CN109884450A - A kind of device and method detecting transponder cable status - Google Patents
A kind of device and method detecting transponder cable status Download PDFInfo
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Abstract
The present invention relates to a kind of device and methods for detecting transponder cable status, wherein, described device includes signal acquisition module, signal processing module and discriminatory analysis module, the input of signal acquisition module is the C interface of LEU, for acquiring C6 voltage signal and C6 current signal, the output end of signal acquisition module is connected to the input terminal of the signal processing module, signal processing module is used to handle the C6 voltage signal and C6 current signal of the acquisition, and corresponding square-wave signal is exported respectively, the output end of signal processing module is connected to the input terminal of the discriminatory analysis module, discriminatory analysis module is for analyzing the square-wave signal, and provide discriminatory analysis result.Compared with prior art, the cable for the detection different distance length that the present invention can not only be adaptive, moreover it is possible to detect the normal of cable, open circuit and short-circuit condition.
Description
Technical field
The present invention relates to cable detection technical fields, more particularly, to a kind of device for detecting transponder cable status and side
Method.
Background technique
In high-speed railway control system, the correctness of transponder transmission information is directly related to the driving of bullet train
Safety.The transmission of the information of transponder and train controlling center relies primarily on LEU (trackside electronic unit) progress, and transponder is by answering
It answers device cable to connect with LEU, in practical applications, once transponder cable breaks down, such as open circuit or short circuit, will lead to
Train controlling center promptly and accurately can not receive transponder information, influence the control and operation of train.Therefore it needs to correspond to
The state for answering device cable is detected to debug early, due to the complexity of engineering design, so that cable distance length
At the scene widely different, and traditional cable status detection technique is primarily present following defect:
One, long-distance cable or short distance cable can only be detected, detection long range and short distance cable can not be had both.
Two, it can only detect normally and malfunction, indistinguishable long-distance cable open circuit and short distance cable are short-circuit.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of detection transponder electricity
The device and method of cable state, the cable of detection different distance length that can not only be adaptive, moreover it is possible to detect cable it is normal,
Open circuit and short-circuit condition.
The purpose of the present invention can be achieved through the following technical solutions: a kind of device detecting transponder cable status,
Including signal acquisition module, signal processing module and discriminatory analysis module, the C that the input of the signal acquisition module is LEU is connect
Mouthful, the output end of the signal acquisition module is connected to the input terminal of the signal processing module, the signal processing module
Output end is connected to the input terminal of the discriminatory analysis module；
The signal acquisition module is for acquiring C6 voltage signal and C6 current signal；
The signal processing module is used to handle the C6 voltage signal and C6 current signal of the acquisition, and output pair respectively
The square-wave signal answered；
The discriminatory analysis module provides discriminatory analysis result for analyzing the square-wave signal.
Preferably, the signal processing module includes first comparator, the second comparator and third comparator, and described first
Comparator is for converting the C6 voltage signal and exporting corresponding first square-wave signal, and second comparator is for converting institute
It states C6 current signal and exports corresponding second square-wave signal, the third comparator is for converting the C6 current signal and defeated
Corresponding third square-wave signal out.
Preferably, the discriminatory analysis module uses programmable logic device.
Preferably, the programmable logic device is fpga chip.
The present invention also provides a kind of methods for detecting transponder cable status, comprising:
Step 1, acquisition C6 voltage signal and C6 current signal；
Step 2, the C6 voltage signal and C6 current signal acquired in the step 1 is handled；
Step 3, judge cable apart from length, if being judged as short distance cable, then follow the steps 4, if be judged as it is long away from
From cable, 5 are thened follow the steps；
Step 4, the state of short distance cable is analyzed；
Step 5, the state of long-distance cable is analyzed.
Further, the processing C6 voltage signal in the step 2 and C6 current signal, specifically: convert the step 1
The C6 voltage signal of middle acquisition simultaneously exports corresponding first square-wave signal, while converting the C6 electric current letter acquired in the step 1
Number and export corresponding second square-wave signal and third square-wave signal.
Further, in the step 3 judge cable apart from length, specifically: calculate first in the step 2
The pulsewidth of first square-wave signal is compared by the pulsewidth of square-wave signal with the first preset threshold, if first square wave
The pulsewidth of signal is then judged as short distance cable less than the first preset threshold, if the pulsewidth of first square-wave signal be greater than or
Equal to the first preset threshold, then it is judged as long-distance cable.
