CN106383260A - Adaptive detection current sensor and anti-false-alarm adaptive detection method - Google Patents
Adaptive detection current sensor and anti-false-alarm adaptive detection method Download PDFInfo
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- CN106383260A CN106383260A CN201610945699.8A CN201610945699A CN106383260A CN 106383260 A CN106383260 A CN 106383260A CN 201610945699 A CN201610945699 A CN 201610945699A CN 106383260 A CN106383260 A CN 106383260A
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- current information
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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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
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention relates to the technical field of electric power automation, and especially relates to an adaptive detection current sensor and an anti-false-alarm adaptive detection method. The adaptive detection current sensor comprises an iron ring, a coil sampling loop, a processing control unit, a current memorization unit, a comparator, an adder and a fault information transfer unit. The current memorization unit memorizes real-time current information to get memorized current information. The adder raises a set threshold of the memorized current information, and compares the threshold-raised memorized current information and the real-time current information. When the current changes suddenly, the comparator outputs a trigger signal to awaken the processing control unit. By monitoring running lines through the novel adaptive detection method, the problem of false fault report for large current is solved, and the accuracy of fault detection is improved.
Description
Technical field
The present invention relates to technical field of electric power automation, more particularly, to a kind of current sensor of self-adapting detecting and anti-error
Report self-adapting detecting method.
Background technology
Current similar products have the products such as cable-type current temperature fault detector, segment encode LCD display fault detector.
Existing cable type current temperature fault detector, the signal that sensor captures is transferred to main frame by cable, and main frame receives
The electric current of cable, temperature information to after signal.
But there is following defect in conventional sensors, one be to closing a floodgate, shove, there is wrong report fault and ask in transient high-current
Topic, the degree of accuracy of fault detect is low；Two are, the processing and control module Non-intermittent work in current sensor, whole sensor
Power consumption is high；Three is that sensor adopts actively powered mode, the dependence to externally fed, installs inconvenience；Four is really less temperature to be believed
The detection of breath.
Therefore, for above deficiency, it is desirable to provide a kind of current sensor of self-adapting detecting and false alarm prevention self adaptation
Detection method.
Content of the invention
(1) technical problem to be solved
The purpose of the present invention is on the one hand to provide a kind of current sensor of self-adapting detecting, on the other hand provides a kind of anti-
Wrong report self-adapting detecting method, high the asking of power consumption of the low and whole sensor of the degree of accuracy to solve fault detect in prior art
Topic.
(2) technical scheme
In order to solve above-mentioned technical problem, one aspect of the present invention provides a kind of current sensor of self-adapting detecting, its
Transmit single including iron hoop, coil sampling circuit, processing and control element (PCE), electric current mnemon, comparator, adder and fault message
Unit, the induction coil of described coil sampling circuit and described iron hoop cooperation, with real-time detection current information, described process controls single
First and described coil sampling circuit is connected, to read real-time current information；Described electric current mnemon and described coil are sampled back
Road connects, to obtain memory current information；Described coil sampling circuit is connected with described comparator, and described electric current mnemon is led to
Cross adder to be connected with described comparator, described comparator receives raises the memory current information after given threshold through adder；
Described comparator is connected with processing and control element (PCE), inputs trigger and wake-up in current break to described processing and control element (PCE)
Described processing and control element (PCE)；Described processing and control element (PCE) is connected with described fault message delivery unit, after receiving trigger
Judged and sent fault message to host computer through fault message delivery unit.
Wherein, also include temperature sampling unit, described temperature sampling unit is connected with described processing and control element (PCE), will adopt
The temperature information of collection passes to described processing and control element (PCE).
Wherein, also include timing unit, described timing unit is connected with described processing and control element (PCE), when process sets
Between wake up described processing and control element (PCE) after section.
Wherein, described coil sampling circuit includes diode and the resistance connected；Also include built-in lithium cell, described interior
Put formula lithium battery to be connected with described processing and control element (PCE).
Wherein, described processing and control element (PCE) is micro-control unit；Described electric current mnemon is memory electric capacity；Described comparison
Device is comparator circuit；Described adder is adder circuit；Described fault message delivery unit is communication unit.
On the other hand present invention also offers a kind of false alarm prevention self-adapting detecting method, it comprises the following steps：
S1. obtain the real-time current information on a circuit by way of electromagnetic induction, by coil sampling circuit pair
Real-time current information carries out rectification sampling, and real-time current information is sent into processing and control element (PCE), and processing and control element (PCE) timing is read
Take real-time current information；
S2. real-time current information is remembered by electric current mnemon, and obtain memory current information；
S3. by adder, memory current information is raised with the threshold value of setting；
S4. by comparator, the memory current information through raising given threshold is compared with real-time current information, with
Obtain trigger, trigger is sent to processing and control element (PCE)；
S5. according to the trigger transmitting, wake up processing and control element (PCE), by processing and control element (PCE) to real-time current information
After carrying out detection judgement, send fault-signal.
