CN101339442B - Power cable conductor temperature automatic following and control method - Google Patents
Power cable conductor temperature automatic following and control method Download PDFInfo
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- CN101339442B CN101339442B CN2008100482297A CN200810048229A CN101339442B CN 101339442 B CN101339442 B CN 101339442B CN 2008100482297 A CN2008100482297 A CN 2008100482297A CN 200810048229 A CN200810048229 A CN 200810048229A CN 101339442 B CN101339442 B CN 101339442B
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Abstract
The invention relates to a power cable conductor temperature automatic following and controlling method, which is composed of a data processing unit, a data acquisition unit and a control output unit related to the aspect of the hardware, and is logically constituted by a temperature rise controlling mode, an automatic tracking and control mode, a temperature stable control mode and a temperature drop controlling mode. The invention is characterized in that: the data acquisition unit real-timely collects the heating current data and the temperature data of the cable conductor and feeds back to the data processing unit, which determines the implementary adjustment amplitude according to the software algorithm, and the control output unit completes the practical performance, completes the full automatic tracking control of the cable conductor temperature. The invention realizes the temperature control with overall process, full automation and high precision.
Description
Technical field
The invention belongs to a kind of control method of power cable conductor temperature, particularly a kind ofly be used to control power cable conductor temperature reaches equilibrium temperature constantly in regulation power cable conductor temperature automatic following and control method.
Background technology
In power grid construction, power cable, especially adopts in urban distribution network is built at power grid construction in a large number because floor area is little, electromagnetic interference (EMI) is low, be subjected to extraneous factor to influence advantages such as little.The existing power cable adopts solid material as the major part that guarantees its electrical insulation properties usually, and its safety and reliability are particularly important.Since the dielectric properties of cable insulation layer material and insulating property whether safety with its conductor because there is close theory relation in the temperature that produces by load, therefore, before putting into commercial operation, certain novel cable product must test to its performance according to relevant technical standard, and safe and reliable to guarantee its performance.In the test item of standard code, duty cycle test be consuming time the longest, technical requirement is the harshest, and the detection content--its requires to carry out periodicity by the conductor to cable and heats, the maximum permissible temperature (90 ℃～95 ℃) that makes conductor temperature reach this kind cable insulation material to can bear, and make conductor temperature keep 2h at least at each end-of-cycle.In method of testing in the past, relevant scientific research institution adopts the mode of " heating, manually adjust electric current according to the normalized current data " to finish this content usually, there is following deficiency in such method of testing: 1, according to the heating of normalized current data, can't effectively consider the thermal field measuring error that variation of ambient temperature causes; 2, the moving stability characteristic (quality) of the conductor temperature in the control procedure is difficult to guarantee; 3, technology is loaded down with trivial details, and temperature control precision is subjected to operating personnel's quality influence bigger than normal.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can realize the test of full-automatic duty cycle, and realize the power cable conductor temperature automatic following and the control method of the control of high precision conductor temperature, to overcome above-mentioned deficiency.
To achieve these goals, the present invention on hardware by data processing unit, data acquisition unit, the control output unit constitutes, logically by temperature rising control model, automatic tracking Control pattern, temperature stabilization control model and cooling control model are formed, be characterized in: gather the heating current data and the temperature data of cable conductor in real time and feed back to data processing unit by data acquisition unit, data processing unit is according to the definite adjustment amplitude that should implement of software algorithm, and finish practical operation by the control output unit, finish the Automatic Control of duty cycle test.
Above-mentioned concrete grammar is:
First step: after the cable test product of testing installs, the elementary structure parameter of cable is set, to determine the initial heating current of cable test product conductor under current environment;
Second step: the heating process of cable test product begins automatic operation, and when beginning first batch total and enter temperature rising control model, heating current in the cable conductor and conductor temperature will begin to be gathered and feed back to data processing unit in real time by data acquisition unit;
Third step: after the conductor temperature of cable reaches the eigenwert of regulation, enter automatic tracking Control pattern, begin to the cable conductor temperature before this climbing speed and the characteristic quantity of temperature history curve calculate, determine the amplitude adjustment size that the cable conductor heating current need carry out, and finish by the control output unit;
The 4th step: every official hour at interval, repeat the calculating content and the control output content of third step, guarantee that the temperature of cable conductor is approached controlled target according to normal trend;
The 5th step: when the conductor temperature of cable reached in the controlled target allowed band, when beginning second batch total, heating current entered the temperature stabilization control model simultaneously;
The 6th step: the time arrives during second batch total, begins to enter the cooling control model, and safety reduces heating current and disjunction power supply;
The 7th step: carry out the control procedure of stipulated number automatically, finish until content of the test.
The invention has the advantages that and to realize overall process, full-automatic, high-precision cable conductor temperature controlled processes, can finish high-precision conductor temperature automatic following and control, avoided the control accuracy difference and the loaded down with trivial details shortcoming of technology of traditional hand-guided method effectively, controlled respond well.
Description of drawings
Fig. 1 is a general flow chart of the present invention;
Fig. 2 is the process flow diagram of temperature acquisition subalgorithm of the present invention;
Fig. 3 is the process flow diagram of current acquisition subalgorithm of the present invention;
Fig. 4 controls the process flow diagram of subalgorithm automatically for electric current of the present invention;
Fig. 5 is the process flow diagram of the automatic tracking Control pattern of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail, but following embodiment should not be construed as limitation of the present invention.
The present invention is before controlling automatically, should at first the cable loop of testing be installed, and the special-purpose current feedback circuit of installation, current transformer and relevant observing and controlling loop, behind the elementary structure parameter of input cable test product, the heating process of cable will begin to carry out automatically, and by monitoring the heating current of cable and the current numerical value and the variation tendency of conductor temperature in real time, by full-automatic tracking and the control of tailor-made algorithm realization to conductor temperature, and by the expert software analytic system temperature controlled temperature data and historical record are preserved automatically, finish the automatic control of cable duty cycle process of the test.
Concrete steps of the present invention are:
The first step: application initialization, the basic parameter of input cable test product is as physical dimension, working voltage grade, cross-sectional area of conductor, temperature controlling range etc.;
Second step: finish the installation of cable loop and the layout in observing and controlling loop, comprise the installation of current measurement and control loop, dedicated temperature sensor and measurement module;
The 3rd step: the initial value that the expert software of application program determines the conductor heating current that cable sample adopts automatically according to the structural parameters and the current environment temperature of cable;
The 4th step: the application program control algolithm is moved automatically, enters temperature rising control model, begins cable loop is heated, and first group of timer picks up counting, and the conductor temperature and the oversheath temperature of real-time monitoring cable test product;
The 5th step: in temperature rising control model process, algorithm enters the current stabilization control module automatically, monitors the actual heating current value of cable loop in real time, and compares by being worth the heating current initial value that generates automatically with algorithm;
The 6th step: if actual current and setting value difference be greater than 50A, algorithm enters the continuous current state of a control, generates the stepless control signal, and the pressure regulator motor that control is relevant is adjusted continuously, and wherein difference is just being changeed for negative then motor, and difference is that the canonical motor reverses;
The 7th step: if actual current and setting value difference be during less than 50A, last continuous current state of a control end enters precision Current Control state;
The 8th step: in the precision Current Control state, if actual current and setting value difference are greater than 5A, algorithm generates a dynamic formula intermittent controlled signal automatically, crawl is 200ms at interval, the pressure regulator motor that control is relevant carries out the precision adjustment control of a dynamic formula, wherein difference is for motor is just changeing in order to bear then, and difference is the counter-rotating of canonical motor;
The 9th step: the heating process of the duty cycle each time from automatic control process begins, and the current stabilization control module of algorithm repeats the content in the 5th step to the 8th step near end, suspends until the heating process of duty cycle each time;
The tenth step: in temperature rising control model, algorithm calculates the temperature control point that the beginning electric current is adjusted automatically, and this temperature spot is determined by the structural parameters of environment temperature, conductor equilibrium temperature and cable;
The 11 step: when monitored cable conductor temperature reached the temperature control point of algorithm setting, algorithm entered automatic tracking Control pattern, begins to carry out the control algolithm of conductor temperature automatic following module;
The 12 step: algorithm calculates current conductor temperature rate of change according to the current temperature data in reference mark and the difference of a preceding temperature data;
The 13 step: temperature data and the historical temperature data of the first five time that algorithm is current according to the reference mark, the analytical calculation Current Temperatures is put the moving invariant feature amount of history curve of living in;
The 14 step: the amplitude that algorithm should be adjusted according to current real time temperature data, conductor temperature rate of change and moving invariant feature amount calculating conductor electric current;
The 15 step: electric current is adjusted the electric current automatic tracking module output control signal complete operation of amplitude by algorithm;
The 16 step: before the cable conductor temperature arrived automatic controlled target, algorithm repeated the operation in the 12 step to the 15 step every 5min;
The 17 step: after the cable conductor temperature arrived automatic controlled target scope, second group of timer of algorithm picked up counting, and enters the temperature stabilization control model;
The 18 goes on foot: algorithm calculates the interior at interval rate temperature change of each group, the moving invariant feature amount of temperature with the shorter time interval and new control constant, and the amplitude of definite heating current adjustment size, is finished by the control output unit;
The 19 step: before second group of timer time limit arrived, algorithm fully carried out the control content in the 18 step, arrived until second group of timer time limit, entered the cooling control model;
The 20 step: in the cooling control model, algorithm generates the stepless control signal, makes source current safety drop to spacing value back disjunction power supply;
The 21 step: before first group of timer time limit arrived, algorithm repeated the control content in the 5th step to the 20 step, finishes until this content of the test.
