CN105589051A - Method and device for calibrating current and method for detecting current - Google Patents
Method and device for calibrating current and method for detecting current Download PDFInfo
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- CN105589051A CN105589051A CN201410659034.1A CN201410659034A CN105589051A CN 105589051 A CN105589051 A CN 105589051A CN 201410659034 A CN201410659034 A CN 201410659034A CN 105589051 A CN105589051 A CN 105589051A
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Abstract
The invention relates to a method and device for calibrating current and a method for detecting current. The method for calibrating current comprises steps of: inputting standard current into a measured line, wherein at least one current sensor is installed in the measured line; acquiring a measured value of the standard current in each current sensor; determining calibration sections corresponding to the measured values of the standard current according to the measured values of the standard current, wherein the current sensor includes multiple calibration sections; and computing calibration coefficients of the current sensor in the calibration sections according to the standard current and the measured values of the standard current. When the current is detected, the current sensor automatically determines the calibration section corresponding to an actually-acquired random current value and computes an accurate current value by using the calibration coefficient corresponding to calibration section so as to accurately monitor the current state of a line.
Description
Technical field
The disclosure relates to route survey technical field, relates in particular to a kind of correcting current, detection method and device.
Background technology
Along with distribution line construction is more and more, the branch line of each branch is also more and more, and load also becomes increasingly complex, linePass by that to carry phenomenon more, and skewness, causes the place of this electricity consumption not use, local electricity abundance that should not electricity consumption.Detect each circuit current status particularly important.
At present, employing is provided with multiple current sensors on the line conventionally, utilizes current sensor to detect each circuitOn current status. Current sensor is by the calibration after conversion of the electric current on circuit is obtained to measurement electric current on circuit,But in the time that current value on circuit is different, use consistent calibration factor, can make the measurement current deviation that obtains larger,Thereby cause measurement data invalid, cannot complete the detection to line current state.
Summary of the invention
For overcoming the problem existing in correlation technique, the disclosure provides a kind of correcting current, detection method and device.
A kind of correcting current method, comprising:
In measurement circuitry, input a normalized current, at least one current sensor is installed in described measurement circuitry;
Gather respectively the measured value of each the above normalized current of current sensor;
Determine between the calibration areas corresponding with the measured value of described normalized current according to the measured value of described normalized current, described inCurrent sensor includes between multiple calibration areas;
Calculate described current sensor in described calibration areas according to the measured value of described normalized current and normalized currentCalibration factor.
Alternatively, the described measured value according to described normalized current is determined between the calibration areas at described current sensor place, bagDraw together:
Obtain the calibration interval table that described current sensor sets in advance, in described calibration interval table, comprise multiple calibration areasBetween, mutually continuous between between multiple described calibration areas;
To between the calibration areas in the measured value of described normalized current and described calibration interval table, compare;
Corresponding with the measured value of described normalized current by being defined as between the calibration areas at the measured value place of described normalized currentCalibration areas between.
Alternatively, the described measured value according to described normalized current and normalized current calculates described current sensor in described schoolCalibration factor in accurate interval, comprising:
Calculate the measured value of described normalized current and the ratio of described normalized current;
Calibration factor using described ratio as described current sensor in described calibration areas.
Alternatively, described method also comprises:
Regulate to the size of the normalized current of inputting in described measurement circuitry;
According to regulate after different normalized current sizes, described in current sensor obtains at least in each self-corresponding all calibrationsInterval calibration factor.
Alternatively, described method also comprises:
Calculate the ratio of described measurement electric current and described normalized current;
Calibration factor using described ratio as described current sensor in described calibration areas and by calibration factor with nothingLine or wire communication mode send to corresponding current sensor, so that each current sensor is by all calibration areas of correspondenceBetween calibration factor storage.
A kind of electric current detecting method, comprising:
Obtain the detection electric current on power circuit to be detected;
Determine between the target calibration areas that described detection electric current is corresponding, and obtain with described target calibration areas between corresponding calibration systemNumber;
Utilize described detection electric current and calibration factor to calculate the target current on described power circuit to be detected.
A kind of correcting current device, comprising:
Measurement circuitry;
Power supply circuits, for input a normalized current in described measurement circuitry, are provided with at least in described measurement circuitryA current sensor;
Collector, for gathering respectively the measured value of each the above normalized current of current sensor;
Processor, for determining the school corresponding with the measured value of described normalized current according to the measured value of described normalized currentAccurate interval, described current sensor includes between multiple calibration areas; And according to the measurement of described normalized current and normalized currentValue is calculated the described current sensor calibration factor interior in described calibration areas.
Alternatively, described processor also for, obtain the calibration interval table that described current sensor sets in advance, described schoolIn accurate interval table, comprise between multiple calibration areas, mutually continuous between between multiple described calibration areas; By the measurement of described normalized currentBetween the calibration areas in value and described calibration interval table, compare; By between the calibration areas at the measured value place of described normalized currentBe defined as between the calibration areas corresponding with the measured value of described normalized current.
Alternatively, described device also comprises:
Current regulating circuit, for regulating to the size of the normalized current of inputting in described measurement circuitry;
Memory, for according to regulate after different normalized current sizes, described in current sensor obtains at least right separatelyCalibration factor between all calibration areas of answering.
Alternatively, described device also comprises:
Ratio calculation device, for calculating the ratio of described measurement electric current and described normalized current;
Wireless module, using described ratio as described current sensor, in described calibration areas, interior calibration factor also will be calibratedCoefficient sends to corresponding current sensor with wireless or wire communication mode, so that each current sensor is by corresponding instituteThere is the calibration factor storage between calibration areas.
The technical scheme that embodiment of the present disclosure provides can comprise following beneficial effect:
The method that the embodiment of the present application provides, in the time that current sensor is calibrated, can dispatch from the factory at current sensorBefore, current sensor to be detected is connected in the measurement circuitry that can input normalized current, then according to the standard electric of inputStream, can accurately calculate internal calibration coefficient between the corresponding calibration areas of this current sensor. Like this, can control as requiredQuantity between calibration areas processed, just can make the calibration factor obtaining more meet the actual conditions of this current sensor, entersAnd in production application, current sensor utilization calibrate the calibration factor that obtains can Measurement accuracy to the electricity on circuitStream, accurately monitors line current state.
Should be understood that, it is only exemplary and explanatory that above general description and details are hereinafter described, can notThe restriction disclosure.
Brief description of the drawings
Accompanying drawing is herein merged in description and forms the part of this description, shows enforcement according to the inventionExample, and be used from and explain principle of the present invention with description one.
Fig. 1 is according to the flow chart of a kind of correcting current method shown in an exemplary embodiment.
Fig. 2 is according to the schematic diagram of a kind of correcting current device shown in an exemplary embodiment.
Fig. 3 is according to the schematic diagram between a kind of calibration areas shown in an exemplary embodiment.
Fig. 4 is according to the flow chart of a kind of correcting current method shown in another exemplary embodiment.
Fig. 5 is according to the flow chart of a kind of correcting current method shown in another exemplary embodiment.
Fig. 6 is according to the schematic diagram of a kind of correcting current device shown in another exemplary embodiment.
Fig. 7 is according to the schematic diagram of a kind of electric current detecting method shown in another exemplary embodiment.
Detailed description of the invention
Here will at length describe exemplary embodiment, its sample table shows in the accompanying drawings. Description below relates to attachedWhen figure, unless separately there is expression, the same numbers in different accompanying drawings represents same or analogous key element. Exemplary enforcement belowEmbodiment described in example does not represent all embodiments consistent with the present invention. On the contrary, they be only with asThe example of the consistent apparatus and method in some aspects that describe in detail in appended claims, of the present invention.
Fig. 1 is according to the flow chart of a kind of correcting current method method shown in an exemplary embodiment, as shown in Figure 1,The method comprises the following steps.
Step S101: input a normalized current in described measurement circuitry.
As shown in Figure 2, wherein: 1 is current sensor, 2 is measurement circuitry, as seen from the figure, and in measurement circuitry 2On at least one current sensor 1 is installed. And measurement circuitry 2 is connected with normalized current source 3, at normalized currentIn source 3, be provided with power supply circuits, utilize the power supply circuits can be to input current in measurement circuitry 2.
Step S102: the measured value that gathers respectively each the above normalized current of current sensor.
As shown in Figure 2, in Fig. 2, be also provided with collector 5 and processor 4, and collector 5 both can be by havingLine connected mode is connected with some or all current sensors, also can be by wireless connections mode with partly or entirely electricFlow sensor is connected. In disclosure embodiment, as shown in Figure 2, part current sensor 1 adopts wired connection sideFormula is connected with collector 5, and part current sensor 1 adopts wireless connections mode to be connected with collector 5.
No matter which kind of connected mode, collector 5 can obtain the measurement current acquisition of all current sensors 1. ?In concrete application, collector 5 can be input/output interface, and the measurement data of multiple current sensors 1 is exported to placeReason device 4.
Step S103: determine the calibration corresponding with the measured value of described normalized current according to the measured value of described normalized currentInterval.
Can be provided with between multiple calibration areas for each current sensor, between calibration areas, refer to taking electric current as foundation is by electricityStream is divided between multiple Current Zone successively from 0, can be mutually continuous between multiple calibration areas of same current sensor, in addition,It between multiple calibration areas of same current sensor, can be also discrete distribution. As shown in Figure 3, in figure, on x axle, be divided into manyBetween individual calibration areas, figure alignment interval describes taking 5 as example, in other embodiment of the application, and can also basisRequired precision arranges 10, between 20 even more calibration areas.
The circuit scope of place circuit when maximum interval between multiple calibration areas can be according to actual use of current sensorSet, for example: the maximum current between calibration areas can be set to 1000 amperes.
In disclosure embodiment, this step can comprise the following steps:
11), obtain the calibration interval table that described current sensor sets in advance.
For each current sensor, can preset as required between multiple calibration areas, as shown in Figure 3, many in figureMutually continuous between individual calibration areas, and by the form storage with list between the multiple calibration areas that set in advance.
12), will between the calibration areas in described measurement electric current and described calibration interval table, compare.
Between each calibration areas, there is an endpoint value at two ends, in this step, can by measure electric current respectively from different calibrationsThe endpoint value at interval two ends compares, and just can in next step, find between the calibration areas corresponding with measuring electric current.
13), will between the calibration areas at described measurement electric current place, be defined as between the calibration areas corresponding with described measurement electric current.
Step S104: calculate described current sensor in described calibration according to the measured value of described normalized current and normalized currentCalibration factor in interval.
In disclosure embodiment, this step can comprise the following steps:
21), calculate the measured value of described normalized current and the ratio of described normalized current.
22), the calibration factor in described calibration areas using described ratio as described current sensor.
In the time of practical application, in error allowed band, can retain in ratio default figure place after decimal point.
The method that the embodiment of the present application provides, in the time that current sensor is calibrated, can dispatch from the factory at current sensorBefore, current sensor to be detected is connected in the measurement circuitry that can input normalized current, then according to the standard electric of inputStream, can accurately calculate internal calibration coefficient between the corresponding calibration areas of this current sensor. Like this, can control as requiredQuantity between calibration areas processed, just can make the calibration factor obtaining more meet the actual conditions of this current sensor, entersAnd total in production application, current sensor utilization calibrate the calibration factor that obtains can Measurement accuracy to the electricity on circuitStream, monitors the current status of circuit.
In other embodiment of the application, as shown in Figure 4, on the basis of embodiment described in Fig. 1, the method is all rightComprise the following steps:
Step S105: regulate to the size of the normalized current of inputting in described measurement circuitry.
