CN201611798U - Dynamic control circuit used for power load management terminal to prevent remote-control unwanted tripping - Google Patents
Dynamic control circuit used for power load management terminal to prevent remote-control unwanted tripping Download PDFInfo
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- CN201611798U CN201611798U CN2009202670055U CN200920267005U CN201611798U CN 201611798 U CN201611798 U CN 201611798U CN 2009202670055 U CN2009202670055 U CN 2009202670055U CN 200920267005 U CN200920267005 U CN 200920267005U CN 201611798 U CN201611798 U CN 201611798U
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Abstract
The utility model relates to a dynamic control circuit used for a power load management terminal, which can prevent the remote-control unwanted tripping. The dynamic control circuit is connected between a terminal main control board and a terminal interface board, and a remote-control tripping line and a remote-control status line are connected between the terminal main control board and the terminal interface board. The dynamic control circuit comprises a main input terminal, a main output terminal and a control terminal, wherein the main input terminal is connected with the master control line of the terminal main control board, the main output terminal is connected with the master control line of the terminal interface board, and the control terminal is connected with a dynamic control signal from the terminal main control board. The dynamic control circuit can judge whether the microcontroller of the terminal main control board works normally by identifying whether the frequency of the dynamic control signal is within a predetermined range of normal frequency, thereby preventing the unwanted tripping caused by the program run-away and other accidents of the microcontroller.
Description
Technical field
The utility model relates to electricity load management terminal, especially relates to the dynamic circuit that prevents the remote control mistrip in the electricity load management terminal.
Background technology
Electricity load management terminal generally all is installed on each industrial enterprise, and the remote control output of terminal connects the line switching of each enterprise, controls production electricity consumption and household electricity respectively.Usually, by its omnidirectional antenna, send various command by the master station of Utilities Electric Co. to the electricity load management terminal that is positioned at each industrial enterprise.Terminal receives the guidance command of master station, and the electricity consumption data of each industrial enterprise are also gathered in opening and closing of control institute control line switching simultaneously, report master station, as the foundation of Utilities Electric Co.'s administration of power networks.
Utilities Electric Co. needs each power consumption with electric unit of control when power load is bigger, guarantee residential electricity consumption.At present, electric company realizes ordered electric by the remote control trip circuit of electricity load management terminal, the total load of allotment electrical network.
The remote control trip circuit of existing electricity load management terminal is directly to trip by the IO mouth line driving realization remote control of MCU (micro-control unit), and its concrete control principle block diagram comprises Terminal Interface Board 12 and terminal master control borad 10 as shown in Figure 1.Wherein each circuit, tripping operation, state are defined as follows:
Master control line: the master control switch that drives the remote control tripping operation;
Remote control tripping operation 1: expression first round tripping operation;
Remote control tripping operation 2: tripping operation is taken turns in expression second;
Remote control tripping operation n: represent the tripping operation of n wheel;
Remote state 1: detect first round tripping operation and whether move;
Remote state 2: whether detection second is taken turns tripping operation and is moved;
Remote state n: detect the tripping operation of n wheel and whether move.
When existing circuit needed the remote control tripping operation, MCU drove remote control tripping operation drive wire earlier, read the state of remote state line again, if above-mentioned steps and state are correct, then MCU output master control signal is finished the tripping operation action; If detect incorrectly, MCU does not then export master control signal, can't carry out the remote control tripping operation.
But the shortcoming of existing trip circuit is: fly or during the unexpected power down of master control borad because master control borad MCU meets accident to run, might cause the remote control mistrip, this is unallowed to Utilities Electric Co. and user, because the consequence that the electricity load management terminal mistrip is caused also is very serious.