Algorithm part of the present invention is by the Delphi language compilation, adopt two groups of timer T1, T2 in the algorithm, two groups of integer variable i, n, 1 group of floating type variable s, two groups of definition integer variable Heat_test, A_setting, 9 group length are integer array ch0～ch8 of 200, one group of 9 dimension group chnum, 3 group of 1000 dimension group Data0, Data1, Data2.Wherein, the concrete grammar of current acquisition subalgorithm is in the current stabilization control module:
1, data acquisition card initialization, capture card base address 300H, interrupt levels IRQ=9, effectively acquisition channel 0～9 is gathered gain 1.25V, and the FIFO trigger mode is an internal trigger, crystal oscillator trigger 1 mode of operation 5, trigger 2 mode of operations 4, the capture card sample frequency is 50K;
2, Digital I/O control card initialization, base address 2C0H, port A address is that 2C0H is low eight, and port B address is low four of 2C0H high four and 2C1H, and port C address is the 2C1H high eight-bit, the original state zero clearing;
3, data acquisition timer T1 run time version content: base address+25 assignment is 1, after the FIFO zero clearing, is 0 with base address+15 assignment, makes capture card crystal oscillator trigger begin image data;
4, behind the 500ms of action interval, data acquisition timer T1 run time version content: with base address+15 assignment is 1, suspends capture card crystal oscillator trigger process, so that subsequent algorithm is extracted about data cached;
5, tie up buffer memory array ch0～ch8 zero clearing for 9 of algorithm real effective computing module group 200, be used to store 9 dimension group chnum zero clearings of each acquisition channel valid data number, 3 group of 1000 dimension group Data0, Data1, Data2 zero clearing;
6, read base address+23 state, equal 0 and begin to read data fifo, otherwise return;
7, read data cached among the FIFO with the Data0 array, lay respectively at base address+23 (low byte) and base address+24 (high byte);
8, read the mistake zero-bit modified value of each element in the Data0 array with the Data1 array, method is data1[i] :=round (data0[i]/16)-2048, wherein i is an integer variable, span 0～999;
9, read the gap marker of each element among the Data0 with array Data2, method is: data2[i] :=data0[i] mod 16, wherein i is an integer variable, span 0～999;
10, with the gap marker of the element in the Data1 array according to Data2 array correspondence, be stored to 200 dimension buffer memory arrays of each passage respectively, with passage 0 is example, method is: if Data2[i]=0 then ch0[chnum[0]] :=Data1[i]/2048, chnum[0] :=chnum[0]+1.Wherein, chnum[0] initial value is 0, i is an integer variable, span 0～999 is whenever adopted in the ch0 array into an element, chnum[0] and add 1 certainly, can travel through and collect passage 0 data all in 1000 data like this, and order is adopted the array into ch0;
11, calculate the true useful signal value of each acquisition channel.With passage 0 is example, and the real effective algorithm of the total data in the ch0 array according to AC signal calculated, and the principle formula is
Wherein the n value is the valid data number of ch0 array, and implementation method is: s:=0; For i:=0 to n dos:=s+ch0[i] * ch0[i]; S:=s/100; S:=sqrt (s);
12, the image data of this passage be multiply by the signal no-load voltage ratio of this passage, draw actual image data, implementation method is: HeatA_test:=s*0.625*8000, wherein HeatA_test is the variable of real-time storage cable heating current numerical value, 0.625 be the inside no-load voltage ratio of this passage, 8000 is the outside no-load voltage ratio of this passage;
13, successively each current data and relevant voltage data being carried out effective value calculates;
14, after data acquisition was finished, data acquisition timer T1 run time version content: with base address+15 assignment was 0, restarts capture card crystal oscillator trigger process, continued to gather;
15, carry out at data acquisition timer T1 in the repetitive process of " suspending--calculating--starts ", control signal output timer T2 parallel running, and carry out following operation;
16, control signal output timer T2 reads the actual current value HeatA_test of current cable heating, and compare with algorithm setting value A_setting, if absolute difference, then produces the output of stepless control signal greater than 50, when reading collection numerical value next time, T2 compares once more.Wherein difference is then just being changeed for negative, and difference is the canonical counter-rotating, and bigger than normal with electric current, the pressure regulator motor need be reversed to example, and implementation method is: HeatA_test＞A_setting+50then Command (104), Command (104) are motor inverted rotor function;