Further, in the case where being judged as short distance cable, the shape of the analysis short distance cable in the step 4
State specifically includes:
Step 4.1, it detects whether there are the second square-wave signal, if inspection does not measure the second square-wave signal, judges described short
It is open-circuit condition apart from cable, it is no to then follow the steps 4.2；
Step 4.2, the pulsewidth for calculating the second square-wave signal, by the pulsewidth of second square-wave signal and the second preset threshold
It is compared, if the pulsewidth of second square-wave signal less than the second preset threshold, judges that the short distance cable is normal
State judges the short distance cable to be short if the pulsewidth of second square-wave signal is greater than or equal to the second preset threshold
Line state.
Further, in the case where being judged as long-distance cable, the shape of the analysis long-distance cable in the step 5
State specifically includes:
Step 5.1, according to the front and back difference interval of the second square-wave signal and third square-wave signal, comparison voltage phase and electricity
Phase is flowed, if the voltage-phase lagging current phase, judges the long-distance cable for short-circuit condition, if voltage-phase is super
Preceding current phase, thens follow the steps 5.2；
Step 5.2, the time width for calculating the voltage-phase leading current phase, the time width and third is pre-
If threshold value is compared, if the time width be less than third predetermined threshold value, judge the long-distance cable for normal condition,
If the time width is greater than or equal to third predetermined threshold value, judge the long-distance cable for open-circuit condition.
Compared with prior art, the invention has the following advantages:
One, can voluntarily judge cable apart from length, do not need in addition to add other auxiliary devices, reduce installation dimension
Protect difficulty.
Two, it can be compared with the traditional method, be improved according to the analysis for adaptively carrying out cable status apart from length of cable
The accuracy of cable status judgement, at the same can detect differentiation cable it is normal, open a way and short-circuit condition.
Three, detection method provided by the invention is based on comparator and programmable logic device realizes that real-time is good, Neng Gou
The state of cable is judged in short time.
Detailed description of the invention
Fig. 1 is the device of the invention structural schematic diagram；
Fig. 2 is the circuit connection diagram of the embodiment of the present invention；
Fig. 3 is method flow schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
As shown in Figure 1, a kind of device for detecting transponder cable status, including signal acquisition module, signal processing module
And discriminatory analysis module, wherein the input of signal acquisition module is the C interface of LEU, and the output end of signal acquisition module is connected to
The input terminal of signal processing module, the output end of signal processing module are connected to the input terminal of discriminatory analysis module.
Signal acquisition module is for acquiring C6 voltage signal and C6 current signal；
Signal processing module is used to handle the C6 voltage signal and C6 current signal of the acquisition, and exports respectively corresponding
Square-wave signal；
Discriminatory analysis module provides discriminatory analysis result for analyzing square-wave signal.
The device circuit connection relationship of the present embodiment between transponder and LEU by transponder cable as shown in Fig. 2, connected
It connects, the C interface of LEU is connected to signal acquisition module, acquires C6 voltage signal and C6 current signal, signal by signal acquisition module
It include a sampling resistor R in acquisition module, one end of sampling resistor R connects C6 current signal, other end ground connection.
Signal processing module includes first comparator, the second comparator and third comparator, and first comparator is for converting
C6 voltage signal simultaneously exports corresponding first square-wave signal V-C6-REF, and the second comparator is for converting C6 current signal and exporting
Corresponding second square-wave signal V-C6, third comparator is for converting C6 current signal and exporting corresponding third square-wave signal I-
C6.The output end of first comparator, the second comparator and third comparator is all connected to
Discriminatory analysis module uses fpga chip, for the first square-wave signal V-C6-REF, the second square-wave signal V-C6
Calculating analysis is carried out with third square-wave signal I-C6.
The method that Fig. 3 show a kind of detection transponder cable status based on the present embodiment device, comprising:
Step 1, acquisition C6 voltage signal and C6 current signal；
Step 2, the C6 voltage signal and C6 current signal acquired in the step 1 is handled；
Step 3, judge cable apart from length, if being judged as short distance cable, then follow the steps 4, if be judged as it is long away from
From cable, 5 are thened follow the steps；
Step 4, the state of short distance cable is analyzed；
Step 5, the state of long-distance cable is analyzed.
Wherein, C6 voltage signal and C6 current signal, detailed process are handled in step 2 are as follows: conversion C6 voltage signal is simultaneously defeated
Corresponding first square-wave signal V-C6-REF out, at the same convert C6 current signal and export corresponding second square-wave signal V-C6 and
Third square-wave signal I-C6；
Judge in step 3 cable apart from length, detailed process are as follows: calculate the first square-wave signal V-C6-REF pulsewidth,
The pulsewidth of V-C6-REF is compared with the first preset threshold, if the pulsewidth of V-C6-REF is less than the first preset threshold N-
DOOR1 is then judged as short distance cable, if the pulsewidth of V-C6-REF is greater than or equal to the first preset threshold N-DOOR1, judges
For long-distance cable.
The state of analysis short distance cable in step 4, specifically includes:
Step 4.1, it detects whether there are the second square-wave signal V-C6, if inspection does not measure V-C6, judges short distance cable
It is no to then follow the steps 4.2 for open-circuit condition；
Step 4.2, the pulsewidth for calculating the second square-wave signal V-C6, by the pulsewidth of V-C6 and the second preset threshold N-DOOR2
It is compared, if the pulsewidth of V-C6 less than the second preset threshold N-DOOR2, judges short distance cable for normal condition, if V-
The pulsewidth of C6 is greater than or equal to the second preset threshold N-DOOR2, then judges short distance cable for short-circuit condition.
The state of analysis long-distance cable in step 5, specifically includes:
Step 5.1, according to the front and back difference interval of the second square-wave signal V-C6 and third square-wave signal I-C6, comparison voltage
Phase and current phase judge long-distance cable for short-circuit condition, if voltage-phase is super if voltage-phase lagging current phase
Preceding current phase, thens follow the steps 5.2；
Step 5.2, the time width for calculating voltage-phase leading current phase, by the time width and third predetermined threshold value
It is compared, if time width is less than third predetermined threshold value N-DOOR3, judges long-distance cable for normal condition, if the time
Width is greater than or equal to third predetermined threshold value N-DOOR3, then judges long-distance cable for open-circuit condition.
The principle of detection method provided in this embodiment includes three aspects, and first aspect is to judge cable distance length,
Second aspect is to analyze the state of short distance cable, and the third aspect is to analyze the state of long-distance cable:
One, when cable distance is shorter, entire cable resistance and mutual inductor impedance Incomplete matching cause C6 electric
Press signal less than normal, when cable distance is long, entire cable resistance is matched with mutual inductor impedance comparison, leads to C6 voltage
Signal is bigger than normal, therefore, the pulsewidth of square-wave signal V-C6-REF is corresponded to by calculating C6 voltage signal, by the pwm value and default threshold
Value N-DOOR1 is compared, can judge cable apart from length；
Two, for short distance cable, C6 current signal is almost 0 when open-circuit condition, therefore C6 current signal corresponds to square wave
Signal V-C6 will be unable to be detected, and C6 current signal exists when normal condition and short-circuit condition, C6 electricity when difference is short circuit
Flowing signal can be very big, therefore the pulsewidth of square-wave signal V-C6 is corresponded to by calculating C6 current signal, by the pulsewidth and default threshold
Value N-DOOR2 is compared, and cable status can be judged for normal or short circuit；
Three, for long-distance cable, voltage-phase lagging current phase when short-circuit condition, when normal condition and open-circuit condition
The equal leading current phase of voltage-phase, the time width of voltage-phase leading current phase is very big when difference is open circuit, therefore
By the time width of calculating voltage-phase leading current phase, which is compared with preset threshold N-DOOR3,
Cable status can be judged for normal or open circuit.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (9)
1. a kind of device for detecting transponder cable status, including signal acquisition module, signal processing module and discriminatory analysis mould
Block, the input of the signal acquisition module are the C interface of LEU, and the output end of the signal acquisition module is connected to the signal
The input terminal of processing module, the output end of the signal processing module are connected to the input terminal of the discriminatory analysis module；
The signal acquisition module is for acquiring C6 voltage signal and C6 current signal；
The signal processing module is used to handle the C6 voltage signal and C6 current signal of the acquisition, and exports respectively corresponding
Square-wave signal；
The discriminatory analysis module provides discriminatory analysis result for analyzing the square-wave signal.
2. a kind of device for detecting transponder cable status according to claim 1, which is characterized in that the signal processing
Module includes first comparator, the second comparator and third comparator, and the first comparator is for converting the C6 voltage letter
Number and export corresponding first square-wave signal, second comparator is for converting the C6 current signal and exporting corresponding the
Two square-wave signals, the third comparator is for converting the C6 current signal and exporting corresponding third square-wave signal.
3. a kind of device for detecting transponder cable status according to claim 1, which is characterized in that the discriminatory analysis
Module uses programmable logic device.
