CN103840836A - Optical fiber signal code identification method and system of cable type fault indicator - Google Patents
Optical fiber signal code identification method and system of cable type fault indicator Download PDFInfo
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- CN103840836A CN103840836A CN201410076401.5A CN201410076401A CN103840836A CN 103840836 A CN103840836 A CN 103840836A CN 201410076401 A CN201410076401 A CN 201410076401A CN 103840836 A CN103840836 A CN 103840836A
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Abstract
The invention discloses an optical fiber signal code identification method and system of a cable type fault indicator. The optical fiber signal code identification method comprises the steps that the mutant rising edge or the mutant falling edge of an optical fiber signal is taken as the pulse period of optical fiber signal identification triggering by a signal sending end; logic level coding is conducted on the optical fiber signal according to the pulse period of each pulse of the optical fiber signal by the signal sending end, and the coded optical fiber signal is sent to a signal receiving end; the signal receiving end detects the logic level of the optical fiber signal according to the pulse periods and identifies the optical fiber signal. The optical fiber signal code identification method and system have the advantages that influence of the difference of components under high temperature and low temperature is avoided, the data identification accuracy is improved, negative logic level influences caused when the rising edge and the falling edge are too smooth are avoided, hardware difference is effectively eliminated, and the error rate is decreased; the obvious difference between the logic one and the logic zero is guaranteed, it is guaranteed that continuous occurrence of two high levels is avoided, the lighting time is effectively shortened on the premise that the signal is transmitted reliably, the purpose of saving electricity is achieved, and the service life of a battery power supply device is prolonged.
Description
Technical field
The present invention relates to field of signal transmissions, relate in particular to a kind of fiber-optic signal code recognition method and system of cable-type fault detector.
Background technology
The coded system of common fiber-optic signal have Manchester's code and by turn coding etc., these coded systems are applicable to high speed transmission of signals, General Requirements agreement is simple, require in the environment of power saving, but components and parts is vulnerable to the impact of high low temperature.At present, the mode of fiber-optic signal identification is identified for trailing edge or the milder level of rising edge, because milder level has reduced the precision of data identification, the error rate is higher like this.
Summary of the invention
The technical problem to be solved in the present invention is, is subject to high low temperature effect and the high defect of the error rate for prior art components and parts, and a kind of fiber-optic signal code recognition method and system of cable-type fault detector is provided.
The technical solution adopted for the present invention to solve the technical problems is: the fiber-optic signal code recognition method that a kind of cable-type fault detector is provided, described cable-type fault detector comprises the signal sending end and the signal receiving end that connect by optical fiber, said method comprising the steps of:
S1. described signal sending end is using the rising edge suddenling change in described fiber-optic signal or trailing edge as the pulse period of triggering the described fiber-optic signal of identification;
S2. described signal sending end carries out logic level coding according to the pulse period of each pulse of fiber-optic signal to fiber-optic signal, and the fiber-optic signal after coding is sent to signal receiving end;
S3. described signal receiving end detected the logic level of described fiber-optic signal and identifies described fiber-optic signal according to the described pulse period.
Preferably, described signal sending end specifically comprises the rising edge suddenling change in described fiber-optic signal or trailing edge as the method for the pulse period of triggering the described fiber-optic signal of identification:
Identify the rising edge of a sudden change in described fiber-optic signal or trailing edge to the signal between rising edge or the trailing edge of next sudden change as a pulse period, and judge that the described pulse period comprises unit pulsewidth number.
The method of preferably, according to the pulse period of each pulse of fiber-optic signal, fiber-optic signal being carried out to logic level coding specifically comprises:
In the time that the described pulse period has Liang Ge unit's pulsewidth, be encoded to logic low 0;
In the time that the described pulse period has three unit pulsewidths, be encoded to logic high 1.
Preferably, the unit pulse width of described pulse period is 300us.
Preferably, described signal sending end is probe.
Preferably, described signal receiving end is indication panel or communication terminal.
The present invention also constructs a kind of fiber-optic signal code recognition system of cable-type fault detector, described cable-type fault detector comprises the signal sending end and the signal receiving end that connect by optical fiber, described signal sending end comprises identification module and coding module, and described signal receiving end comprises detection module;
Identification module, is connected with described coding module, and the rising edge described fiber-optic signal being suddenlyd change for described signal sending end or trailing edge are as the pulse period of triggering the described fiber-optic signal of identification;
Coding module, carries out logic coding according to the pulse period of each pulse of fiber-optic signal to fiber-optic signal for described signal sending end, and the fiber-optic signal after coding is sent to signal receiving end;
Detection module, with described identification module communication connection, for detecting the logic level of described fiber-optic signal according to the described pulse period and identifying described fiber-optic signal.
Preferably, described signal sending end is probe.
Preferably, described signal receiving end is indication panel or communication terminal.
Implement technical scheme of the present invention, there is following beneficial effect: the rising edge suddenling change in employing fiber-optic signal or trailing edge are as the pulse period of triggering identification fiber-optic signal, and according to the logic level of pulse period detection fiber signal, the impact of effectively having avoided the difference of components and parts under high temperature and low temperature to bring, effectively improve the precision of data identification, simultaneously, the bad logic level impact of having avoided rising edge and trailing edge too smoothly to bring, effectively get rid of hardware differences, significantly reduced the error rate; According to the pulse width period of fiber-optic signal, fiber-optic signal is encoded, guarantee the notable difference of logical one and logical zero, and having guaranteed does not have continuing of twice high level, guaranteeing that signal transmits under reliable prerequisite, effectively reduce lighting time, reach the object of power saving, extended the service time of battery supply set.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of cable-type fault detector of the present invention;
Fig. 2 is the flow chart of the fiber-optic signal code recognition method of cable-type fault detector of the present invention;
Fig. 3 is the structural representation of the fiber-optic signal code recognition system of cable-type fault detector of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Should be noted that, for cable-type fault detector, refer to Fig. 1, Fig. 1 is the structural representation of cable-type fault detector of the present invention, as shown in Figure 1, mainly formed by signal sending end 100 and signal receiving end 200, this signal sending end 100 is connected by optical fiber with signal receiving end 200, and in the present embodiment, described signal sending end is probe, described signal receiving end is indication panel or communication terminal, does not repeat them here.
Incorporated by reference to consulting Fig. 2, Fig. 2 is the flow chart of the fiber-optic signal code recognition method of cable-type fault detector of the present invention, as shown in Figure 2, said method comprising the steps of:
In step S1, described signal sending end is using the rising edge suddenling change in described fiber-optic signal or trailing edge as the pulse period of triggering the described fiber-optic signal of identification.Should explain, in the present embodiment, described signal sending end specifically comprises the rising edge suddenling change in described fiber-optic signal or trailing edge as the method for the pulse period of triggering the described fiber-optic signal of identification:
Identify the rising edge of a sudden change in described fiber-optic signal or trailing edge to the signal between rising edge or the trailing edge of next sudden change as a pulse period, and judge that the described pulse period comprises unit pulsewidth number.Using the rising edge suddenling change in described fiber-optic signal or trailing edge as the pulse period of triggering the described fiber-optic signal of identification, the impact of effectively having avoided the difference of components and parts under high temperature and low temperature to bring, effectively improve the precision of data identification, the bad logic level impact of simultaneously having avoided rising edge and trailing edge too smoothly to bring, effectively get rid of hardware differences, significantly reduced the error rate.
In step S2, described signal sending end carries out logic level coding according to the pulse period of each pulse of fiber-optic signal to fiber-optic signal, and the fiber-optic signal after coding is sent to signal receiving end, what should explain is, the method of in the present embodiment, according to the pulse period of each pulse of fiber-optic signal, fiber-optic signal being carried out to logic level coding specifically comprises:
In the time that the described pulse period has Liang Ge unit's pulsewidth, be encoded to logic low 0;
In the time that the described pulse period has three unit pulsewidths, be encoded to logic high 1.
Adopt logic level coding can guarantee the notable difference of logical one and logical zero, and having guaranteed does not have continuing of twice high level, is guaranteeing that signal transmits under reliable prerequisite, has effectively reduced lighting time, reach the object of power saving, thereby extended the service time of battery supply set.
In step S3, detect the logic level of described fiber-optic signal according to the described pulse period.In the present embodiment, described logic level comprises logic high and logic low.
The process of the fiber-optic signal code recognition method of above-mentioned cable-type fault detector is described with a simple example below, the unit pulsewidth of supposing the pulse period is 300us, it should be noted that, this unit pulse width adjusts accordingly with current environmental temperature, in the present embodiment, if current environmental temperature is lower than normal temperature, increase the unit pulse width under normal temperature, like this can reduce the bright time of LED, thereby fall the energy consumption of signal sending end.In the present embodiment, pulse period is 600us presentation logic 0, wherein, 600us comprises 300us high level and 300us low level, pulse period is 900us presentation logic 1, suppose and have the wave sequence (not shown) pulse period to be from left to right respectively 600us, 900us, 900us, 900us, 900us, 600us and 600us, above-mentioned wave sequence from left to right represents 0111100.Wherein, the trailing edge waveform of above-mentioned waveform is relatively mild, and for numeral, 1,0 identification has larger difference, and this point can be more violent under high temperature or low temperature, can cause error code.So above-mentioned wave sequence adopts the rising edge of sudden change as the pulse period of triggering identification fiber-optic signal, can avoid the too mild problem that declines, those skilled in the art should understand, also can change trailing edge into according to practical application, if the decline of for example wave sequence is comparatively mild, utilizing so rising edge to detect the pulse period can be more accurate.Finally, distinguish logic high or logic low by the pulse period of detection fiber signal.
One of ordinary skill in the art will appreciate that all or part of step realizing in the various embodiments described above method is can carry out the hardware that instruction is relevant by program to complete, corresponding program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk or CD etc.
Incorporated by reference to consulting Fig. 3, Fig. 3 is the structural representation of the fiber-optic signal code recognition system of cable-type fault detector of the present invention, as shown in Figure 3, this system comprises identification module 101 and the coding module 102 and the detection module 201 that are connected with described identification module 102 respectively, introduces respectively the effect of above-mentioned various piece below:
Compared to prior art, the rising edge suddenling change in employing fiber-optic signal or trailing edge are as the pulse period of triggering identification fiber-optic signal, and according to the logic level of pulse period detection fiber signal, the impact of effectively having avoided the difference of components and parts under high temperature and low temperature to bring, effectively improve the precision of data identification, meanwhile, the bad logic level impact of having avoided rising edge and trailing edge too smoothly to bring, effectively get rid of hardware differences, significantly reduced the error rate; According to the pulse width period of fiber-optic signal, fiber-optic signal is encoded, guarantee the notable difference of logical one and logical zero, and having guaranteed does not have continuing of twice high level, guaranteeing that signal transmits under reliable prerequisite, effectively reduce lighting time, reach the object of power saving, extended the service time of battery supply set.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (9)
1. a fiber-optic signal code recognition method for cable-type fault detector, is characterized in that, described cable-type fault detector comprises the signal sending end and the signal receiving end that connect by optical fiber, said method comprising the steps of:
S1. described signal sending end is using the rising edge suddenling change in described fiber-optic signal or trailing edge as the pulse period of triggering the described fiber-optic signal of identification;
S2. described signal sending end carries out logic level coding according to the pulse period of each pulse of fiber-optic signal to fiber-optic signal, and the fiber-optic signal after coding is sent to signal receiving end;
S3. described signal receiving end detected the logic level of described fiber-optic signal and identifies described fiber-optic signal according to the described pulse period.
2. the fiber-optic signal code recognition method of cable-type fault detector according to claim 1, it is characterized in that, described signal sending end specifically comprises the rising edge suddenling change in described fiber-optic signal or trailing edge as the method for the pulse period of triggering the described fiber-optic signal of identification:
Identify the rising edge of a sudden change in described fiber-optic signal or trailing edge to the signal between rising edge or the trailing edge of next sudden change as a pulse period, and judge the unit pulsewidth number that the described pulse period comprises.
3. the fiber-optic signal code recognition method of cable-type fault detector according to claim 2, is characterized in that, the method for fiber-optic signal being carried out to logic level coding according to the pulse period of each pulse of fiber-optic signal specifically comprises:
In the time that the described pulse period has Liang Ge unit's pulsewidth, be encoded to logic low 0;
In the time that the described pulse period has three unit pulsewidths, be encoded to logic high 1.
4. the fiber-optic signal code recognition method of cable-type fault detector according to claim 3, is characterized in that, the unit pulse width of described pulse period is 300us.
5. the fiber-optic signal code recognition method of cable-type fault detector according to claim 1, is characterized in that, described signal sending end is probe.
6. the fiber-optic signal code recognition method of cable-type fault detector according to claim 1, is characterized in that, described signal receiving end is indication panel or communication terminal.
7. the fiber-optic signal code recognition system of a cable-type fault detector, it is characterized in that, described cable-type fault detector comprises the signal sending end and the signal receiving end that connect by optical fiber, described signal sending end comprises identification module and coding module, and described signal receiving end comprises detection module;
Identification module, is connected with described coding module, and the rising edge described fiber-optic signal being suddenlyd change for described signal sending end or trailing edge are as the pulse period of triggering the described fiber-optic signal of identification;
Coding module, carries out logic coding according to the pulse period of each pulse of fiber-optic signal to fiber-optic signal for described signal sending end, and the fiber-optic signal after coding is sent to signal receiving end;
Detection module, with described identification module communication connection, for detecting the logic level of described fiber-optic signal according to the described pulse period and identifying described fiber-optic signal.
8. the fiber-optic signal code recognition system of cable-type fault detector according to claim 7, is characterized in that, described signal sending end is probe.
9. the fiber-optic signal code recognition system of cable-type fault detector according to claim 8, is characterized in that, described signal receiving end is indication panel or communication terminal.
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| CN201410076401.5A CN103840836A (en) | 2014-03-05 | 2014-03-05 | Optical fiber signal code identification method and system of cable type fault indicator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247128A (en) * | 2008-03-28 | 2008-08-20 | 南京航空航天大学 | Pulse-width modulation type optical fiber communication coding/decoding method and circuit with synchronous clock |
| CN101516152A (en) * | 2009-01-07 | 2009-08-26 | 北京巨数数字技术开发有限公司 | System and method for implementing synchronous refreshing |
| CN103605046A (en) * | 2013-11-14 | 2014-02-26 | 航天科工深圳（集团）有限公司 | Fault indicator and transmission method thereof |
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- 2014-03-05 CN CN201410076401.5A patent/CN103840836A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247128A (en) * | 2008-03-28 | 2008-08-20 | 南京航空航天大学 | Pulse-width modulation type optical fiber communication coding/decoding method and circuit with synchronous clock |
| CN101516152A (en) * | 2009-01-07 | 2009-08-26 | 北京巨数数字技术开发有限公司 | System and method for implementing synchronous refreshing |
| CN103605046A (en) * | 2013-11-14 | 2014-02-26 | 航天科工深圳（集团）有限公司 | Fault indicator and transmission method thereof |
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