17, if the absolute difference of HeatA_test and A_setting during less than 50 but greater than 5A, algorithm produces " some dynamic formula " and is interrupted control signal, the accurate control of realization electric current.Less than 50A but greater than 5A, the pressure regulator motor need be put dynamic formula and be reversed to example with difference, and implementation method is: if (HeatA_test＞(A_setting+5)) and (HeatA_dummy＜(A_setting+50))) then beginCommand (104); Sleep (200); Command (105), wherein Command (104) is a motor inverted rotor function, Command (105) is the motor function that stops operating;
18, when the absolute difference of HeatA_test and A_setting during less than 5A, algorithm generates the electric current function that stops operating, and implementation method is: if abs (HeatA_test-A_setting)＜5then Command (105);
19, algorithm repeated for the 16 step when control signal output timer T2 moves at every turn
To the content in the 18 step, realize " current stabilization automatic control module " major function.In addition, algorithm at " tracking Control pattern automatically " concrete grammar of temperature is:
1, the conductor temperature of the real-time monitoring cable of algorithm begins to descend column count and control signal output content after reaching temperature control point;
2, algorithm is gathered the real time temperature t0 of the current point in time of conductor;
3, store the temperature data of the first five of point automatically time storage time, by current point in time from closely being followed successively by t1, t2, t3, t4 and t5 to order far away;
4, calculate the rate of change of Current Temperatures, the calculating principle is s1=(t1-t0)/tm, and wherein tm is the gap length of adjacent time point;
5, calculate the moving invariant feature amount of temperature of current point in time, the calculating principle is s2=abs ((t0-t5)/2-(t0+t1+t2+t3+t4+t5)/6);
6, the heating current that calculates current point in time is adjusted amplitude, wherein Δ I=func (I0, t0, s1, s2, t_now), thresholding when revising heating current setting value I_setting. wherein t_now being second set of counters current;
7, finish relevant computing and control signal corresponding output according to the real-time heating current HeatA_test of cable with the difference of setting value A_setting by " current stabilization control module ".
The content institute and this area professional and technical personnel's known prior art that are not described in detail in this instructions.
Claims (6)
1. power cable conductor temperature automatic following and control method, on hardware by data processing unit, data acquisition unit, the control output unit constitutes, logically by temperature rising control model, automatic tracking Control pattern, temperature stabilization control model and cooling control model are formed, it is characterized in that: gather the heating current data and the temperature data of cable conductor in real time and feed back to data processing unit by data acquisition unit, data processing unit is according to the definite adjustment amplitude that should implement of software algorithm, and by control output unit finish practical operation, finish the full-automatic tracking control of cable conductor temperature, concrete grammar is:
First step: after the cable test product of testing installs, the elementary structure parameter of cable is set, to determine the initial heating current of cable test product conductor under current environment;
Second step: the heating process of cable test product begins automatic operation, and when beginning first batch total and enter temperature rising control model, heating current in the cable conductor and conductor temperature will begin to be gathered and feed back to data processing unit in real time by data acquisition unit;
Third step: after the conductor temperature of cable reaches the eigenwert of algorithm dictates, enter automatic tracking Control pattern, begin to the cable conductor temperature before this climbing speed and the characteristic quantity of temperature history curve calculate, determine the amplitude adjustment size that the cable conductor heating current need carry out, and finish by the control output unit;
The 4th step: every particular time interval, repeat the calculating content and the control output content of third step, guarantee that the temperature of cable conductor is approached controlled target according to normal trend;
The 5th step: when the conductor temperature of cable reached in the controlled target allowed band, when beginning second batch total, heating current entered the temperature stabilization control model simultaneously;
The 6th step: second group of timer time arrives, and begins to enter the cooling control model, and safety reduces heating current and disjunction power supply;
The 7th step: carry out the control procedure of stipulated number automatically, finish until content of the test.
2. a kind of power cable conductor temperature automatic following as claimed in claim 1 and control method is characterized in that: the concrete grammar of conductor temperature collection is in second step:
The 1st step: the user is manual or begin the collection of temperature automatically;
The 2nd step: the initialization PORT COM, comprise the baud rate of setting port, parity check bit, and scan channel marking variable ch is initialized as 0;
The 3rd step: send the instruction of gathering ch channel temperature data to PORT COM, simultaneous temperature is gathered timer and is picked up counting;
The 4th step: PORT COM begins data and waits for;
The 5th step: judge whether PORT COM receives return data,, judge otherwise carry out the communication time-delay if receive that data then enter the information processing function;
The 6th step: if the communication time-delay does not surpass setting value, then timer adds 1, proceeds the PORT COM data and waits for, otherwise be judged as communication time-delay fault, enters temperature acquisition self-starting function;
The 7th step: if port is received return data, judged whether external user request interruption temperature acquisition after data processing is finished,, otherwise continued the next temperature acquisition passage of scanning if then interrupt gathering;
The 8th step: the content that repeats the 3rd step to the 7th step.
3. a kind of power cable conductor temperature automatic following as claimed in claim 1 and control method is characterized in that: the concrete grammar of heating current collection is in second step:
The 1st step: data acquisition card initialization, capture card base address 300H, interrupt levels IRQ=9, effectively acquisition channel 0～9 is gathered gain 1.25V, and the FIFO trigger mode is an internal trigger, crystal oscillator trigger 1 mode of operation 5, trigger 2 mode of operations 4, the capture card sample frequency is 50K;
The 2nd step: the initialization of numeral (Digital) I/O control card, base address 2C0H, port A address is low eight of 2C0H, and port B address is low four of 2C0H high four and 2C1H, and port C address is the 2C1H high eight-bit, the original state zero clearing;
The 3rd step: data acquisition timer T1 run time version content: base address+25 assignment is 1, after the FIFO zero clearing, is 0 with base address+15 assignment, makes capture card crystal oscillator trigger begin image data;
The 4th step: behind the 500ms of action interval, data acquisition timer T1 run time version content: with base address+15 assignment is 1, suspends capture card crystal oscillator trigger process, so that the subsequent algorithm extraction is relevant data cached;
The 5th step: tie up buffer memory array ch0～ch8 zero clearing, be used to store 9 dimension group chnum zero clearings of each acquisition channel valid data number, 3 group of 1000 dimension group Data0, Data1, Data2 zero clearing for 9 group 200 of algorithm real effective computing module;
The 6th step: read base address+23 state, equal 0 and begin to read data fifo, otherwise return;
The 7th step: read data cached among the FIFO with the Data0 array, lay respectively at the high byte of the low byte of base address+23 and base address+24;
The 8th step: the mistake zero-bit modified value that reads each element in the Data0 array with the Data1 array, method is: with each the element data0[i in the Data0 array] divided by 16 and round after deduct range amplitude 2048, and give corresponding element data1[i in the Data1 array with the calculation value assignment] (data1[i] :=round (data0[i]/16)-2048), wherein i is an integer variable, span 0～999;
The 9th step: the gap marker that reads each element among the Data0 with array Data2, method is: with each the element data0[i in the Data0 array] logarithm value 16 gets remainder, and give corresponding element data2[i in the Data2 array with the calculation value assignment] (data2[i] :=data0[i] mod16), wherein i is an integer variable, span 0～999;
The 10th step: with the gap marker of the element in the Data1 array according to Data2 array correspondence, be stored to 200 dimension buffer memory arrays of each passage respectively, with passage 0 is example, method is: to i element Data1[i in the Data1 array], if the element gap marker Data2[i of correspondence in the Data2 array] be zero, promptly think these data Data1[i] be the image data of zero passage correspondence, then with these data divided by range amplitude 2048 back order deposit in passage zero corresponding cache array ch0 ((if) Data2[i]=0 (then) ch0[chnum[0]] :=Data1[i]/2048, chnum[0] :=chnum[0]+1), wherein, chnum[0] initial value is 0, i is an integer variable, span 0～999, whenever adopt in the ch0 array into an element, chnum[0] add 1 certainly, can travel through and collect passage 0 data all in 1000 data like this, and order is adopted the array into ch0;
The 11st step: calculating the true useful signal value of each acquisition channel, is example with passage 0, and the real effective algorithm of the total data in the ch0 array according to AC signal calculated, and the principle formula is
Wherein the n value is the valid data number of ch0 array, and implementation method is: with the square value of valid data in the ch0 array that adds up successively after the variable s zero clearing, divided by the squared root (s:=0 in number 100 backs of effective ergodic data; For i:=0to n dos:=s+ch0[i] * ch0[i]; S:=s/100; S:=sqrt (s));
The 12nd step: the signal no-load voltage ratio that the image data of this passage be multiply by this passage, draw actual image data, implementation method is: the product (HeatA_test:=s*0.625*8000) that variable s be multiply by channel interior no-load voltage ratio and outside no-load voltage ratio, wherein HeatA_test is the variable of real-time storage cable heating current numerical value, 0.625 be the inside no-load voltage ratio of this passage, 8000 is the outside no-load voltage ratio of this passage;
The 13rd step: successively each current data and relevant voltage data are carried out effective value and calculate.
4. a kind of power cable conductor temperature automatic following as claimed in claim 1 and control method is characterized in that: the concrete grammar of temperature rising control model is:
The 1st step: enter the current stabilization control module automatically, monitor the actual heating current value of conductor of cable loop in real time, and by should value and the heating current setting value compare;
The 2nd step: if actual heating current value and setting value difference enter the continuous current state of a control greater than 50A, generate the stepless control signal, the pressure regulator motor that control is relevant is adjusted continuously, and wherein difference is just being changeed for negative then motor, and difference is the counter-rotating of canonical motor;
The 3rd step: if actual heating current value and setting value difference be during less than 50A, last continuous current state of a control end enters precision Current Control state;
The 4th step: in the precision Current Control state, if actual heating current value and setting value difference are greater than 5A, automatically generate some dynamic formula intermittent controlled signal, crawl is 200ms at interval, the pressure regulator motor that control is relevant carries out the precision adjustment control of a dynamic formula, wherein difference is just being changeed for negative then motor, and difference is the counter-rotating of canonical motor;
The 5th step: the heating process of the duty cycle each time from control procedure begins, and the current stabilization control module repeats the first step to the content in four steps near end, suspends until the heating process of duty cycle each time;
The 6th step: calculate the temperature control point that the beginning electric current is adjusted, this temperature spot is determined by the structural parameters of environment temperature, conductor equilibrium temperature and cable.
5. a kind of power cable conductor temperature automatic following as claimed in claim 1 and control method is characterized in that: the concrete grammar of temperature stabilization control model is:
The 1st step: with than shorter time interval of the timing time of second group of timer and new control constant, the interior at interval rate temperature change of each group, the moving invariant feature amount of temperature are calculated, and the amplitude of definite cable conductor heating current adjustment size, finish by the control output unit;
The 2nd step: before second group of timer time limit arrives, fully carry out the control content of the first step, arrive until second group of timer time limit.
6. a kind of power cable conductor temperature automatic following as claimed in claim 1 and control method is characterized in that: the concrete grammar of cooling control model is: generate the stepless control signal, make source current safety drop to spacing value back disjunction power supply.
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| CN102707105A (en) * | 2012-04-27 | 2012-10-03 | 中国电力科学研究院 | Generating device of simulated load current of cable conductor |
| JP6128055B2 (en) * | 2014-05-22 | 2017-05-17 | 住友電装株式会社 | Wire protector |
| CN105185053B (en) * | 2015-09-29 | 2017-07-25 | 国网上海市电力公司 | A kind of indoor current caused hot type device temperature alarm method |
| CN105471548B (en) * | 2015-11-04 | 2018-11-23 | 中国直升机设计研究所 | A kind of network data Packet analyzing and distribution method |
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