Wherein, it comprises the following steps：
By way of wired or wireless, above-mentioned fault-signal is passed to host computer.
Wherein, in step S4, during current break, comparator is according to the memory current information through raising given threshold with real time
Current information, sends trigger.
Wherein, in step S1, processing and control element (PCE) was timed device and wakes up reading real-time current information once every 10 seconds, and 1
Complete in millisecond to enter sleep state after measurement is read.
Wherein, further comprising the steps of：
Detect the temperature information of a circuit by temperature sampling unit, and temperature information is sent into processing and control element (PCE).
(3) beneficial effect
The technique scheme of the present invention has the advantage that：The present invention provide the current sensor of self-adapting detecting and
In false alarm prevention self-adapting detecting method, real-time current information is remembered by electric current mnemon, and obtains memory current information, and
By adder, memory current information is raised with the threshold value of setting, by through raising memory current information and real-time current after threshold value
Information compares, and during current break, comparator can export trigger and wake up processing and control element (PCE), by this new self adaptation inspection
Survey mode is monitored to working line, solves the problems, such as high current wrong report fault, improves the degree of accuracy of fault detect.
Processing and control element (PCE) adopts timing wake-up and current break to wake up two kinds of wake-up modes, and real-time is good and power consumption
Low, processing and control element (PCE) is in sleep state at ordinary times, and whole circuit power consumption is very low, will not miss fault mutation ensure that simultaneously whole
The power consumption of individual system.
Built-in lithium cell is connected with described processing and control element (PCE), changes the dependence to externally fed for original sensor,
It is more convenient to install.
It is connected with processing and control element (PCE) by temperature sampling unit, the temperature information of collection is passed to described process and controls
Unit processed, the detection of electric current and temperature signal of such sensor integration, improve the applicability of sensor.
Brief description
Fig. 1 is the fundamental diagram of the current sensor that the embodiment of the present invention adopts self-adapting detecting mode；
Fig. 2 is the contour structures schematic diagram of the current sensor that the embodiment of the present invention adopts self-adapting detecting mode；
Fig. 3 is the annexation circuit that the embodiment of the present invention adopts comparator in the current sensor of self-adapting detecting mode
Figure.
In figure, 1：U-shaped iron hoop；2：Sensor housing；3：Comparator.
Specific embodiment
With reference to the accompanying drawings and examples the specific embodiment of the present invention is described in further detail.Following examples
For the present invention is described, but it is not limited to the scope of the present invention.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score,
The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " or position relationship are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1, Figure 2 and Figure 3, the current sensor using self-adapting detecting mode that the present invention provides includes iron
Ring, coil sampling circuit, processing and control element (PCE), electric current mnemon, comparator 3, adder and fault message delivery unit, line
The induction coil of circle sampling circuit and iron hoop (specially U-shaped iron hoop 1) coordinate, and with real-time detection current information, process control single
Unit is connected with coil sampling circuit, to read real-time current information；Electric current mnemon is connected with coil sampling circuit, to obtain
Memory current information, the reflection of this memory current information for the current information before certain period；Coil sampling circuit and comparator
Connect, electric current mnemon is connected with comparator by adder, comparator receives raises the note after given threshold through adder
Recall current information；Comparator is connected with processing and control element (PCE), in current break to processing and control element (PCE) input trigger and
Wake up processing and control element (PCE)；Processing and control element (PCE) is connected with fault message delivery unit, is judged after receiving trigger
And fault message is sent to host computer through fault message delivery unit.Wherein, processing and control element (PCE) is specially micro-control unit,
I.e. MCU；Coil sampling circuit, processing and control element (PCE), electric current mnemon, comparator, adder and fault message delivery unit
It is built in sensor housing 2；In Fig. 3, real-time current information VFD and memory current information VT enter comparator 3, and comparator will
Trigger VH sends.
In above-described embodiment, sensor internal adopts an induction coil, and the cooperation U-shaped iron hoop of sensor external forms closure
Loop, using the current information on circuit of electromagnetic induction technical limit spacing, specifically, coil sampling circuit enters to real-time current
Row rectification sampling obtains real-time current information, is then fed into processing and control element (PCE) timing and reads real-time current information；Real-time current
The treated control unit of information is processed, and the real-time current information collecting can be uploaded main frame；Electric current mnemon and coil are adopted
Sample loop connects, and real-time current information remembers current information through electric capacity Memory acquisition, then to memory current information through adder
After raising certain threshold value, will be compared with real-time current information through raising the memory current information after threshold value by comparator, in electricity
Obtain trigger during stream mutation, during current break, comparator can export trigger and wake up processing and control element (PCE), process and control
Send fault-signal after the measured judgement of unit, upload fault message in order to real-time.
