CN117929928B - Circuit updating and fault detection method, system and medium based on Internet of things - Google Patents
Circuit updating and fault detection method, system and medium based on Internet of things Download PDFInfo
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Abstract
The invention relates to a circuit updating and fault detection method, a system and a medium based on the Internet of things, and relates to the technical field of fault detection. The invention has the advantages of quick and timely data updating, convenient in-time fault detection when faults occur, and improved working efficiency.
Description
Technical Field
The invention relates to the technical field of circuit detection, in particular to a circuit updating and fault detection method, system and medium based on the Internet of things.
Background
The application of the Internet of things sensor in the intelligent power grid improves the utilization efficiency of the existing infrastructure of the power system, and as a plurality of branch points exist in the circuit of the power distribution system where the building facility is located, the plurality of Internet of things sensors are configured in the output circuits of different branch points, so that faults of the circuit can be detected and positioned according to the Internet of things sensors. Along with the increasing number of the sensors of the internet of things connected to the building facilities, in order to facilitate later maintenance, after each new sensor is added, the branch point and the circuit length where the new sensor is located are recorded, and parameters of each sensor in the power distribution network are updated.
At present, the publication date is 2022, 05 and 03, and the Chinese patent with publication number CN113281609B proposes an active traveling wave positioning method, an active traveling wave positioning system and a storage medium of a power distribution network, which analyze the number of line branch points in the power distribution network according to the attenuation change of traveling wave signals in the power distribution network, input the traveling wave signals to two ends of the power distribution network and record the initial amplitude of the traveling wave signals, the traveling wave signals reaching fault points are subjected to total reflection, the traveling wave signals at two ends of the power distribution network are screened according to the number of the line branch points and the attenuation coefficient in the power distribution network, reflected traveling wave signals are screened, and the fault points of the power distribution network are positioned and maintenance personnel are assigned to be maintained according to the reflected traveling wave signals received by traveling wave detection devices at two ends of the power distribution network.
Aiming at the technical scheme, the method is generally suitable for a power distribution system with a longer power transmission line, the traveling wave signal measurement and calculation is carried out through the two ends of the power distribution line, the method is not suitable for the conditions that the number of branch points in a building facility is large and the number of sensors in an output circuit of the branch points is large, when a new sensor is added each time, in order to record the branch point where the new sensor is located and the length of the circuit, workers are required to review the historical record or the field measurement and calculation of the circuit for many times, further, the data update is not timely, if faults occur, the faults cannot be accurately detected, and the working efficiency is low.
Disclosure of Invention
In order to improve the working efficiency, the invention provides a circuit updating and fault detecting method, a system and a medium based on the Internet of things.
In a first aspect, the present invention provides a circuit updating and fault detecting method based on the internet of things, which adopts the following technical scheme:
a circuit updating and fault detecting method based on the Internet of things comprises the following steps:
Establishing a database: the output circuit at the initial end of the circuit is connected with a plurality of branch points, a section of circuit is connected between every two branch points, the branch point at the final end of the circuit is used for connecting a load, each branch point is provided with a sensor, and the database records that the total number of branch points in the input circuit of the ith sensor is The upper level pivot of the ith sensor is labeled/>Upper level fulcrum/>Branch circuit length to the ith sensor is/>；
Input data: the initial end of the circuit inputs the detection traveling wave signal, and the initial amplitude of the detection traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
New data are acquired: when the circuit is connected with the jth new sensor, j is larger than i, the length of the branch circuit from the new sensor to the upper level fulcrum is recorded
The starting end of the circuit inputs a detection traveling wave signal, and the final amplitude value of the traveling wave signal acquired by a new sensor is recordedAcquisition time/>；
And (3) calculating: number of branch points passed by a new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If/>And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
and (3) detection: the starting end of the circuit inputs the detection traveling wave signal to perform fault exploration, and the sensor acquires the traveling wave signal and records the final amplitude value Acquisition time/>；
Judging: if it detectsJudging that a fault occurs in an input circuit of an ith sensor, and recording/>And (3) if the signal is a fault signal, otherwise, executing a detection step.
By adopting the technical scheme, after a plurality of sensors are configured in a circuit of a building facility, a database records the codes of upper-level branch points corresponding to the sensors, the number of branch points passing through a total input circuit of the sensors and the length of branch circuits from the upper-level branch points of the sensors to the sensors, after a traveling wave signal is input to a circuit starting end, the amplitude of the traveling wave signal is attenuated after passing through the branch points, the wave speed is unchanged, and the final amplitude and the acquisition time acquired by the sensors are recorded; after a certain branch point is connected with a new sensor, the length of a branch circuit from the new sensor to the upper branch point is recorded, when the new sensor is needed to be acquired under which branch point, only the final amplitude and the acquisition time of the traveling wave signals acquired by the sensor are needed to be recorded, the total number of the branch points passing through is calculated, the acquisition time, the length of the branch circuit and the final amplitude of the sensors passing through the same number of the branch points are sequentially called, the length from the upper branch point of the new sensor to the beginning end of the circuit and the length from the upper branch point of other sensors to the beginning end of the circuit are calculated and are compared, meanwhile, the final amplitude is compared, if the two are the same, the new sensor and the sensor are positioned under the same branch point, and the code number of the upper branch point of the new sensor is recorded as the code number of the branch point; when fault detection is carried out, a detection traveling wave signal is input at the starting end of the circuit, when the detection traveling wave signal passes through a fault point in the circuit, the fault point simultaneously sends fault signals with opposite directions to the two ends of the circuit, and the amplitude of the fault signals is different from the amplitude of the detection traveling wave signal, so that if a sensor detects the final amplitude of abnormality, the fault is judged to occur in the circuit where the sensor is located; so set up, when inserting new sensor, need not to all acquire the circuit total length of new circuit at every turn, no longer need the staff to consult the historical data record of circuit or carry out the field measurement and calculation of circuit many times, reduced intensity of labour, the data update is quick timely, the timely troubleshooting of being convenient for when the trouble takes place, has improved work efficiency.
Optionally, the calculating further includes, ifAnd/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>/>, Sensor with changeAnd update/>, in the database。
By adopting the technical scheme, when a new upper-level fulcrum and a corresponding new sensor are connected into the circuit, the final amplitude of the traveling wave signals acquired by the new sensor is different from the final amplitude of the sensors with the same number as other branch points, andThe length from the starting end of the circuit to the upper-level branch point is different, the upper-level branch point is recorded, meanwhile, as the total number of branch points in the sensor circuit is increased by one by the sensor positioned under the output circuit of the branch point, the final amplitude received by the sensor is changed, the detection traveling wave signal is input again, the final amplitude of the sensor in the database is updated, if the number of sensors accessed by the existing branch point is limited, a branch point is needed to be newly accessed in the circuit when the new sensor is accessed, the total line length of the circuit is not needed to be acquired each time when the data of the new sensor is acquired, staff is not needed to review the historical data record of the circuit or to perform the field measurement and calculation of the circuit for many times, the labor intensity is reduced, the data of the recorded sensor in the subsequent branch point is updated in time, the data updating efficiency is improved, the fault is convenient to be checked in time when the fault occurs, and the working efficiency is improved.
Optionally, a fault node checking step is further provided after the judgment;
troubleshooting the failed node: all detected fault signals Acquisition time of sensor/>Form a set Q, get/>At/>And performing fault detection in the input circuit of the corresponding sensor, and updating Q after detection is finished until Q is an empty set.
By adopting the technical scheme, if a plurality of sensors all receive fault signals, the faults are located in the branch circuits of each sensor or the input circuits of the upper-level supporting points, so that the detection is started from the branch circuit of the sensor with the shortest acquisition time, and then the detection and the positioning of the faults are carried out by detecting the position of the area where the branch point is located until the sensors cannot detect the fault signals, and then the fault detection is finished.
Optionally, a step of calculating a fault position is further provided after the step of troubleshooting the fault node;
calculating a fault position: the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is Failure and/>The distance between the corresponding sensors is/>。
By adopting the technical scheme, when detecting the traveling wave signal to pass through the fault point in the circuit, the fault point simultaneously sends out fault traveling wave signals with opposite directions to the two ends of the circuit, the wave speed of the fault traveling wave signals on the circuit is the same as that of the normal traveling wave signals, and the starting end of the circuit receives the reflected traveling wave signals of the fault signals and the acquisition time
The distance from the fault position to the circuit starting end can be obtained through calculation of the acquisition time of the fault signal and the acquisition time and the wave speed of the reflected traveling wave signal of the fault signalAnd the distance between the fault location and the sensorThe fault detection and positioning are carried out, so that a worker can conveniently make a decision according to the distance, the starting position of fault detection and maintenance is selected, the labor intensity is reduced, the convenience and accuracy of fault detection are improved, the speed of fault detection is improved, and the working efficiency is further improved.
In a second aspect, the present invention provides a circuit updating and fault detecting system based on the internet of things, which adopts the following technical scheme:
a circuit update and fault detection system based on the internet of things, comprising:
Database: the input end is connected with the output end of the input data module and the output end of the calculation module respectively, the output end is connected with the input end of the calculation module, a plurality of branch points are connected in an output circuit at the starting end of the circuit, a section of circuit is connected between every two branch points, the branch point at the tail end of the circuit is used for connecting a load, each branch point is provided with a sensor, and a database is used for recording the total number of branch points in the input circuit of the ith sensor as The upper level pivot of the ith sensor is labeled/>Upper level fulcrum/>Branch circuit length to the ith sensor is/>；
And an input data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the database and is used for inputting the detection traveling wave signal at the starting end of the circuit and detecting the initial amplitude of the traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
And acquiring a new data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the calculation module, and the calculation module is used for recording the branch circuit length from the new sensor to the upper level fulcrum when j > i when the circuit is connected with the jth new sensorThe starting end of the circuit inputs a detection traveling wave signal, and the final amplitude/>, acquired by a new sensor, of the traveling wave signal is recordedAcquisition time/>；
The calculation module: the input end is connected with the output end of the new data acquisition module and the output end of the database respectively, and the output end is connected with the input end of the database and used for the number of branch points passed by the new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If/>And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
And a detection module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the judging module and is used for inputting and detecting the traveling wave signal at the starting end of the circuit to perform fault exploration, and the sensor acquires the traveling wave signal and records the final amplitude value Acquisition time/>；
And a judging module: the input end is connected with the output end of the detection module, and the output end is connected with the input end of the detection module for detectingJudging that a fault occurs in an input circuit of an ith sensor, and recording/>And (3) if the signal is a fault signal, otherwise, executing a detection step.
By adopting the technical scheme, after a plurality of sensors are configured in a circuit of a building facility, a database records the code numbers of upper-level branch points corresponding to the sensors, the number of branch points passing through the total circuit and the length of branch circuits from the last-level branch point to the sensors, and after a circuit starting end inputs a detection traveling wave signal, an input data module records the final amplitude and the collection time acquired by each sensor and transmits the signals to the database; after a certain branch point is connected with a new sensor, acquiring the branch circuit length from the new sensor to the upper branch point, when the new sensor is required to be acquired under which branch point, only the final amplitude and the acquisition time of the traveling wave signals acquired by the sensor need to be recorded, the calculation module calculates the total number of the branch points passing through, sequentially calls the acquisition time, the branch circuit length and the final amplitude of the sensors passing through the same number of the branch points, further calculates and acquires the length from the upper branch point of the new sensor to the starting end of the circuit and the length from the upper branch point of other sensors to the starting end of the circuit, compares the final amplitude, and if the two are the same, the new sensor and the sensor are positioned under the same branch point, records the upper branch point code of the new sensor as the code of the branch point, and updates the database; when the detection module detects faults, a detection traveling wave signal is input at the starting end of the circuit, when the detection traveling wave signal passes through a fault point in the circuit, the fault point simultaneously sends fault signals with opposite directions to the two ends of the circuit, and the amplitude of the fault signals is different from the amplitude of the detection traveling wave signal, so that if a sensor detects an abnormal final amplitude, the judgment module judges that faults occur in the circuit where the sensor is located; so set up, when inserting new sensor, need not to all acquire the circuit total length of new circuit at every turn, no longer need the staff to consult the historical data record of circuit or carry out the field measurement and calculation of circuit many times, reduced intensity of labour, the data update is quick timely, the timely troubleshooting of being convenient for when the trouble takes place, has improved work efficiency.
Optionally, the system further comprises a node updating module;
and a node updating module: the input end is connected with the output end of the calculation module, and the output end is connected with the input end of the calculation module for if And/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>Of a sensor of varying originAnd update/>, in the database。
By adopting the technical scheme, when a new upper-level fulcrum and a corresponding new sensor are connected into the circuit, the final amplitude of the traveling wave signals acquired by the new sensor is different from the final amplitude of the sensors with the same number as other branch points, andThe node updating module records the upper-level fulcrum and transmits signals to the calculating module, the calculating module transmits the signals to the database, meanwhile, as the total number of the branch points in the sensor circuit is increased by one due to the sensors positioned under the output circuit of the branch point, the final amplitude received by the sensors is changed, the detection traveling wave signals are input again, the final amplitude of the sensors in the database is updated, if the number of the sensors accessed by the existing branch points is limited, when a new sensor is accessed, a branch point needs to be newly accessed in the circuit, when the data of the new sensor is acquired, the total length of the circuit does not need to be acquired every time, staff is not required to review the historical data record of the circuit or perform the field measurement of the circuit for many times, the labor intensity is reduced, the data of the recorded sensors in the subsequent branch points are updated in time, the data updating efficiency is improved, the fault is conveniently and timely checked when the fault occurs, and the working efficiency is improved.
Optionally, the system further comprises a fault detection node module;
and (5) a fault node checking module: the input end is connected with the output end of the judging module to make all detected fault signals Acquisition time of sensor/>Form a set Q, get/>At/>And performing fault detection in the input circuit of the corresponding sensor, and updating Q after detection is finished until Q is an empty set.
By adopting the technical scheme, if a plurality of sensors all receive fault signals, the faults are located in the branch circuits of each sensor or in the input circuits of the upper-level supporting points, so that the fault checking node module starts checking from the branch circuit of the sensor with the shortest acquisition time, further performs fault detection and positioning by checking the position of the area where the branch points are located until the sensors cannot detect the fault signals, and the fault checking is finished.
Optionally, the system further comprises a fault location calculation module;
And a fault location calculating module: the input end is connected with the output end of the fault detection node module, the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is that Failure and/>The distance between the corresponding sensors is。
By adopting the technical scheme, when detecting the traveling wave signal to pass through the fault point in the circuit, the fault point simultaneously sends out fault traveling wave signals with opposite directions to the two ends of the circuit, the wave speed of the fault traveling wave signals on the circuit is the same as that of the normal traveling wave signals, and the starting end of the circuit receives the reflected traveling wave signals of the fault signals and the acquisition timeThe fault position calculating module can obtain the distance/>' from the position of the fault to the starting end of the circuit through the calculation of the acquisition time of the fault signal, the acquisition time and the wave speed of the reflected traveling wave signal of the fault signalAnd the distance between the fault location and the sensor/>The fault detection and positioning are carried out, so that a worker can conveniently make a decision according to the distance, the starting position of fault detection and maintenance is selected, the labor intensity is reduced, the convenience and accuracy of fault detection are improved, the speed of fault detection is improved, and the working efficiency is further improved.
In a third aspect, the present invention provides a circuit updating and fault detecting medium based on the internet of things, which adopts the following technical scheme:
A medium having a computer program stored thereon; the computer program, when executed by a processor, implements the method as described in the first aspect.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. After a certain branch point is connected with a new sensor, the length of a branch circuit of the new sensor, the final amplitude value and the acquisition time of traveling wave signals are recorded, the total number of the branch points passing through is calculated, the acquisition time, the length of the branch circuit and the final amplitude value of the sensors passing through the same number of the branch points are sequentially called, the length from the upper-level branch point of the new sensor to the starting end of the circuit and the length from the upper-level branch point of other sensors to the starting end of the circuit are calculated and obtained, the final amplitude value is compared, if the two are the same, the new sensor and the sensor are located under the same branch point, the upper-level branch point code number of the new sensor is recorded as the code number of the branch point, the arrangement is made, the total line length of the new circuit does not need to be acquired every time, the staff is not needed to refer to the historical data record of the circuit for many times or to measure the circuit in the field, the data update is fast and timely, the fault is convenient to be checked in time when faults occur, and the working efficiency is improved.
2. Through setting up of troubleshooting trouble node step, the trouble is located in the branch circuit of every sensor or in the input circuit of superior grade fulcrum, consequently, begin the investigation from the branch circuit of the shortest sensor of collection time, and then through the regional position of investigation this branch point place, detect and fix a position of trouble, until the sensor detects the trouble signal, then the trouble investigation is finished, so set up, do not need to carry out the investigation in proper order from the input circuit of every sensor, reduced intensity of labour, improved convenience and the timeliness of trouble investigation, improved work efficiency.
3. Through the setting of the step of calculating the fault position, when the detection traveling wave signal passes through the fault point in the circuit, the fault point simultaneously sends fault traveling wave signals with opposite directions to the two ends of the circuit, the circuit starting end receives the reflection traveling wave signal of the fault signal, and the distance from the fault position to the circuit starting end and the distance from the fault position to the sensor are obtained through calculation, so that a worker can conveniently make a decision according to the distance, the labor intensity is reduced, the convenience and the accuracy of fault investigation are improved, the speed of fault investigation is improved, and the working efficiency is further improved.
4. Through the setting of the calculation step, when a new upper-level branch point and a corresponding new sensor are connected into the circuit, the upper-level branch point is recorded, and the total number of branch points in the circuit is increased by one for the sensor positioned under the output circuit of the branch point, so that the final amplitude received by the sensor is changed, the detection traveling wave signal is input again, and the final amplitude of the sensor in the database is updated.
Drawings
FIG. 1 is a flow chart of embodiment 1 of the present application;
FIG. 2 is a system diagram of embodiment 2 of the present application;
Detailed Description
The invention is described in further detail below in connection with fig. 1-2.
Example 1: the embodiment discloses a circuit updating and fault detection method based on the internet of things, referring to fig. 1, the circuit updating and fault detection method based on the internet of things comprises the following steps:
S1: establishing a database: the output circuit at the initial end of the circuit is connected with a plurality of branch points, a section of circuit is connected between every two branch points, the branch point at the final end of the circuit is used for connecting a load, each branch point is provided with a sensor, and the database records that the total number of branch points in the input circuit of the ith sensor is The upper level pivot of the ith sensor is labeled/>Upper level fulcrum/>Branch circuit length to the ith sensor is/>；
S2: input data: the initial end of the circuit inputs the detection traveling wave signal, and the initial amplitude of the detection traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
S3: new data are acquired: when the circuit is connected with the jth new sensor, j is larger than i, the length of the branch circuit from the new sensor to the upper level fulcrum is recordedThe starting end of the circuit inputs a detection traveling wave signal, and the final amplitude/>, acquired by a new sensor, of the traveling wave signal is recordedAcquisition time/>；
S4: and (3) calculating: number of branch points passed by a new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If/>And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
If it is And/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>Of a sensor of varying originAnd update/>, in the database；
S5: and (3) detection: the starting end of the circuit inputs the detection traveling wave signal to perform fault exploration, and the sensor acquires the traveling wave signal and records the final amplitude valueAcquisition time/>；
S6: judging: if it detectsJudging that a fault occurs in an input circuit of an ith sensor, and recording/>If the signal is a fault signal, otherwise, executing a detection step;
s7: troubleshooting the failed node: all detected fault signals Acquisition time of sensor/>Form a set Q, get/>At/>Performing fault investigation in an input circuit of a corresponding sensor, and updating Q after the investigation is finished until Q is an empty set;
S8: calculating a fault position: the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is Failure and/>The distance between the corresponding sensors is/>。
The implementation principle of the circuit updating and fault detection method based on the Internet of things in the embodiment is as follows:
After a plurality of sensors are configured in a circuit of a building facility, a database records the codes of upper-level branch points corresponding to the sensors, the number of branch points passing through a total circuit of the sensors and the length from the last-level branch point of the sensor to the branch circuit of the sensor, after a circuit starting end inputs a detection traveling wave signal, the amplitude of the traveling wave signal is attenuated after passing through the branch point, the wave speed is unchanged, and the final amplitude and the collection time collected by the sensors are recorded.
After a certain branch point is connected with a new sensor, the length of a branch circuit from the new sensor to the upper branch point is recorded, when the new sensor is needed to be acquired under which branch point, only the final amplitude and the acquisition time of the traveling wave signals acquired by the sensor are needed to be recorded, the total number of the branch points passing through is calculated, the acquisition time, the length of the branch circuit and the final amplitude of the sensors passing through the same number of the branch points are sequentially called, the length from the upper branch point to the circuit starting end of the new sensor and the length from the upper branch point to the circuit starting end of other sensors are calculated and obtained, the lengths from the upper branch point to the circuit starting end of the other sensors are compared, and the final amplitudes are compared at the same time, namelyAnd/>And recording the upper-level fulcrum code of the new sensor as the code of the branch point when the new sensor and the sensor are positioned under the same branch point.
When a new upper-level branch point and a corresponding new sensor are connected into the circuit, the final amplitude of the traveling wave signals acquired by the new sensor is different from the final amplitude of the sensors with the same number as other branch points, andThe length from the starting end of the circuit to the upper-level branch point is different, the upper-level branch point is recorded, meanwhile, as the total number of branch points in the sensor circuit is increased by one by the sensor positioned under the output circuit of the branch point, the final amplitude received by the sensor is changed, the detection traveling wave signal is input again, the final amplitude of the sensor in the database is updated, if the number of sensors accessed by the existing branch point is limited, a branch point is needed to be newly accessed in the circuit when the new sensor is accessed, the total line length of the circuit is not needed to be acquired each time when the data of the new sensor is acquired, staff is not needed to review the historical data record of the circuit or to perform the field measurement and calculation of the circuit for many times, the labor intensity is reduced, the data of the recorded sensor in the subsequent branch point is updated in time, the data updating efficiency is improved, the fault is convenient to be checked in time when the fault occurs, and the working efficiency is improved.
When fault detection is carried out, a detection traveling wave signal is input at the starting end of the circuit, when the detection traveling wave signal passes through a fault point in the circuit, the fault point simultaneously sends fault signals with opposite directions to the two ends of the circuit, and the amplitude of the fault signals is different from the amplitude of the detection traveling wave signal, so that if a sensor detects an abnormal final amplitude, the fault is judged to occur in the circuit where the sensor is located, when a new sensor is connected, the total length of a circuit of the new circuit does not need to be acquired every time, workers are not required to review historical data records of the circuit or to carry out field measurement and calculation of the circuit, the labor intensity is reduced, the data updating is rapid and timely, the fault is convenient to check in time when the fault occurs, and the working efficiency is improved.
If a plurality of sensors all receive fault signals, the faults are located in the branch circuit of each sensor or the input circuit of the upper-level branch point, so that the detection is started from the branch circuit of the sensor with the shortest acquisition time, and then the detection and the positioning of the faults are carried out by detecting the position of the area where the branch point is located until the sensors cannot detect the fault signals, and the fault detection is finished.
When the detection traveling wave signal passes through the fault point in the circuit, the fault point simultaneously sends out fault traveling wave signals with opposite directions to the two ends of the circuit, the wave speed of the fault traveling wave signals on the circuit is the same as that of the normal traveling wave signals, and the starting end of the circuit receives the reflection traveling wave signals of the fault signals and the acquisition timeThe distance/>, from the fault position to the starting end of the circuit can be obtained through calculation of the acquisition time of the fault signal and the acquisition time and the wave speed of the reflected traveling wave signal of the fault signalAnd the distance between the fault location and the sensor/>The fault detection and positioning are carried out, so that a worker can conveniently make a decision according to the distance, the starting position of fault detection and maintenance is selected, the labor intensity is reduced, the convenience and accuracy of fault detection are improved, the speed of fault detection is improved, and the working efficiency is further improved.
Example 2: the embodiment discloses a circuit update and fault detection system based on the internet of things, referring to fig. 2, the circuit update and fault detection system based on the internet of things includes:
Database: the input end is connected with the output end of the input data module and the output end of the calculation module respectively, the output end is connected with the input end of the calculation module, a plurality of branch points are connected in an output circuit at the starting end of the circuit, a section of circuit is connected between every two branch points, the branch point at the tail end of the circuit is used for connecting a load, each branch point is provided with a sensor, and a database is used for recording the total number of branch points in the input circuit of the ith sensor as The upper level pivot of the ith sensor is labeled/>Upper level fulcrum/>Branch circuit length to the ith sensor is/>；
And an input data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the database and is used for inputting the detection traveling wave signal at the starting end of the circuit and detecting the initial amplitude of the traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
And acquiring a new data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the calculation module, and the calculation module is used for recording the branch circuit length from the new sensor to the upper level fulcrum when j > i when the circuit is connected with the jth new sensorThe starting end of the circuit inputs a detection traveling wave signal, and the final amplitude/>, acquired by a new sensor, of the traveling wave signal is recordedAcquisition time/>；
The calculation module: the input end is respectively connected with the output end of the new data acquisition module, the output end of the database and the output end of the node updating module, and the output end is respectively connected with the input end of the database and the input end of the node updating module for the number of branch points passed by the new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If/>And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
and a node updating module: the input end is connected with the output end of the calculation module, and the output end is connected with the input end of the calculation module for if And/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>Of a sensor of varying originAnd update/>, in the database。
And a detection module: the input end is connected with the output end of the sensor and the output end of the judging module respectively, the output end is connected with the input end of the judging module and is used for inputting and detecting traveling wave signals at the starting end of the circuit to perform fault exploration, and the sensor acquires the traveling wave signals and records the final amplitude valueAcquisition time/>；
And a judging module: the input end is connected with the output end of the detection module, and the output end is respectively connected with the input end of the detection module and the input end of the fault detection node module for detectingJudging that a fault occurs in an input circuit of an ith sensor, and recording/>And (3) if the signal is a fault signal, otherwise, executing a detection step.
And (5) a fault node checking module: the input end is connected with the output end of the judging module, the output end is connected with the input end of the fault position calculating module, so that all detected fault signalsAcquisition time of sensor/>Form a set Q, fetchAt/>And performing fault detection in the input circuit of the corresponding sensor, and updating Q after detection is finished until Q is an empty set.
And a fault location calculating module: the input end is connected with the output end of the fault detection node module, the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is thatFailure and/>The distance between the corresponding sensors is。
The implementation principle of the circuit updating and fault detection system based on the Internet of things in the embodiment is as follows:
After a plurality of sensors are configured in a circuit of a building facility, a database records the code numbers of upper-level branch points corresponding to the sensors, the number of branch points passing through a total circuit and the length of branch circuits from a last-stage branch point to the sensors, and after a circuit starting end inputs a detection traveling wave signal, an input data module records the final amplitude and the collection time acquired by each sensor and transmits the signals to the database.
After a certain branch point is connected with a new sensor, a new data module is acquired to record the branch circuit length from the new sensor to the upper branch point, when the new sensor is needed to be acquired under the certain branch point, only the final amplitude and the acquisition time of the traveling wave signals acquired by the sensor are needed to be recorded, the calculation module calculates the total number of the branch points passing through, sequentially calls the acquisition time, the branch circuit length and the final amplitude of the sensors passing through the same number of the branch points, further calculates and obtains the length from the upper branch point of the new sensor to the beginning end of the circuit and the length from the upper branch point of other sensors to the beginning end of the circuit, compares the final amplitude, and if the two are the same, the new sensor and the sensor are positioned under the same branch point, records the upper branch point code of the new sensor as the code of the branch point, and updates the database.
When a new upper-level branch point and a corresponding new sensor are connected into the circuit, the final amplitude of the traveling wave signals acquired by the new sensor is different from the final amplitude of the sensors with the same number as other branch points, andThe node updating module records the upper-level fulcrum and transmits signals to the calculating module, the calculating module transmits the signals to the database, meanwhile, as the total number of the branch points in the sensor circuit is increased by one by the sensor positioned under the output circuit of the branch point, the final amplitude received by the sensor is changed, the detection traveling wave signal is input again, the final amplitude of the sensor in the database is updated, if the number of the sensors accessed by the existing branch point is limited, a branch point is needed to be newly accessed in the circuit when a new sensor is accessed, when the data of the new sensor is acquired, the total length of the circuit is not needed to be acquired each time, staff is not needed to review the historical data record of the circuit or to perform the field measurement of the circuit, and meanwhile, the data of the recorded sensor in the subsequent branch point is updated in time, so that the data updating efficiency is improved, and the fault is convenient to be checked in time when the fault occurs.
When the detection module detects faults, a detection traveling wave signal is input at the starting end of the circuit, when the detection traveling wave signal passes through a fault point in the circuit, the fault point simultaneously sends fault signals with opposite directions to the two ends of the circuit, and the amplitude of the fault signals is different from the amplitude of the detection traveling wave signal, so that if a sensor detects an abnormal final amplitude, the judgment module judges that faults occur in the circuit where the sensor is located; so set up, when inserting new sensor, need not to acquire the circuit total length of new circuit at every turn, no longer need the staff to consult the historical data record of circuit or carry out the field measurement and calculation of circuit many times, the data update is quick timely, the timely troubleshooting of being convenient for when the trouble takes place, has improved work efficiency.
If a plurality of sensors all receive fault signals, the faults are located in the branch circuits of each sensor or in the input circuits of the upper-level supporting points, so that the fault checking node module starts checking from the branch circuit of the sensor with the shortest acquisition time, and then performs fault detection and positioning by checking the position of the area where the branch point is located until the sensors cannot detect the fault signals, and the fault checking is finished.
When the detection traveling wave signal passes through the fault point in the circuit, the fault point simultaneously sends out fault traveling wave signals with opposite directions to the two ends of the circuit, the wave speed of the fault traveling wave signals on the circuit is the same as that of the normal traveling wave signals, and the starting end of the circuit receives the reflection traveling wave signals of the fault signals and the acquisition timeThe fault position calculating module can obtain the distance/>' from the position of the fault to the starting end of the circuit through the calculation of the acquisition time of the fault signal, the acquisition time and the wave speed of the reflected traveling wave signal of the fault signalAnd the distance between the fault location and the sensor/>The fault detection and positioning are carried out, so that a worker can conveniently make a decision according to the distance, the starting position of fault detection and maintenance is selected, the labor intensity is reduced, the convenience and accuracy of fault detection are improved, the speed of fault detection is improved, and the working efficiency is further improved.
Example 3: the embodiment discloses a circuit updating and fault detection medium based on the internet of things, wherein the medium stores a program, and the program can realize part or all of the steps of the method described in the embodiment 1 when being executed.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (3)
1. The circuit updating and fault detecting method based on the Internet of things is characterized by comprising the following steps of:
establishing a database: the output circuit at the starting end of the circuit is connected with a plurality of branch points, a section of circuit is connected between every two branch points, the branch point at the tail end of the circuit is used for connecting a load, each branch point is provided with a sensor, I sensors are arranged in total, and the total number of branch points in the input circuit of the ith sensor is recorded in a database The upper level pivot of the ith sensor is labeled/>Upper level fulcrum/>Branch circuit length to the ith sensor is/>；
Input data: the initial end of the circuit inputs the detection traveling wave signal, and the initial amplitude of the detection traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
New data are acquired: when the circuit is connected with the jth new sensor, j is larger than i, the length of the branch circuit from the new sensor to the upper level fulcrum is recordedThe starting end of the circuit inputs a detection traveling wave signal, and the final amplitude/>, acquired by a new sensor, of the traveling wave signal is recordedAcquisition time/>；
And (3) calculating: number of branch points passed by a new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If/>And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
If it is And/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>/>, Sensor with changeAnd update/>, in the database；
And (3) detection: the starting end of the circuit inputs the detection traveling wave signal to perform fault exploration, and the sensor acquires the traveling wave signal and records the final amplitude valueAcquisition time/>；
Judging: if it detectsJudging that a fault occurs in an input circuit of an ith sensor, and recording/>If the signal is a fault signal, otherwise, the detection step is circularly executed;
troubleshooting the failed node: all detected fault signals Acquisition time of sensor/>Form a set Q, fetchAt/>Performing fault investigation in an input circuit of a corresponding sensor, and updating Q after the investigation is finished until Q is an empty set;
calculating a fault position: the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is Failure and/>The distance between the corresponding sensors is/>。
2. The circuit updating and fault detecting system based on the Internet of things, which is applied to the circuit updating and fault detecting method based on the Internet of things as claimed in claim 1, is characterized by comprising the following modules:
Database: the input end is connected with the output end of the input data module and the output end of the calculation module respectively, the output end is connected with the input end of the calculation module, a plurality of branch points are connected in an output circuit at the starting end of the circuit, a section of circuit is connected between every two branch points, the branch point at the tail end of the circuit is used for connecting a load, each branch point is provided with a sensor, and a database is used for recording the total number of branch points in the input circuit of the ith sensor as The upper level fulcrum of the ith sensor is marked asUpper level fulcrum/>Branch circuit length to the ith sensor is/>；
And an input data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the database and is used for inputting the detection traveling wave signal at the starting end of the circuit and detecting the initial amplitude of the traveling wave signalWave speed/>The attenuation coefficient k of the branch point is passed, the sensor acquires traveling wave signals, and the database records the final amplitude/>, of the traveling wave signalsAnd acquisition time/>；
And acquiring a new data module: the input end is connected with the output end of the sensor, the output end is connected with the input end of the calculation module, and the calculation module is used for recording the branch circuit length from the new sensor to the upper level fulcrum when j > i when the circuit is connected with the jth new sensorThe starting end of the circuit inputs a detection traveling wave signal, and the final amplitude/>, acquired by a new sensor, of the traveling wave signal is recordedAcquisition time/>；
The calculation module: the input end is respectively connected with the output end of the new data acquisition module, the output end of the database and the output end of the node updating module, and the output end is respectively connected with the input end of the database and the input end of the node updating module for the number of branch points passed by the new sensorSequentially calling the quantity of all branch points as/>/>、/>And/>If (if)And/>The ith sensor and the jth sensor are positioned at the same branch point, and the upper-level fulcrum of the jth sensor is recorded as/>Updating the database to make i=j;
and a node updating module: the input end is connected with the output end of the calculation module, and the output end is connected with the input end of the calculation module for if And/>A new upper level fulcrum/>, is established in the circuitThe sensor is connected with an upper level fulcrum/>Record/>The starting end of the circuit inputs the detection traveling wave signal to make all/>/>, Sensor with changeAnd update/>, in the database；
And a detection module: the input end is connected with the output end of the sensor and the output end of the judging module respectively, the output end is connected with the input end of the judging module and is used for inputting and detecting traveling wave signals at the starting end of the circuit to perform fault exploration, and the sensor acquires the traveling wave signals and records the final amplitude valueAcquisition time/>；
And a judging module: the input end is connected with the output end of the detection module, and the output end is respectively connected with the input end of the detection module and the input end of the fault detection node module for detectingJudging that a fault occurs in an input circuit of an ith sensor, and recording/>If the signal is a fault signal, otherwise, executing a detection step;
and (5) a fault node checking module: the input end is connected with the output end of the judging module, the output end is connected with the input end of the fault position calculating module, so that all detected fault signals Acquisition time of sensor/>Form a set Q, fetchAt/>Performing fault investigation in an input circuit of a corresponding sensor, and updating Q after the investigation is finished until Q is an empty set;
And a fault location calculating module: the input end is connected with the output end of the fault detection node module, the circuit initial section receives the reflection traveling wave of the fault signal, and the collection time of the reflection traveling wave is that Failure and/>The distance between the corresponding sensors is。
3. A circuit updating and fault detection medium based on the Internet of things is characterized in that: a computer program stored thereon, which when executed by a processor implements a circuit update and fault detection method based on the internet of things as claimed in claim 1.
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