The utility model content
Technical problem to be solved in the utility model provide a kind of be used for electricity load management terminal prevent remote control mistrip dynamic circuit, even under the situation of the microcontroller program fleet of master control borad, can not cause the remote control mistrip yet.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of dynamic control circuit that prevents the remote control mistrip that is used for electricity load management terminal, be connected between a terminal master control borad and the Terminal Interface Board, be connected with remote control tripping operation line and remote state line between this terminal master control borad and this Terminal Interface Board, this dynamic control circuit has a primary input end, an one main output and a control end, this primary input end connects the master control line of this terminal master control borad, this main output connects the master control line of this Terminal Interface Board, this control end connects the dynamic control signal from this terminal master control borad, and this dynamic control circuit comprises:
First frequency discriminator, its input connects this control end, and this first frequency discriminator is in order to differentiating the frequency of this dynamic control signal, and when the frequency of this dynamic control signal is higher than under the predeterminated frequency in limited time, this first frequency discriminator produces also exports one first enable signal;
Second frequency discriminator, its input connect the output of this control end and this first frequency discriminator, and this second frequency discriminator is worked when receiving this enable signal, to differentiate the frequency of this dynamic control signal; When the frequency of this dynamic control signal is lower than on the predeterminated frequency in limited time, this second frequency discriminator produces also exports one second enable signal;
The dynamic current driver, its input connects the output of this second frequency discriminator, and produces an effective switching drive signal when this second frequency discriminator is output as this drive signal; And
The output electronic switch connects this primary input end, this main output and this dynamic current driver respectively, the access path of this output electronic switch this primary input end of conducting and this main output when this switching drive signal is effective.
In above-mentioned dynamic control circuit, this first frequency discriminator comprises the frequency discrimination unit and enables the unit.The input of frequency discrimination unit connects this control end, and produces and export a drive signal that has one first ON time in each cycle based on this dynamic control signal.Enable the unit and connect this drive signal, the frequency of wherein working as this dynamic control signal is higher than the following of a predeterminated frequency scope prescribes a time limit, and this enables the unit and exports this first enable signal.
In above-mentioned dynamic control circuit, the frequency of this second enable signal is identical with dynamic control signal and have one second ON time, and the frequency of working as this dynamic control signal is higher than on this predeterminated frequency prescribes a time limit, and this second frequency discriminator produces also exports a constant level signal.
In above-mentioned dynamic control circuit, this frequency discrimination unit comprises monostable circuit, and wherein the timing end of this monostable circuit has electric capacity and the resistance of determining described first ON time.
In above-mentioned dynamic control circuit, this enables the unit and comprises the RC charging circuit.
In above-mentioned dynamic control circuit, this second frequency discriminator comprises monostable circuit, and wherein the timing end of this monostable circuit has electric capacity and the resistance of determining described second ON time.
In above-mentioned dynamic control circuit, also comprise an input electronic switch, be connected between this control end and this first frequency discriminator, and between this control end and this second frequency discriminator.
The utility model is owing to adopt above technical scheme, make it compared with prior art, by the setting of dynamic control circuit, even can make electricity load management terminal under the situation of the program fleet of master control borad microcontroller, can not cause the remote control mistrip yet, guarantee user's Electrical Safety.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is existing remote control tripping operation control circuit block diagram.
Fig. 2 is the remote control tripping operation control circuit block diagram of the utility model one embodiment.
Fig. 3 is the anti-remote control mistrip dynamic driving control circuit block diagram of the utility model one embodiment.
Fig. 4 is the dynamic control circuit figure of the utility model one embodiment.
Fig. 5 illustrates the control timing of microcontroller dynamic control circuit shown in Figure 4 when normal operating conditions.
Fig. 6 illustrates the control timing that microcontroller does not send data and microcontroller dynamic control circuit shown in Figure 4 under abnormal operating state.
Fig. 7 illustrates the control timing of microcontroller dynamic control circuit shown in Figure 4 under non operating state.
Embodiment
Fig. 2 is the anti-remote control mistrip dynamic driving control circuit block diagram of the utility model one embodiment.With reference to shown in Figure 2, in the present embodiment, for the purpose of compatibility and save design, Terminal Interface Board 22 can be consistent with available circuit shown in Figure 1 with terminal master control borad 20.Wherein terminal master control borad 20 is provided with microcontroller 21.Different is, outputs at terminal master control borad 20 on the master control line of Terminal Interface Board to add dynamic control circuit 24.
Remote control tripping operation line 1...n is connected with the IO line of microcontroller 21; The 1...n of remote state also is connected with microcontroller 21, reads the state of remote control tripping operation for microcontroller 21.
" the master control line 1 " of dynamic control circuit connects an IO mouth of microcontroller 21 among Fig. 2, when microcontroller 21 needs external remote control to trip, and master control line 1 control line output high level; Master control line 1 output low level when not needing the remote control tripping operation.
The master-plan of present embodiment is: when terminal needs the remote control tripping operation, and master control line 1 output high level, this signal demand just can be reflected to master control line 2 by the dynamic control circuit 24 with electronic switch.In master control line 1 output high level, microcontroller is exported a dynamic control signal simultaneously on the dynamic driving line.In one embodiment, this dynamic control signal is the square-wave signal of 500Hz.Dynamic control circuit 24 just can be opened electronic switch after receiving the drive signal of 500Hz, allows the high level of master control line 1 to be transferred to master control line 2.