4. a kind of device for detecting transponder cable status according to claim 3, which is characterized in that described may be programmed is patrolled
Collecting device is fpga chip.
5. a kind of method for detecting transponder cable status, comprising:
Step 1, acquisition C6 voltage signal and C6 current signal；
Step 2, the C6 voltage signal and C6 current signal acquired in the step 1 is handled；
Step 3, judge cable apart from length, if being judged as short distance cable, then follow the steps 4, if be judged as over long distances electricity
Cable thens follow the steps 5；
Step 4, the state of short distance cable is analyzed；
Step 5, the state of long-distance cable is analyzed.
6. a kind of method for detecting transponder cable status according to claim 5, which is characterized in that in the step 2
Processing C6 voltage signal and C6 current signal, specifically: convert the C6 voltage signal acquired in the step 1 and export correspondence
The first square-wave signal, while convert the C6 current signal acquired in the step 1 and export corresponding second square-wave signal and
Third square-wave signal.
7. a kind of method for detecting transponder cable status according to claim 6, which is characterized in that in the step 3
Judge cable apart from length, specifically: the pulsewidth for calculating the first square-wave signal in the step 2, by the first party
The pulsewidth of wave signal is compared with the first preset threshold, if the pulsewidth of first square-wave signal less than the first preset threshold,
Then it is judged as short distance cable, if the pulsewidth of first square-wave signal is greater than or equal to the first preset threshold, is judged as long
Apart from cable.
8. a kind of method for detecting transponder cable status according to claim 6, which is characterized in that in the step 4
Analysis short distance cable state, specifically include:
Step 4.1, it detects whether there are the second square-wave signal, if inspection does not measure the second square-wave signal, judges the short distance
Cable is open-circuit condition, no to then follow the steps 4.2；
Step 4.2, the pulsewidth for calculating the second square-wave signal carries out the pulsewidth of second square-wave signal and the second preset threshold
Compare, if the pulsewidth of second square-wave signal less than the second preset threshold, judge the short distance cable for normal condition,
If the pulsewidth of second square-wave signal is greater than or equal to the second preset threshold, judge the short distance cable for short-circuit shape
State.
9. a kind of method for detecting transponder cable status according to claim 6, which is characterized in that in the step 5
Analysis long-distance cable state, specifically include:
Step 5.1, according to the front and back difference interval of the second square-wave signal and third square-wave signal, comparison voltage phase and electric current phase
Position, if the voltage-phase lagging current phase, judges the long-distance cable for short-circuit condition, if voltage-phase is electric in advance
Phase is flowed, thens follow the steps 5.2；
Step 5.2, the time width and third are preset threshold by the time width for calculating the voltage-phase leading current phase
Value is compared, if the time width is less than third predetermined threshold value, judges the long-distance cable for normal condition, if institute
Time width is stated more than or equal to third predetermined threshold value, then judges the long-distance cable for open-circuit condition.
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Cited By (4)
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| CN110928274A (en) * | 2019-12-09 | 2020-03-27 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Test system of LEU equipment |
| CN112653690A (en) * | 2020-12-18 | 2021-04-13 | 卡斯柯信号有限公司 | Analog demodulation circuit for acquiring message by C interface of ground electronic unit |
| CN112653088A (en) * | 2020-12-17 | 2021-04-13 | 卡斯柯信号有限公司 | Transponder cable self-adaptive short-circuit protection method of ground electronic unit |
| CN113741399A (en) * | 2021-09-14 | 2021-12-03 | 北京铁路信号有限公司 | Test equipment and method |
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| CN112653088A (en) * | 2020-12-17 | 2021-04-13 | 卡斯柯信号有限公司 | Transponder cable self-adaptive short-circuit protection method of ground electronic unit |
| CN112653088B (en) * | 2020-12-17 | 2022-08-30 | 卡斯柯信号有限公司 | Transponder cable self-adaptive short-circuit protection method of ground electronic unit |
| CN112653690A (en) * | 2020-12-18 | 2021-04-13 | 卡斯柯信号有限公司 | Analog demodulation circuit for acquiring message by C interface of ground electronic unit |
| CN112653690B (en) * | 2020-12-18 | 2022-07-26 | 卡斯柯信号有限公司 | Analog demodulation circuit for acquiring message by C interface of ground electronic unit |
| CN113741399A (en) * | 2021-09-14 | 2021-12-03 | 北京铁路信号有限公司 | Test equipment and method |
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