Referring to Fig. 2, output to the size of the normalized current in measurement circuitry in can control chart Plays current source, so thatCalculate the calibration factor of current sensor under various criterion electric current.
Step S106, according to different normalized current size after regulating, described in current sensor obtains at least corresponding separatelyAll calibration areas between calibration factor. Until normalized current has regulated, for example normalized current is adjusted to continuously from 1A40A。
By this step, can get the calibration between all calibration areas that are connected to all current sensors in measurement circuitryCoefficient. Conveniently in factory, current sensor is carried out to mass processing.
In another embodiment of the application, as shown in Figure 5, on basis embodiment illustrated in fig. 2, the method is all rightComprise the following steps:
S107: the ratio that calculates described measurement electric current and described normalized current;
S108: the calibration factor using described ratio as described current sensor in described calibration areas by calibration factorSend to corresponding current sensor with wireless or wire communication mode.
So that each current sensor is by the calibration factor storage between all calibration areas of correspondence.
Shown in Figure 6, on processor 4, can also be connected with wireless module 6, in disclosure embodiment, wireless mouldPiece 6 can be transmitting antenna. This step can utilize wireless module 6 that calibration factor is sent to all current sensors.
The calibration factor that utilizes this step to send, each current sensor can be by the calibration between all calibration areas of correspondenceCoefficient storage, so that current sensor is measured the circuit stream that powers on after dispatching from the factory in actual applications.
Embodiment shown in above-mentioned Fig. 1-Fig. 5 calibrated current sensor before current sensor dispatches from the factoryProcess, after current sensor is calibrated, in the time that reality is used, the application also provides a kind of electric current detecting method, as Fig. 7 instituteShow, this electric current detecting method can comprise:
Step S201: obtain the detection electric current on power circuit to be detected.
Power circuit to be detected is common distribution overhead line, and in the time that reality is used, work about electric power personnel are first by electric currentInstallation of sensors is on power circuit to be detected.
Step S202: determine between the target calibration areas that described detection electric current is corresponding, and obtain and described target calibration areas between rightThe calibration factor of answering.
Referring to above-mentioned Fig. 1-embodiment illustrated in fig. 5, each current sensor was provided with multiple calibration areas before dispatching from the factoryBetween, and between each calibration areas, have a corresponding calibration factor. In the time of practical application, between calibration areas and calibration factorCorresponding relation, can adopt the form of mapping table to be kept in current sensor.
Detect after electric current when getting in step S201 like this, can determine the target calibration corresponding with this detection electric currentInterval, and obtain with described target calibration areas between corresponding calibration factor.
Step S203: utilize described detection electric current and calibration factor to calculate the target electricity on described power circuit to be detectedStream.
Above-mentioned embodiment illustrated in fig. 1 in, utilize normalized current and measure electric current can calculate calibration factor, thisIn application embodiment, in the time getting actual detection electric current, can utilize calibration factor backwards calculation to obtain electric power to be detectedActual current value on circuit. Thereby realize, the current status of circuit is accurately monitored.
Fig. 2 is according to a kind of correcting current device block diagram shown in an exemplary embodiment. With reference to Fig. 2, in figure, 1 is electricityFlow sensor, this device comprises measurement circuitry 2, power supply circuits, collector 5 and processor 4, wherein:
At least one current sensor 1 is installed in measurement circuitry 2. And current sensor 1 can gather slotted lineElectric current on road 2 obtains measuring electric current.
As shown in Figure 2, circuit 2 to be detected is connected with normalized current source 3, and power supply circuits can be arranged on normalized currentIn source 3, and power supply circuits for inputting a normalized current in described measurement circuitry.
Collector 5 is connected with multiple current sensors 1 respectively, and collector 5 can be by wireless mode and partCurrent sensor 1 is connected, and also can be connected with part current sensor 1 by wired mode. Implement in the applicationIn example, collector 5 is for gathering respectively the measured value of each the above normalized current of current sensor, in concrete application,Collector 5 can be an input/output interface, and this input/output interface comprises multiple input interfaces and an outputInterface, object is the measurement electric current that gathers multiple current sensors 1, and outputs in processor 4.
Processor 4 is connected with power supply circuits, collector 5 respectively, and processor 4 not only can obtain the defeated of power supply circuitsGo out to the size of the normalized current in measurement circuitry 2, but also can obtain multiple current senses that collector 5 collectsThe measurement electric current of device.
Processor 4 is for determining the school corresponding with the measured value of described normalized current according to the measured value of described normalized currentAccurate interval, described current sensor includes between multiple calibration areas; And according to the measurement of described normalized current and normalized currentValue is calculated the described current sensor calibration factor interior in described calibration areas. In concrete application, processor can beCPU, single-chip microcomputer or server etc. possess the equipment of data-handling capacity.
This device, in the time that current sensor is calibrated, can, before current sensor dispatches from the factory, pass electric current to be detectedSensor is connected in the measurement circuitry that can input normalized current, then, according to the normalized current of input, can accurately calculateInternal calibration coefficient between the corresponding calibration areas of this current sensor. Like this, can control as required the quantity between calibration areas,Just can make the calibration factor obtaining more meet the actual conditions of this current sensor, so total in production application,Current sensor utilization calibrate the calibration factor that obtains can Measurement accuracy to the electric current on circuit, to the current status of circuitMonitor.
In embodiment of the application, processor 4 can also be used for obtaining the calibration that described current sensor sets in advanceInterval table, comprises between multiple calibration areas in described calibration interval table, mutually continuous between between multiple described calibration areas; Described in inciting somebody to actionBetween the calibration areas in the measured value of normalized current and described calibration interval table, compare; By the measured value of described normalized currentBetween the calibration areas at place, be defined as between the calibration areas corresponding with the measured value of described normalized current.
In another embodiment of the application, processor 4 can also be used for calculating described measurement electric current and described normalized currentRatio; After retaining described ratio decimal point according to default error requirements, preset after figure place, exist as described current sensorCalibration factor in described calibration areas.
In another embodiment of the application, this device can also comprise: current regulating circuit and memory, wherein,
Current regulating circuit is connected with the power supply circuits in normalized current source 3, for regulating to defeated in described measurement circuitryThe size of the normalized current entering;
Memory is connected with processor 4, for according to regulate after different normalized current sizes, current sensor obtainsThe described at least calibration factor between each self-corresponding all calibration areas.
Like this, just can obtain the calibration factor of all current sensors to be detected. In the time of storage, can be by calibration systemBetween number and calibration areas, store with the form of mapping table.
In another embodiment of the application, as shown in Figure 6, this device can also comprise: ratio calculation device (is positioned at placeIn reason device 4, not shown) and wireless module 6.
Ratio calculation device, for calculating the ratio of described measurement electric current and described normalized current;
Wireless module 6 is connected with calculator relatively, for to by the school between all calibration areas of each described current sensorAccurate coefficient, sends to corresponding current sensor, so that each current sensor is by the calibration between all calibration areas of correspondenceCoefficient storage.
In the embodiment of the present application, wireless module 6 can be transmitting antenna.
Those skilled in the art are considering description and putting into practice after invention disclosed herein, will easily expect of the present invention otherEmbodiment. The application is intended to contain any modification of the present invention, purposes or adaptations, these modification, purposesOr adaptations is followed general principle of the present invention and is comprised undocumented in the art known normal of the disclosureKnow or conventional techniques means. Description and embodiment are only regarded as exemplary, true scope of the present invention and spirit by underThe claim of face is pointed out.
Should be understood that, the present invention is not limited to precision architecture described above and illustrated in the accompanying drawings, andCan carry out various amendments and change not departing from its scope. Scope of the present invention is only limited by appended claim.
Claims (10)
1. a correcting current method, is characterized in that, comprising:
In measurement circuitry, input a normalized current, at least one current sensor is installed in described measurement circuitry;
Gather respectively the measured value of each the above normalized current of current sensor;
Determine between the calibration areas corresponding with the measured value of described normalized current according to the measured value of described normalized current, described inCurrent sensor includes between multiple calibration areas;
Calculate the described current sensor school interior in described calibration areas according to the measured value of described normalized current and normalized currentAccurate coefficient.
2. method according to claim 1, is characterized in that, described definite according to the measured value of described normalized currentBetween the calibration areas at described current sensor place, comprising:
Obtain the calibration interval table that described current sensor sets in advance, in described calibration interval table, comprise between multiple calibration areas,Mutually continuous between between multiple described calibration areas;
To between the calibration areas in the measured value of described normalized current and described calibration interval table, compare;
Corresponding with the measured value of described normalized current by being defined as between the calibration areas at the measured value place of described normalized currentBetween calibration areas.
3. method according to claim 1, is characterized in that, described according to described normalized current and normalized currentMeasured value calculates the described current sensor calibration factor interior in described calibration areas, comprising:
Calculate the measured value of described normalized current and the ratio of described normalized current;
Calibration factor using described ratio as described current sensor in described calibration areas.
4. method according to claim 1, is characterized in that, described method also comprises:
Regulate to the size of the normalized current of inputting in described measurement circuitry;
According to regulate after different normalized current sizes, described in current sensor obtains at least in each self-corresponding all calibrationsInterval calibration factor.
5. method according to claim 4, is characterized in that, described method also comprises:
Calculate the ratio of described measurement electric current and described normalized current;
Calibration factor using described ratio as described current sensor in described calibration areas and by calibration factor with wirelessOr wire communication mode sends to corresponding current sensor, so that each current sensor is by between all calibration areas of correspondenceCalibration factor storage.
6. an electric current detecting method, is characterized in that, comprising:
Obtain the detection electric current on power circuit to be detected;
Determine between the target calibration areas that described detection electric current is corresponding, and obtain with described target calibration areas between corresponding calibration systemNumber;
Utilize described detection electric current and calibration factor to calculate the target current on described power circuit to be detected.
7. a correcting current device, is characterized in that, comprising:
Measurement circuitry;
Power supply circuits, for input a normalized current in described measurement circuitry, are provided with at least in described measurement circuitryA current sensor;
Collector, for gathering respectively the measured value of each the above normalized current of current sensor;
Processor, for determining the school corresponding with the measured value of described normalized current according to the measured value of described normalized currentAccurate interval, described current sensor includes between multiple calibration areas; And according to the measurement of described normalized current and normalized currentValue is calculated the described current sensor calibration factor interior in described calibration areas.
8. device according to claim 7, is characterized in that, described processor also for, obtain described electric current and passThe calibration interval table that sensor sets in advance, comprises between multiple calibration areas in described calibration interval table, between multiple described calibration areasBetween mutually continuous; To between the calibration areas in the measured value of described normalized current and described calibration interval table, compare; By instituteState between the calibration areas at measured value place of normalized current and be defined as the calibration areas corresponding with the measured value of described normalized currentBetween.
9. device according to claim 7, is characterized in that, described device also comprises:
Current regulating circuit, for regulating to the size of the normalized current of inputting in described measurement circuitry;
Memory, for according to regulate after different normalized current sizes, described in current sensor obtains at least right separatelyCalibration factor between all calibration areas of answering.
10. device according to claim 9, is characterized in that, described device also comprises:
Ratio calculation device, for calculating the ratio of described measurement electric current and described normalized current;
Wireless module, using described ratio as described current sensor, in described calibration areas, interior calibration factor also will be calibratedCoefficient sends to corresponding current sensor with wireless or wire communication mode, so that each current sensor is by corresponding instituteThere is the calibration factor storage between calibration areas.
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Application publication date: 20160518 |