Specifically, by the function of dynamic control circuit, under following situation, (low level) closed in 2 outputs of master control line, forbids the remote control tripping operation:
1, if master control line 1 is a high level, and microcontroller 21 is not exported square-wave signal at the dynamic driving line, and then the control gate of dynamic control circuit 24 keeps closed condition, master control line 2 outputs to keep low level output, forbids the remote control tripping operation;
2, if master control line 1 is a high level, and microcontroller 21 dynamic driving lines output square-wave signal frequency during greater than 1500Hz (this situation be likely microcontroller program walk to fly or something unexpected happened), then the control gate of dynamic control circuit 24 keeps closed condition, master control line 2 outputs are kept low level output, forbid the remote control tripping operation;
3, if master control line 1 is a high level, and microcontroller 21 dynamic driving lines output square-wave signal frequency during less than 250Hz (this situation be likely microcontroller program walk to fly or something unexpected happened), then the control gate of dynamic control circuit 24 keeps closed condition, master control line 2 outputs are kept low level output, forbid the remote control tripping operation;
4, master control line 1 is a low level, and the normal square-wave signal of microcontroller 21 outputs, then the control gate of dynamic control circuit 24 is opened, but because master control line 1 output is a low level, therefore on master control line 2 outputs of dynamic control circuit 24, still keep low level, forbid the remote control tripping operation;
5, microcontroller 21 parts outage, and Terminal Interface Board 22 power supplys are normal.In this case, because dynamic control circuit 24 is provided with an electronic switch on the circuit that outputs to master control line 2, this electronic switch is in closed condition, therefore still keeps low level on master control line 2 outputs of dynamic control circuit 24, forbids the remote control tripping operation.
Present embodiment comes down to frequency by the dynamic control signal of differentiating microcontroller and reaches above-mentioned functions.The operation principle of dynamic control circuit is described below with reference to Fig. 3.This dynamic control circuit 24 comprises input electronic switch 40, first frequency discriminator 42, second frequency discriminator 44, dynamic current driver 46 and output electronic switch 48.Input electronic switch 40 is the input buffering levels as circuit 34.
The enable signal EN1 of first frequency discriminator, 42 outputs is used for enabling second frequency discriminator.
Dynamic current driver 46 connects second frequency discriminator 44, and only just can produce an effective switching drive signal Gate when second frequency discriminator is output as the second enable signal EN2, and it for example is a high level.And output electronic switch 48 connects input master control line 1, output master control line 2 and the dynamic current driver 46 of dynamic control circuit 34 respectively, and output electronic switch 48 just makes the access path conducting between input master control line 1 and the output master control line 2 when switching drive signal is effective.
So, when having only frequency when dynamic control signal in normal range (NR) 250Hz～1500Hz, just can make input master control line 1 and 2 conductings of output master control line, therefore under situation such as 20 power down of terminal master control borad or program fleet, its high level signal by 1 output of master control line can't conduct to master control line 2, thereby avoids Terminal Interface Board 22 that mistrip takes place.
In addition, output master control line 2 is passed through pull down resistor in Terminal Interface Board 22, normally to low level, and the mistrip to avoid terminal master control borad 20 power down under some extreme case under the Terminal Interface Board 22 normal power supply situations.
More further specify specific embodiment of the utility model with the circuit of a reality below, please refer to shown in Figure 4ly, its detailed operation principle is divided into four kinds of situations and is illustrated:
One, microcontroller is in normal operating conditions, the working condition of dynamic control circuit during the remote control tripping operation
" CTRDPC " is the signal that outputs to dynamic control circuit 24 from an IO mouth of microcontroller 21, and when microcontroller 21 output remote control tripping operation actions, frequency of " CTRDPC " output is the square-wave signal about 500Hz." CTRDPC " is connected to resistance R 1.Resistance R 1, R2, R3, triode V1 form input electronic switch 40 as shown in Figure 3, and the waveform frequency between the input and output of this input electronic switch 40 is identical, and just phase place is opposite.
" CTRDPC " signal is input to first frequency discriminator 42 after importing electronic switch 40.First frequency discriminator 42 is made up of monostable circuit D1A, resistance R 4, capacitor C 1, resistance R 5 and capacitor C 2.Wherein monostable circuit D1A, resistance R 4, capacitor C 1 are formed the frequency discrimination unit of first frequency discriminator 42, and the charging circuit formation that resistance R 5, capacitor C 2 are formed enables the unit.In addition, monostable circuit D1B, resistance R 6 and capacitor C 3 are formed second frequency discriminator 44.
Wherein circuit D1A, D1B are to use a slice two-way monostable integrated circuit 74HC4538, and its configuration mode is: 5 pin of D1A are the pulse input signal trailing edge trigger end of monostable circuit, connect high level (not using) now; 3 pin of D1A are the set end of monostable circuit, connect high level (not using) now; 1 pin of D1A is the discharge end of monostable circuit, ground connection; 4 pin of D1A are the pulse input signal rising edge trigger end of monostable circuit; 6 pin of D1A are the output of monostable circuit; 2 pin of D1A are the output pulse timing end of monostable circuit.11 pin of D1B are the pulse input signal trailing edge trigger end of monostable circuit, and 13 pin of D1B are the set end of monostable circuit, connect high level (not using) now; 15 pin of D1B are the discharge end of monostable circuit, ground connection; 12 pin of D1B are the pulse input signal rising edge trigger end of monostable circuit; 10 pin of D1B are the in-phase output end of monostable circuit; 14 pin of D1B are the output pulse timing end of monostable circuit.
The operation principle of first frequency discriminator 42 is: when rising edge occurring on 4 pin of D1A (monostable circuit is operated in rising edge and triggers) at every turn, monostable circuit just triggers once, the 6 pin output high level of D1A, the duration of output high level is the τ (very first time constant of R4 * C1), through behind the very first time constant, the 6 pin output low levels of D1A (high level and low level duty ratio are calculated through strict), the 6 pin output waveforms of D1A as shown in Figure 5, the signal frequency identical (and then identical) of its frequency and 4 pin of D1A with the dynamic control signal frequency, and its ON time (being called first ON time at this) is determined by this very first time constant.
Behind the 6 pin output square wave of D1A, by 2 chargings of 5 pairs of capacitor C of resistance R, capacitor C 2 is by resistance R 5 discharges when low level when high level.Capacitor C 2 charge and discharge process produce waveform as shown in Figure 5 on D1 11 pin." CTRDPC " is when just beginning input pulse, starting voltage is that 0V begins charging on D1B 11 pin, because the duty ratio of D1A 6 pin output waveforms is bigger, therefore the voltage on D1B 11 pin increases along with umber of pulse and rises, when this voltage rises to the D1B threshold values when above, the door of D1B can be opened, and the operation principle of D1B is identical with D1A, at this repeated description not, D1B output high level lasting time is the τ (time constant of R6 * C3).Output waveform as shown in Figure 5 on D1B 10 pin.The frequency of output waveform is identical with D1A 4 pin on D1B 10 pin, and phase place is identical, unique different be the duty ratio difference.
The resistance R 9 of dynamic current driver 46 is received in the output (DPCOUT) of monostable circuit D1B 10 pin.Resistance R 7, R8, R9, R10, diode V2, triode V3 form a dynamic current driver 46.When D1B 10 pin output low levels, triode V3 ends, and to capacitor C 4 chargings, capacitor C 4 is full of power supply VCC very soon by diode V2, resistance R 7, R8; When D1B 10 pin output high level, triode V3 conducting, capacitor C 4 is charged to capacitor C 5 by triode V3.In capacitor C 4 discharge processes, diode V5 oppositely ends, the discharging current of capacitor C 4 all is sent on the capacitor C 5, because of the plus earth of capacitor C 5, in capacitor C 4 discharge processes, capacitor C 5 cathode voltages can not rise, therefore capacitor C 5 cathode voltages are toward descending, because be provided with triode V4 in the circuit, in capacitor C 4 discharge processes, triode V4 ends.Along with the further decline of capacitor C 5 cathode voltages, photoelectrical coupler D2 will conducting, opens output electronic switch 48 after the D2 conducting.After square-wave signal occurring on monostable circuit D1B 10 pin, the appearance said process that goes round and begins again on capacitor C 4 will soon reach the condition of enough triggering photoelectrical coupler D2 conducting on the capacitor C 5.
Output electronic switch 48 is made up of photoelectrical coupler D2, resistance R 13, R14, R15, diode V6, triode V7.After the photoelectrical coupler D2 conducting, D24 pin output low level, but also conducting of diode V6; But also conducting of triode V7 after the diode V6 conducting.Microcontroller 21 serial line interface master control lines 1 are connected on the emitter of triode V7, the collector electrode that Terminal Interface Board master control line 2 is connected on triode V7.After triode V7 conducting, the state of microcontroller serial line interface master control line 1 just can be reacted on the master control line 2 of Terminal Interface Board 22.
Two, analyze now: microcontroller is not exported remote control tripping operation action and microcontroller under abnormal operating state, the working condition of dynamic control circuit when " CTRDPC " output frequency is too low in normal operation.
In fact, the working condition of dynamic control circuit was not the same when microcontroller did not send data " CTRDPC " output frequency is too low under abnormal operating state with microcontroller, the former is a kind of extreme case of the latter, and dynamic control circuit each point waveform as shown in Figure 6.
When the frequency of " CTRDPC " input pulse signal is too low, because the timeconstant (R4 * C1) constant of monostable circuit D1A, at " CTRDPC " input pulse also when continuing high level, resistance R 4, capacitor C 1 discharge finish already, the time of monostable circuit D1A 6 pin output high level is constant, but the duty ratio of output waveform changes, as shown in Figure 6.Because the duty ratio of monostable circuit D1A 6 pin output waveforms diminishes, therefore the charging interval of capacitor C 2 is shorter, discharge time is longer, the super only threshold voltage of monostable circuit D1B thresholding (as shown in Figure 6) of the crest voltage of capacitor C 2, the door of monostable circuit D1B is closed, and the output of monostable circuit D1B 10 pin is constant to be low level (as shown in Figure 6).
Because D1B 10 pin constant output low levels, triode V3 is in cut-off state all the time, causes capacitor C 4 not have discharge loop, and capacitor C 5 does not have charge circuit, and photoelectrical coupler D2 is in cut-off state all the time.As long as photoelectrical coupler D2 is in cut-off state, output electronic switch 48 is not just opened, and the state of microcontroller serial line interface master control line 1 can not be reflected on the master control line 2 of Terminal Interface Board.
Can learn that through above-mentioned analysis even this circuit is exported high level at microcontroller master control line 1, as long as microcontroller CTRDPC output frequency is too low, master control line 2 also is in low level state, terminal can not produce remote control tripping operation action.
Three, analyze now: microcontroller under non operating state, " CTRDPC " working condition of dynamic control circuit when output frequency is too high.
When the frequency of " CTRDPC " input pulse signal is too high, because the timeconstant (R4 * C1) constant of D1A, in resistance R 4, when capacitor C 1 discharge does not also finish, the rising edge of second pulse of " CTRDPC " occurs, monostable circuit D1A is triggered again, at this moment, the 6 pin constant output high level (as shown in Figure 7) of monostable circuit D1A.
Because the 6 pin constant output high level of monostable circuit D1A, so be full of electricity on the C2 soon, and C2 do not have discharge loop, keep high level (shown in Fig. 8 D1B 11P waveform), so the door of D1B is opened always always.(R6 * C3) is less than the time constant of D1A, so the phenomenon that D1A heavily triggers also appears in D1B certainly, and D1B 10 pin are constant output high level (as Fig. 8 10P waveform) also at the timeconstant of when design D1B.
Because D1B 10 pin constant output high level, V3 is in conducting state all the time, causes the C4 velocity of discharge far above charging rate, does not therefore have voltage on the positive pole of C4 substantially, and C5 does not have charge and discharge process simultaneously yet, and photoelectrical coupler D2 can conducting yet.Not conducting of photoelectrical coupler, dynamically control output electronic switch is in closed condition, and the state of microcontroller serial line interface master control line 1 can not embody on the Terminal Interface Board master control line 2, and master control line 2 remains low level, thereby avoids the remote control misoperation.
Four, analyze now: but the master control borad power down Terminal Interface Board at microcontroller place continues power supply, the working condition of dynamic control circuit
In the unexpected for a certain reason dead electricity of terminal master control borad 20, but Terminal Interface Board 22 continues under the situation of power supply, dynamic control circuit 24: input electronic switch 40, first frequency discriminator 42, second frequency discriminator 44, dynamic current driver 46 are not worked, output electronic switch 48 cuts out, and master control line 2 lines have pull down resistor in Terminal Interface Board 22 inside.Therefore, Terminal Interface Board 22 can not produce remote control actions.