Wherein, form memory electric current letter because sensor carries out memory using electric current mnemon to real-time current information
Breath, and certain threshold value is raised by adder, will compare with real-time current information through raising the memory current information after threshold value, just
Often under change conditions, real-time current information is less than through raising the memory current information after threshold value, and trigger do not sent out by comparator, electricity
During stream mutation, real-time current information is more than through raising the memory current information after threshold value, and comparator can export trigger and wake up
Processing and control element (PCE), is monitored to working line by this new self-adapting detecting mode, it is right in prior art to solve
Close a floodgate, shove, transient high-current report by mistake fault problem, improve the degree of accuracy of fault detect；Meanwhile, processing and control element (PCE) is adopted
Wake up two kinds of wake-up modes with current break, real-time is good and low in energy consumption, and processing and control element (PCE) is in sleep state at ordinary times, whole
Individual circuit power consumption is very low.
Further, also include temperature sampling unit, temperature sampling unit is connected with processing and control element (PCE), by collection
Temperature information passes to processing and control element (PCE)；So sensor integration detection of electric current and temperature signal, temperature sampling unit
The data of detection is also fed into processing and control element (PCE) and then can upload host computer.
Specifically, also include timing unit, timing unit is connected with processing and control element (PCE), after the time period through setting
Wake up processing and control element (PCE), real-time current information is read in timing.Sensor wakes up two kinds using timing wake-up and current break and calls out
Awake mode, (as 10 seconds) is timed device wake-up once to control process unit at regular intervals, completes in the short time (as 1 millisecond)
Sleep state is entered, so Overall Power Consumption is extremely low after measurement；So, ensure that whole system while fault mutation will not be missed
Power consumption.
Specifically, coil sampling circuit includes diode and the resistance connected, and so can raise sampling electricity during small current
Pressure information (or current information), improves sampling precision；Also include built-in lithium cell, built-in lithium cell and processing and control element (PCE)
Connect, change the dependence to externally fed for original sensor, it is more convenient to install.
Specifically, electric current mnemon is memory electric capacity, and comparator is comparator circuit；Adder is adder circuit；
Fault message delivery unit is communication unit, and fault message transmission can be wired mode or wirelessly.
The false alarm prevention self-adapting detecting method of the line signal that another aspect of the present invention provides, it includes following step
Suddenly：
S1. obtain the real-time current information on a circuit by way of electromagnetic induction, by coil sampling circuit pair
Real-time current information carries out rectification sampling, and real-time current information is sent into processing and control element (PCE) (specially MCU), processes and controls
Real-time current information is read in unit timing, is in sleep state at ordinary times；
S2. real-time current information is remembered by electric current mnemon, and obtain memory current information；
S3. by adder, memory current information is raised with the threshold value of setting；
S4. by comparator, the memory current information through raising given threshold is compared with real-time current information, with
Obtain trigger, trigger is sent to processing and control element (PCE)；
S5. according to the trigger transmitting, wake up processing and control element (PCE), by processing and control element (PCE) to real-time current information
After carrying out detection judgement, send fault-signal.
Real-time current information is remembered by electric current mnemon, and obtains memory current information, and by adder to note
Recall the threshold value that current information raises setting, will compare with real-time current information through raising the memory current information after threshold value, normally
Under change conditions, real-time current information is less than through raising the memory current information after threshold value, and comparator does not send out trigger, electric current
During mutation, comparator can export trigger and wake up processing and control element (PCE), by this new self-adapting detecting mode to operation
Circuit is monitored, and solves the problems, such as high current wrong report fault, improves the degree of accuracy of fault detect；Meanwhile, process and control
Unit adopts timing wake-up and current break to wake up two kinds of wake-up modes, and real-time is good and low in energy consumption, and processing and control element (PCE) is put down
When be in sleep state, whole circuit power consumption is very low.
Specifically, it is further comprising the steps of：
By way of wired or wireless, above-mentioned fault-signal is passed to host computer.
Specifically, in step S4, during current break, comparator is according to memory current information and the reality through raising given threshold
When current information, send trigger.
In step S1, processing and control element (PCE) was timed device and wakes up reading real-time current information once every 10 seconds, in 1 millisecond
Complete to enter sleep state after measurement is read.
Specifically, further comprising the steps of：
Detect the temperature information of a circuit by temperature sampling unit, and temperature information is sent into processing and control element (PCE).
So sensor integration detection of electric current and temperature signal, the data of temperature sampling unit detection is also fed into processing and control element (PCE)
Then host computer can be uploaded.
In addition, in the present invention, sensor adopts encapsulation technology embedding, and classification of waterproof is up to IP67.
In sum, the present invention provide the current sensor of self-adapting detecting and false alarm prevention self-adapting detecting method in,
Real-time current information is remembered by electric current mnemon, and obtains memory current information, and by adder to memory electric current letter
Breath raises the threshold value of setting, will compare with real-time current information through raising the memory current information after threshold value, during current break, than
Trigger can be exported compared with device and wake up processing and control element (PCE), by this new self-adapting detecting mode, working line be supervised
Survey, solve the problems, such as high current wrong report fault, improve the degree of accuracy of fault detect；Meanwhile, processing and control element (PCE) is using fixed
When wake up and current break wakes up two kinds of wake-up modes, real-time is good and low in energy consumption, and processing and control element (PCE) is in sleep at ordinary times
State, whole circuit power consumption is very low；Built-in lithium cell is connected with processing and control element (PCE), changes original sensor and supplies to outside
The dependence of electricity, it is more convenient to install.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and modification can also be made, these improve and modification
Also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of current sensor of self-adapting detecting it is characterised in that：It includes iron hoop, coil sampling circuit, processes control
Unit, electric current mnemon, comparator, adder and fault message delivery unit, the induction coil of described coil sampling circuit
With the cooperation of described iron hoop, with real-time detection current information, described processing and control element (PCE) is connected with described coil sampling circuit, to read
Take real-time current information；Described electric current mnemon is connected with described coil sampling circuit, to obtain memory current information；Described
Coil sampling circuit is connected with described comparator, and described electric current mnemon is connected with described comparator by adder, described
Comparator receives raises the memory current information after given threshold through adder；Described comparator is connected with processing and control element (PCE),
In current break to described processing and control element (PCE) input trigger and the described processing and control element (PCE) of wake-up；Described process controls
Unit is connected with described fault message delivery unit, is judged and by fault message through fault message after receiving trigger
Delivery unit sends host computer to.
2. self-adapting detecting according to claim 1 current sensor it is characterised in that：Also include temperature sampling list
Unit, described temperature sampling unit is connected with described processing and control element (PCE), the temperature information of collection is passed to described process and controls
Unit processed.
3. self-adapting detecting according to claim 2 current sensor it is characterised in that：Also include timing unit, institute
State timing unit to be connected with described processing and control element (PCE), after the time period through setting, wake up described processing and control element (PCE).
4. self-adapting detecting according to claim 3 current sensor it is characterised in that：Described coil sampling circuit bag
Include diode and the resistance of series connection；Also include built-in lithium cell, described built-in lithium cell is with described processing and control element (PCE) even
Connect.
5. self-adapting detecting according to claim 3 current sensor it is characterised in that：Described processing and control element (PCE) is
Micro-control unit；Described electric current mnemon is memory electric capacity；Described comparator is comparator circuit；Described adder is addition
Device circuit；Described fault message delivery unit is communication unit.
6. a kind of false alarm prevention self-adapting detecting method it is characterised in that：It comprises the following steps：
S1. obtain the real-time current information on a circuit by way of electromagnetic induction, by coil sampling circuit to real-time
Current information carries out rectification sampling, and real-time current information is sent into processing and control element (PCE), and processing and control element (PCE) timing is read real
When current information；
S2. real-time current information is remembered by electric current mnemon, and obtain memory current information；
S3. by adder, memory current information is raised with the threshold value of setting；
S4. by comparator, the memory current information through raising given threshold is compared with real-time current information, to obtain
Trigger, trigger is sent to processing and control element (PCE)；
S5. according to the trigger transmitting, wake up processing and control element (PCE), by processing and control element (PCE), real-time current information is carried out
After detection judges, send fault-signal.
7. false alarm prevention self-adapting detecting method according to claim 6 it is characterised in that：It comprises the following steps：
By way of wired or wireless, above-mentioned fault-signal is passed to host computer.
8. false alarm prevention self-adapting detecting method according to claim 7 it is characterised in that：In step S4, during current break,
Comparator, according to memory current information and real-time current information through raising given threshold, sends trigger.
9. false alarm prevention self-adapting detecting method according to claim 8 it is characterised in that：In step S1, process and control list
Unit was timed device and wakes up reading real-time current information once every 10 seconds, completed to enter sleep state after measurement is read in 1 millisecond.
10. false alarm prevention self-adapting detecting method according to claim 9 it is characterised in that：Further comprising the steps of：
Detect the temperature information of a circuit by temperature sampling unit, and temperature information is sent into processing and control element (PCE).
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |