CN2770185Y - Intelligent controller for excess current - Google Patents
Intelligent controller for excess current Download PDFInfo
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- CN2770185Y CN2770185Y CN 200520069520 CN200520069520U CN2770185Y CN 2770185 Y CN2770185 Y CN 2770185Y CN 200520069520 CN200520069520 CN 200520069520 CN 200520069520 U CN200520069520 U CN 200520069520U CN 2770185 Y CN2770185 Y CN 2770185Y
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- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model relates to an intelligent controller for excess current, which is suitable for controlling excess current of civil low-voltage electric networks. The intelligent controller is mainly controlled by an SCM, and is provided with two ways of current detection function. Two ways of current are respectively input to two analog input ports of the SCM. An excess current limiting value is arranged through an RS trigger and a key. A circuit is provided with an LED display circuit which displays an arranged current value when arranged and displays a working current value when working. Two ways of interfaces of the SCM drive a relay through transistors, and drive an alarm buzzer through the transistors. Once the current in the circuit exceeds a limitation, the intelligent controller immediately gives an alarm and cuts off the main circuit. The utility model has the advantages of simple circuit, low price and convenient operation.
Description
One, technical field
The utility model relates to a kind of intelligence and crosses flow control device, is particularly useful for civilian low voltage electric network and crosses current control, also is applicable to the electric current of control dormitory power supply.
Two, background technology
The flow control device of crossing that uses at present mostly is analogue type, and its rated current all is a fixed value, and applicable situation is single, if when the load change, just must change switch; Existing in addition current limiting switch does not show the function of electrical network load current.
Three, technology contents
(1) goal of the invention
The purpose of this utility model provides a kind of intelligence and crosses flow control device, and it can set the size of rated current by light-emitting diode display and key switch, and can show the numerical value of two stream operating currents.
(2) technical scheme
A kind of intelligence of the utility model is crossed flow control device, it comprises single-chip microcomputer, interruption input and timer conter input function with the PIC16C711 single-chip microcomputer are provided with the two-way electric current, the signalization input circuit is the rest-set flip-flop circuit, its output links to each other with the timer conter input interface with the singlechip interruption input, lose for the back set point that prevents to cut off the power supply, single-chip microcomputer also is connected with the serial EEPROM memory and is used to store set point.The two-way electric current becomes voltage signal by potentiometer, diode, resistance, voltage-stabiliser tube and is connected with AN2, the AN3 of single-chip microcomputer, utilizes this two-way analog-to-digital conversion interface that the two-way current signal is converted to data, then compares with set point inner.The interface of single-chip microcomputer links to each other with 7 segment encode lines of display circuit by integrated circuit, and the two-way interface of single-chip microcomputer selects signal to link to each other with 74LS07 with 4 positions of display circuit by integrated circuit 74LS139.Utilize single-chip microcomputer to input signal instantaneous value calculating mean value and send display to show.Utilize interface microcontroller output function demonstration measured value and output alarm, power-off signal.The transistor driving relay of the two-way interface of single-chip microcomputer by being provided with, and by transistor driving warning buzzer.
(3) technique effect
A kind of intelligence of the utility model is crossed flow control device, is best suited for civilian low voltage electric network and crosses current control, and it is provided with the two-way current sense function mainly by Single-chip Controlling, and the two-way electric current is input to two analog quantity inputs of single-chip microcomputer respectively; Electric current transfinites value by rest-set flip-flop with by key assignments, and setting range 1～30A, but on-line continuous adjustment only need two keys can finish the setting of two-way electric current.Circuit is provided with the LED display circuit, can show two-way setting current value during setting, during work, can show load current value in real time, shows 3 of positions in real time.The two-way interface of single-chip microcomputer is by the transistor driving relay, and by transistor driving warning buzzer, in a single day electric current transfinites in the circuit, reports to the police immediately and disconnects main circuit, and its circuit is simple, and is cheap, easy to use, has practicality widely.
Four, description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Five, embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is described further:
A kind of intelligence of the utility model is crossed flow control device, mainly contains single-chip microcomputer, measurement current input circuit, signalization input circuit, display circuit, warning drive circuit and memory circuitry and forms.Single-chip microcomputer adopts PIC16C711, the R5 resistance of electrify restoration circuit connects the RCLR end of single-chip microcomputer, reset circuit has only the electrification reset function, there is not the hand-reset function, reason is to have enabled house dog (WDT) the watchdog timer auto-reset function of single-chip microcomputer inside, system can produce reset signal by WDT automatically in case " deadlock " occur, so need not the hand-reset function.The clock crystal oscillator circuit connects OSC1, the OSC2 end of PIC16C711.Two-way electric current I 1, I2 join by serial connection potentiometer WD1, WD2 and ground, the centre cap of potentiometer is connected in series the back with diode D5, D7, resistance R 10, R11 in parallel with voltage-stabiliser tube D6, D8, change into voltage signal and be connected with AN2, the AN3 of single-chip microcomputer respectively through resistance R 10, R11, voltage-stabiliser tube D6, D8 guarantee that the peak value of input signal is no more than the passage maximum permissible value.4 road interfaces RB4 of single-chip microcomputer～RB7 end is connected with A, B, C, the D end of integrated circuit 4511, and the control of LED common cathode is realized by 74LS139 and 74LS07, the A of 74LS139, B termination single-chip microcomputer RB2, RB3 end.Show when display circuit is provided with current limit is set, during operate as normal, show the current value on the two-route wire.Two-way interface RB0, the RB1 of single-chip microcomputer drives the actuating of relay by transistor T 1, T2, and drives the warning buzzer by transistor T 3, and the two-way function is identical.With RB0 one tunnel is example explanation, is transfiniting when needing open circuit, and high level signal appears in RB0, makes the T1 conducting, and relay has electric current to pass through, and makes K3 disconnect (K3, K4 will select the closed type relay for use), and high level makes the T3 conducting simultaneously, and buzzer BELL reports to the police.Because buzzer BELL is that two-way is shared, so form OR circuit by light-emitting diode D13, D14, another effect of D13, D14 is indication and difference two-way alarm condition.Two-way signalization input circuit adopts the rest-set flip-flop circuit, by 42 input nand gate circuit 74LS00 and key switch K1, K2 and resistance R 1, R2, R3, R4 form, its output links to each other with interface microcontroller RA0, RB0 respectively, when K1 or K2 press next time, can produce positive pulse at 74LS00 pin 3 ends or 8 ends, the RA4 end of single-chip microcomputer is the Timer pulse input end, be set to count working method, overflow to produce and interrupt writing down key information.The RB0 end of single-chip microcomputer is the external interrupt signal input, utilizes this function, whenever presses primary key, and single-chip microcomputer produces and once interrupts writing down key information.The electric current limit of device is provided with the signalization input circuit of being made up of rest-set flip-flop and finishes, and the resident single-chip microcomputer internal RAM in back is set.Single-chip microcomputer RB0 is a multiplexing line, is used for the signalization input when being provided with, and is the overload alarm output of I1 during warning.Lose for the back set point that prevents to cut off the power supply, device is provided with serial EEPROM and stores set point, and model is 24LC01B, and the SCL of EEPROM memory circuit, SDA meet RA0, the RA1 of single-chip microcomputer respectively.After power down, when restoring electricity, need not reset.During device work, in single-chip microcomputer, transfer the measurement current value of digital signal and the current limit of setting to and compare, will report to the police by drive circuit if transfinite.
Claims (4)
1. an intelligence is crossed flow control device, and it is characterized in that: it comprises single-chip microcomputer, links to each other with interface microcontroller with the output of two-way restriction electric current signalization by rest-set flip-flop; Two-way is measured electric current by serial connection potentiometer, diode, resistance and receive the analog quantity input of single-chip microcomputer after voltage-stabiliser tube is in parallel; The interface of single-chip microcomputer links to each other with 7 segment encode lines of display circuit by integrated circuit, and the two-way interface of single-chip microcomputer selects signal to link to each other with 7407 with 4 positions of 4 LED display circuits by integrated circuit 74139; The two-way interface of single-chip microcomputer is provided with transistor driving relay and transistor driving warning buzzer, and single-chip microcomputer also is connected with eeprom chip.
2. a kind of intelligence according to claim 1 is crossed flow control device, and it is characterized in that: described single-chip microcomputer model is PIC16C711.
3. a kind of intelligence according to claim 1 is crossed flow control device, and it is characterized in that: described transistor driving warning buzzer circuit also includes two light-emitting diodes.
4. a kind of intelligence according to claim 1 is crossed flow control device, it is characterized in that: the setting of described two-way restriction electric current link to each other with interface microcontroller a road with two-way driving warning circuit in an a road shared interface line RB0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069520 CN2770185Y (en) | 2005-03-04 | 2005-03-04 | Intelligent controller for excess current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069520 CN2770185Y (en) | 2005-03-04 | 2005-03-04 | Intelligent controller for excess current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2770185Y true CN2770185Y (en) | 2006-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520069520 Expired - Fee Related CN2770185Y (en) | 2005-03-04 | 2005-03-04 | Intelligent controller for excess current |
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| Country | Link |
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| CN (1) | CN2770185Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879798A (en) * | 2018-07-04 | 2018-11-23 | 广东电网有限责任公司 | A kind of excessively method of flow control and system, equipment, the medium anti-error based on Sudden Changing Rate |
| CN116015255A (en) * | 2022-12-30 | 2023-04-25 | 成都电科星拓科技有限公司 | Clock seamless switching circuit supporting automatic switching loss |
-
2005
- 2005-03-04 CN CN 200520069520 patent/CN2770185Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879798A (en) * | 2018-07-04 | 2018-11-23 | 广东电网有限责任公司 | A kind of excessively method of flow control and system, equipment, the medium anti-error based on Sudden Changing Rate |
| CN108879798B (en) * | 2018-07-04 | 2021-07-02 | 广东电网有限责任公司 | Over-current control method, system, equipment and medium for preventing error based on mutation |
| CN116015255A (en) * | 2022-12-30 | 2023-04-25 | 成都电科星拓科技有限公司 | Clock seamless switching circuit supporting automatic switching loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |