CN106404035A - Method for monitoring remote distance sensor state online - Google Patents
Method for monitoring remote distance sensor state online Download PDFInfo
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- CN106404035A CN106404035A CN201610741356.XA CN201610741356A CN106404035A CN 106404035 A CN106404035 A CN 106404035A CN 201610741356 A CN201610741356 A CN 201610741356A CN 106404035 A CN106404035 A CN 106404035A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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Abstract
The invention provides a method for monitoring a remote distance sensor state online. According to the method, at a system side, RS485 signals outputted by a sensor communicating with a system are acquired, waveform signals of the acquired RS485 signals are sampled and analyzed, a fault of the sensor or a transmission cable is determined according to sampled signal waveform, and sampling and analysis of the waveform signals of the acquired RS485 signals comprises analyzing whether waveform further has both positive and negative wave signals, acquiring positive and negative amplitudes of the waveform signals, calculating the rising edge time and the falling edge time, and determining whether peaks occur at rising edges and falling edges of the signals. The method is advantaged in that high timeliness is realized, influence on an existing system can be avoided, indoor equipment mounting is only required, adding equipment to the sensor is not required, construction is convenient, and the method is convenient to determine an equipment state of sensor-like equipment.
Description
Technical field
The present invention relates to a kind of sensor states monitoring method, specifically, relate to a kind of on-line monitoring and pass at a distance
The method of sensor state.
Background technology
Railway disaster prevention safety monitoring system is to ensure that one of important infrastructure that railway traffic safety runs.Mainly right
Jeopardize the burst harm such as natural calamity and foreign body intrusion of safety of railway traffic to be monitored, and provide disaster after treatment pre-
Alarming information, speed-limiting messages or stop information etc. are traffic dispatch center operational plan adjustment, assign driving control, rescue,
Maintenance provides plan for emergency handling and foundation, improves railway traffic safety and efficiency of operation further.So to disaster information
Accurately, can monitor is the basis of disaster prevention system.The environmental information of sensor collection site is typically adopted in disaster prevention system（Wind speed,
Rainfall, snowfall etc.）, then base station is passed to by cable, be analyzed processing by base station equipment and on deliver to processing center.By
Can be distant in the actual installation position of base station to sensor, disaster prevention system when not receiving sensing data, cannot and
When failure judgement reason, extend the time of system maintenance, reduce the availability of system.
In order to solve with present on problem, people are seeking a kind of preferable technical solution always.
Content of the invention
The purpose of the present invention is for the deficiencies in the prior art, provides a kind of real-time high, existing system will not be caused
Impact, and the method for the on-line monitoring remote pickup state being easily achieved.
To achieve these goals, the technical solution adopted in the present invention is：A kind of on-line monitoring remote pickup shape
The method of state, in system side, gathers the RS485 signal of the sensor output communicating with system, to the RS485 signal collecting
Waveform signal carries out sampling analysis, and the signal waveform according to sampling judges the fault of sensor or transmission cable.
Based on above-mentioned, sampling analysis carried out to the waveform signal of the RS485 signal collecting and includes：Whether analysis waveform is same
When possess positive negative wave signal；Obtain the positive and negative amplitude of waveform signal；Calculate rising edge and trailing edge time；Judge signal upper
Rise, whether trailing edge has spike to occur.
Based on above-mentioned, when the positive negative wave of signal is good, waveform rising, fall time are comparatively short, and sensor is judged as normally；
When signal lacks positive wave or negative wave, then it is judged as sensor communication failure；When signal amplitude is too low, the rising of signal, trailing edge
Time is long, or signal spike in rising, trailing edge, is all judged as transmission cable fault.
Hinge structure of the present invention has prominent substantive distinguishing features and marked improvement, and specifically, the inventive method is real
Shi Xinggao, will not impact to existing system, and only needs to install equipment indoors, need not increase equipment on a sensor,
Easy construction, the equipment state for judging sensor etc. provides conveniently.
Brief description
Fig. 1 is oscillogram when sensor communication is normal.
Fig. 2 is oscillogram during sensor communication failure.
Fig. 3 is oscillogram when transmission cable resistance is excessive.
Fig. 4 is oscillogram when transmission cable electric capacity is excessive.
Fig. 5 is oscillogram when transmission cable inductance is excessive.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail.
A kind of method of on-line monitoring remote pickup state, in system side, gathers the sensor communicating with system defeated
The RS485 signal going out, carries out sampling analysis to the waveform signal of the RS485 signal collecting, and is sentenced according to the signal waveform of sampling
Determine the fault of sensor or transmission cable.
Specifically, carry out sampling analysis to the waveform signal of the RS485 signal collecting to include：
Whether analysis waveform is provided simultaneously with positive negative wave signal, and when the positive negative wave of signal is good, waveform rises, fall time compares
Short, sensor is judged as normally, as shown in Figure 1.
When signal lacks positive wave or negative wave, then it is judged as sensor communication failure, as shown in Figure 2.
Obtain the positive and negative amplitude of waveform signal, when signal amplitude is too low, be judged to cable fault, the resistance mistake on cable
Greatly, data channel is of poor quality, as shown in Figure 3.
Calculate rising edge and trailing edge time, long when the rising of signal, trailing edge time, it is judged to cable fault,
Distribution capacity on cable is excessive, and data channel is of poor quality, as shown in Figure 4.
If signal has spike to occur in rising, trailing edge, it is judged to cable fault, the distributed inductance on cable is excessive, number
Poor according to channel quality, as shown in Figure 5.
Finally it should be noted that:Above example is only not intended to limit in order to technical scheme to be described；To the greatest extent
Pipe has been described in detail to the present invention with reference to preferred embodiment, and those of ordinary skill in the art should be understood：Still
The specific embodiment of the present invention can be modified or equivalent is carried out to some technical characteristics；Without deviating from this
The spirit of bright technical scheme, it all should be covered in the middle of the technical scheme scope that the present invention is claimed.
Claims (3)
1. a kind of method of on-line monitoring remote pickup state it is characterised in that：In system side, collection is communicated with system
The RS485 signal of sensor output, carries out sampling analysis to the waveform signal of the RS485 signal collecting, according to the letter of sampling
Number waveform judges the fault of sensor or transmission cable.
2. the method for on-line monitoring remote pickup state according to claim 1 is it is characterised in that to collecting
The waveform signal of RS485 signal carries out sampling analysis and includes：Whether analysis waveform is provided simultaneously with positive negative wave signal；Obtain waveform letter
Number positive and negative amplitude；Calculate rising edge and trailing edge time；Judge whether signal has spike to occur in rising, trailing edge.
3. on-line monitoring remote pickup state according to claim 2 method it is characterised in that：When signal is positive and negative
Waveform is good, and waveform rises, fall time is comparatively short, and sensor is judged as normally；When signal lacks positive wave or negative wave, then judge
For sensor communication failure；When signal amplitude is too low, the rising of signal, trailing edge time are long, or signal is rising, declining
Along spike occurs, all it is judged as transmission cable fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610741356.XA CN106404035A (en) | 2016-08-29 | 2016-08-29 | Method for monitoring remote distance sensor state online |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610741356.XA CN106404035A (en) | 2016-08-29 | 2016-08-29 | Method for monitoring remote distance sensor state online |
Publications (1)
| Publication Number | Publication Date |
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| CN106404035A true CN106404035A (en) | 2017-02-15 |
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| CN201610741356.XA Pending CN106404035A (en) | 2016-08-29 | 2016-08-29 | Method for monitoring remote distance sensor state online |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115824284A (en) * | 2022-11-30 | 2023-03-21 | 航天科技控股集团股份有限公司 | RS485 bus based frequency conversion intelligent sensor detection system |
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| US20110208890A1 (en) * | 2005-12-02 | 2011-08-25 | Entegris, Inc. | I/o systems, methods and devices for interfacing a pump controller |
| KR20130034330A (en) * | 2011-09-28 | 2013-04-05 | 한국전력공사 | Method and system for a detecting malfunction of power system map-board |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115824284A (en) * | 2022-11-30 | 2023-03-21 | 航天科技控股集团股份有限公司 | RS485 bus based frequency conversion intelligent sensor detection system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170215 |
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| RJ01 | Rejection of invention patent application after publication |