According to above-mentioned several situation analysis, dynamic control circuit 24 can guarantee that Terminal Interface Board can not produce the remote control misoperation.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection range of the present utility model is worked as with being as the criterion that claims were defined.
Claims (7)
1. dynamic control circuit that prevents the remote control mistrip that is used for electricity load management terminal, be connected between a terminal master control borad and the Terminal Interface Board, be connected with remote control tripping operation line and remote state line between this terminal master control borad and this Terminal Interface Board, this dynamic control circuit has a primary input end, an one main output and a control end, this primary input end connects the master control line of this terminal master control borad, this main output connects the master control line of this Terminal Interface Board, this control end connects the dynamic control signal from this terminal master control borad, it is characterized in that this dynamic control circuit comprises:
First frequency discriminator, its input connects this control end, and this first frequency discriminator is in order to differentiating the frequency of this dynamic control signal, and when the frequency of this dynamic control signal is higher than under the predeterminated frequency in limited time, this first frequency discriminator produces also exports one first enable signal;
Second frequency discriminator, its input connect the output of this control end and this first frequency discriminator, and this second frequency discriminator is worked when receiving this enable signal, to differentiate the frequency of this dynamic control signal; When the frequency of this dynamic control signal is lower than on the predeterminated frequency in limited time, this second frequency discriminator produces also exports one second enable signal;
The dynamic current driver, its input connects the output of this second frequency discriminator, and produces an effective switching drive signal when this second frequency discriminator is output as this drive signal; And
The output electronic switch connects this primary input end, this main output and this dynamic current driver respectively, the access path of this output electronic switch this primary input end of conducting and this main output when this switching drive signal is effective.
2. dynamic control circuit as claimed in claim 1 is characterized in that, this first frequency discriminator comprises:
The frequency discrimination unit, its input connects this control end, and produces and export a drive signal that has one first ON time in each cycle based on this dynamic control signal; And
Enable the unit, connect this drive signal, the frequency of wherein working as this dynamic control signal is higher than the following of a predeterminated frequency scope prescribes a time limit, and this enables the unit and exports this first enable signal.
3. dynamic control circuit as claimed in claim 1, it is characterized in that, the frequency of this second enable signal is identical with dynamic control signal and have one second ON time, and the frequency of working as this dynamic control signal is higher than on this predeterminated frequency prescribes a time limit, and this second frequency discriminator produces also exports a constant level signal.
4. dynamic control circuit as claimed in claim 2 is characterized in that, this frequency discrimination unit comprises monostable circuit, and wherein the timing end of this monostable circuit has electric capacity and the resistance of determining described first ON time.
5. dynamic control circuit as claimed in claim 2 is characterized in that, this enables the unit and comprises the RC charging circuit.
6. dynamic control circuit as claimed in claim 3 is characterized in that, this second frequency discriminator comprises monostable circuit, and wherein the timing end of this monostable circuit has electric capacity and the resistance of determining described second ON time.
7. dynamic control circuit as claimed in claim 1 is characterized in that, also comprises an input electronic switch, be connected between this control end and this first frequency discriminator, and between this control end and this second frequency discriminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202670055U CN201611798U (en) | 2009-11-13 | 2009-11-13 | Dynamic control circuit used for power load management terminal to prevent remote-control unwanted tripping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202670055U CN201611798U (en) | 2009-11-13 | 2009-11-13 | Dynamic control circuit used for power load management terminal to prevent remote-control unwanted tripping |
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| CN201611798U true CN201611798U (en) | 2010-10-20 |
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| CN2009202670055U Expired - Fee Related CN201611798U (en) | 2009-11-13 | 2009-11-13 | Dynamic control circuit used for power load management terminal to prevent remote-control unwanted tripping |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064603A (en) * | 2009-11-13 | 2011-05-18 | 上海协同科技股份有限公司 | Dynamic control circuit for preventing remote control incorrect trip of power load management terminal |
| CN110308321A (en) * | 2019-07-05 | 2019-10-08 | 珠海格力智能装备有限公司 | Dynamic current detection method and device |
-
2009
- 2009-11-13 CN CN2009202670055U patent/CN201611798U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064603A (en) * | 2009-11-13 | 2011-05-18 | 上海协同科技股份有限公司 | Dynamic control circuit for preventing remote control incorrect trip of power load management terminal |
| CN110308321A (en) * | 2019-07-05 | 2019-10-08 | 珠海格力智能装备有限公司 | Dynamic current detection method and device |
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Granted publication date: 20101020 Termination date: 20171113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |