault point reflected impulse maximum
ymax2, minimum value is ymin2If, | ymax2| ＞ | ymin2|, now shown in reflection configuration such as Fig. 2 (a), then it is assumed that fault type is to open
Road；If | ymax2| ＜ | ymin2|, now shown in reflection configuration such as Fig. 2 (b), then it is assumed that fault type is short circuit.
2) position of failure point automatic positioning method
As it was previously stated, when judging fault type, record transmitting pulse maximum ymax1Corresponding timing node tmax1,
And reflected impulse maximum ymax2Correspondence timing node tmax2, reflected impulse minimum value ymin2Correspondence timing node tmin2.It is known
3 meters of line length is tested, distance tested testing lines end distance in trouble point is l, as shown in Figure 3.
If test signal round trip takes T1 on 3m p-wires, T2, and known p-wire are taken on tested cable
Velocity of wave be v0, it is v to be tested cable velocity of wave.When then meeting open circuit,
Then the distance at trouble point distance test end is obtained：
It can similarly obtain, fault distance is when short-circuitWherein, v represents the velocity of wave of the cable, v0
Represent the velocity of wave of p-wire, the light velocity of 0.6 times of standard value position, i.e. 0.6c.
The test signal amplitude control module includes range amplifier circuit and amplitude fading circuit, range amplifier circuit base
In high-frequency triode design, the amplification to test pulse signal is realized using the switching characteristic of triode, to ensure in cable
Test pulse signal is enough to reach setpoint distance；Amplitude fading circuit is designed based on scaling circuit, is realized to being returned in cable
The adjustable attenuation of wave pulse signal, to ensure echo-signal in the test scope of sampling module, i.e., -500 millivolts~500 millis
Volt.
The TFT color screen shown using 2.8 cun of TFT color screens, display content include test waveform, fault type, failure away from
From, test velocity of wave, screen locking signal.
The velocity of wave sets button to control velocity of wave to add and subtract by the button of left and right two, and default value is 0.6 times of light velocity.For ripple
The uncertain cable to be measured of speed can look for the intact molded line cable, first measure its length L, then carry out fault test to it；
Button is set to adjust velocity of wave by velocity of wave in test process, until fault distance is equal to L, velocity of wave now is the molded line cable
Velocity of wave.
The optional length of ranging rotary switch is respectively 10 meters, 50 meters, 100 meters, 500 meters, 1000 meters.The function can be right
The region to be measured of cable is configured, you can to increase the flexibility of testing lines, can carry out subregion measurement to bifurcated cable again.
The screen locking button realizes that real-time read of programmable system SOPC should on the locking to screen, piece by self-locking button
Key-press status, when the switch is closed, stops refreshing screen, facilitates user record to test information.
The power module is powered using 4 section chargeable lithium cells, is charged by MiniUSB, built-in voltage modular converter,
Programmable system SOPC, FPGA control logic modules, 4 passage modulus acquisition modules, boosting on synchronism output 5V, 3.3V, feed
Module, TFT color screen are used.
In summary, preferred embodiment of the present utility model is these are only, is not intended to limit of the present utility model
Protection domain.It is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements made etc. all should be wrapped
It is contained within protection domain of the present utility model.
Claims (13)
1. a kind of cable automatic trouble locating arrangement, including hand-held set and internal control circuit, it is characterised in that the internal control
Circuit processed includes programmable system SOPC, FPGA control logic module on piece, amplitude control module and 4 passage moduluses collection mould
Block；
The FPGA control logic modules include pulses generation module, pulse choice module, AD sampling control modules and FIFO
Memory module；
The pulses generation module produces the test pulse signal for a variety of pulsewidths that test may be required；Pulse choice module is in piece
The a variety of test pulse signal behaviors one kind produced under upper programmable system SOPC control to pulses generation module is exported；
The pulse signal that the amplitude control module is exported on piece under programmable system SOPC control to pulse choice module
Enter line amplitude enhanced processing, and the test pulse signal after processing is linked into tested cable by bnc interface；
The AD sampling control modules export 4 road phase differences under programmable system SOPC control on piece for 90 degree and frequency can
The sampling clock of tune；
The control for the 4 road sampling clocks that the 4 passage modulus acquisition module is exported according to AD sampling control modules, successively to test
The reflected signal of pulse signal and cable is acquired, and is finally deposited the signal data feeding FIFO memory modules of collection
Storage；
The FIFO memory modules are used to store test pulse signal and reflected signal；
Described upper programmable system SOPC is used for the test pulse signal and reflected signal number for reading the FIFO memory modules
According to it is open circuit or short circuit to judge cable fault type to be measured.
2. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that described upper programmable system
SOPC calculates trouble point distance according to the cable propagation of electrical signals velocity information to be measured of outside input.
3. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that the pulses generation module root
The test pulse signal of corresponding pulsewidth is produced according to measuring distance, the corresponding relation of wherein measuring distance and pulsewidth is：Measuring distance<
At 10 meters, pulsewidth is 10ns；When 10 meters<Measuring distance<At 50 meters, pulsewidth is 20ns；When 50 meters<Measuring distance<At 100 meters,
Pulsewidth is 50ns；When 100 meters<Measuring distance<At 500 meters, pulsewidth is 500ns；When 500 meters<Measuring distance<At 1000 meters, arteries and veins
A width of 1 microsecond.
4. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that described upper programmable system
SOPC is to the sample frequency adjustment mode of the sampling clock of AD sampling control modules：Work as measuring distance<At 10 meters, the sampling of 4 tunnels
The frequency of clock is 100M, and sampling clock phase skew is followed successively by 0 degree, 90 degree, 180 degree and 270 degree, and is closed by waveform
Into realizing 400M equivalent sampling；When 10 meters<Measuring distance<At 50 meters, adopted by phase difference for the wherein 2 road 100M of 180 degree
Sample clock realizes 200M equivalent sampling；When 50 meters<Measuring distance<At 100 meters, using wherein 100M sampling clock is real all the way
Existing 200M equivalent sampling；When 100 meters<Measuring distance<At 500 meters, using wherein 50M sampling clock realizes 50M's all the way
Equivalent sampling；When 500 meters<Measuring distance<At 1000 meters, using wherein 25M sampling clock realizes that the equivalent of 25M is adopted all the way
Sample.
5. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that also including range amplifier circuit
With amplitude fading circuit；Wherein range amplifier circuit realizes the amplification to test pulse signal；The amplitude fading circuit realiration
To the adjustable attenuation of echo pulse signal in cable.
6. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that the hand-held set includes TFT
Color screen (6), display content includes test waveform, fault type, fault distance, test velocity of wave, screen locking signal.
7. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that ripple is set on the hand-held set
Speed sets button (7), for propagation of electrical signals speed in user's input cable, and sends into programmable system SOPC on piece.
8. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that set and survey on the hand-held set
Away from rotary switch (8), length of cable is inputted for user.
9. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that lock is set on the hand-held set
Shield button (9), for realizing the locking to TFT color screen (6).
10. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that also including power module, is used
In the voltage output for realizing 5V and 3.3V.
11. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that also including test cable, institute
One end of the preceding termination p-wire cable of tested cable is stated, another termination bnc interface of cable is tested.
12. a kind of cable automatic trouble locating arrangement as claimed in claim 1, it is characterised in that amplitude control module is in piece
It is to the mode that the pulse signal that pulse choice module is exported enters line amplitude enhanced processing under upper programmable system SOPC control：
Work as measuring distance<At 10 meters, amplitude control module is not acted on test pulse signal；10 meters<Measuring distance<At 50 meters, amplitude
Test pulse amplitude is enlarged into 6V by control module；When 50 meters<Measuring distance<At 100 meters, amplitude control module will will launch arteries and veins
The amplitude of punching is enlarged into 10V；When 100 meters<Measuring distance<At 500 meters, transmitting impulse amplitude is enlarged into 15V；When 500 meters<Test
Distance<At 1000 meters, transmitting impulse amplitude is enlarged into 20V.
13. a kind of cable automatic trouble locating arrangement as claimed in claim 5, it is characterised in that amplitude control module is to anti-
Penetrate signal and carry out attenuation processing, reflected signal is decayed in the test scope of AD sampling A/D chips, i.e., -500 millivolts~500 millis
Volt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362141.9U CN206450782U (en) | 2016-12-12 | 2016-12-12 | A kind of hand-held cable automatic trouble locating arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362141.9U CN206450782U (en) | 2016-12-12 | 2016-12-12 | A kind of hand-held cable automatic trouble locating arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN206450782U true CN206450782U (en) | 2017-08-29 |
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ID=59662385
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679127A (en) * | 2020-06-11 | 2020-09-18 | 江苏华创微系统有限公司 | High-speed digital electric connection channel impedance on-line monitoring method |
-
2016
- 2016-12-12 CN CN201621362141.9U patent/CN206450782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679127A (en) * | 2020-06-11 | 2020-09-18 | 江苏华创微系统有限公司 | High-speed digital electric connection channel impedance on-line monitoring method |
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