CN204498101U - The alternating current-direct current self adaptation of microcomputer protecting device opens entry loop - Google Patents
The alternating current-direct current self adaptation of microcomputer protecting device opens entry loop Download PDFInfo
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- CN204498101U CN204498101U CN201520232603.4U CN201520232603U CN204498101U CN 204498101 U CN204498101 U CN 204498101U CN 201520232603 U CN201520232603 U CN 201520232603U CN 204498101 U CN204498101 U CN 204498101U
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- optical coupling
- protecting device
- logical block
- microcomputer protecting
- direct current
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Abstract
The alternating current-direct current self adaptation that the utility model discloses a kind of microcomputer protecting device opens entry loop; comprise optical coupling module and the rectifier bridge coupling input power; described optical coupling module input couples rectifier bridge and exports; also comprise logical block; the quantity of described optical coupling module is at least two; the output of some described optical coupling modules is all coupled to logical block, and described logical block is only when some described optical coupling modules all export normal signal, and output services signal is to chip I/O mouth.The alternating current-direct current self adaptation of microcomputer protecting device of the present utility model opens entry loop; by the setting of multiple optical coupling module; multiple optical coupling module all gathers out entry loop signal; and only multiple optical coupling module export all normal clear under just can output services signal; thus, considerably increase the operation precision of microcomputer protecting device.
Description
Technical field
The utility model relates to a kind of microcomputer protecting device, and the alternating current-direct current self adaptation relating to a kind of microcomputer protecting device in particular opens entry loop.
Background technology
The remote signalling of microcomputer protecting device open into basic adopt be direct current open into, for the application place not having DC power supply, external rectifying device or increasing can only join direct current cabinet, with ensure remote signalling open into can correctly adopt into.So not only add equipment cost, and increase equipment temporarily, bring difficulty to construction, installation, debugging.
Chinese Patent Application No. is that CN200920137741.9 discloses one " alterating and direct current volt-ammeter and sample circuit based on single-chip microcomputer and optocoupler ", by arranging a rectifier bridge between light coupling relay and input power, like this when alternating current be input to this open entry loop time, the effect of a rectification first can be carried out through rectifier bridge, becoming direct current is after rectification input in light coupling relay, light coupling relay will export corresponding signal on the I/O mouth of chip, reach like this one be no matter AC power or DC power supply can carry out opening into adopt into.
But above opens entry loop, and light coupling relay is directly electrically connected with the I/O mouth of chip, and because the operation voltage of light coupling relay is low, operating power is little, and the problem of easy microcomputer protecting device misoperation, reduces the operation precision of microcomputer protecting device.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of alternating current-direct current self adaptation increasing microcomputer protecting device operation precision to open entry loop.
For achieving the above object; the utility model provides following technical scheme: a kind of alternating current-direct current self adaptation of microcomputer protecting device opens entry loop; comprise optical coupling module and the rectifier bridge coupling input power; described optical coupling module input couples rectifier bridge and exports; it is characterized in that: also comprise logical block; the quantity of described optical coupling module is at least two; the output of some described optical coupling modules is all coupled to logical block; described logical block is only when some described optical coupling modules all export normal signal, and output services signal is to chip I/O mouth.
By adopting technique scheme; due to the setting of multiple optical coupling module; so export multiple signal in the process of work; logical block also can receive multiple signal; multiple signal all gathers samely opens entry loop signal; and only have when multiple signal is identical; logical block just can export a working signal and drive Microcomputer Protection to chip I/O mouth; the protecting circuit so just can effectively avoiding the reason due to optocoupler misoperation to cause produces misoperation, substantially increases the operation precision of microcomputer protecting device.
The utility model is set to further: described optical coupling module comprises light coupling relay and amplifying circuit, the input of described light coupling relay two ends couples rectifier bridge and exports, light coupling relay one end exports ground connection, the other end exports the normal phase input end coupling operating voltage and amplifying circuit, the negative-phase input ground connection of described amplifying circuit; Amplification circuit output end all couples the input of described logical block, and described logical block exports coupling chip I/O mouth.
By adopting technique scheme, the output signal of each light coupling relay is all amplified by amplifying circuit signal like this; The input of the signal input logic unit after amplification; judge through logical block; only have when multiple signal is equal time; export high level signal; and control microcomputer protecting device action by this high level signal, so just effectively can prevent the problem causing microcomputer protecting device misoperation because of a light coupling relay misoperation.
The utility model is set to further: described logical block adopts AND circuit.
By adopting technique scheme; AND circuit only just can export high level or low level when multiple optical coupling module outputs signal identical; but low level signal is not enough to drive microcomputer protecting device action; therefore; only when all optical coupling modules all export normal signal, the working signal of output just can drive microcomputer protecting device action.
The utility model is set to further: described rectifier bridge has also been arranged in parallel filter capacitor,
By adopting technique scheme, arrange by filter capacitor the effect output current of rectifier bridge can being carried out a filtering, the interference harmonic wave of elimination above it, reduces the number of times that light coupling relay produces misoperation further.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that the alternating current-direct current self adaptation of microcomputer protecting device of the present utility model opens entry loop.
Accompanying drawing marks: 1, optical coupling module; 2, amplifying circuit; DZ, rectifier bridge; ; K, light coupling relay; R1 ~ R10, resistance; C1, electric capacity.
Embodiment
Open entry loop embodiment with reference to the alternating current-direct current self adaptation of Fig. 1 to the utility model microcomputer protecting device to be described further.
As shown in Figure 1, the alternating current-direct current self adaptation of a kind of microcomputer protecting device of the present embodiment opens entry loop, comprises and adopts the input power of electrical connection, rectifier bridge DZ, optical coupling module 1(to comprise light coupling relay K and amplifying circuit 2 successively), AND circuit.
Input power exports rectifier bridge DZ to and powers to rectifier bridge DZ.Rectifier bridge DZ is coupled with light coupling relay K.The quantity of light coupling relay K is two (higher to precision, can arrange two or more, but consider cost reason, the utility model adopts two), and two light coupling relay K connections parallel with one another, each light coupling relay K exports and is provided with amplifying circuit 2.This amplifying circuit adopts in-phase amplification circuit, and its normal phase input end is all connected to light coupling relay K and exports, its negative-phase input ground connection.The output of above-mentioned two amplifying circuits is all connected to two inputs of AND circuit, and the output of AND circuit is electrically connected with chip I/O.
Preferably, amplifying circuit 2 is the first amplifying circuit and the second amplifying circuit, and these two amplifying circuits are in-phase amplification circuit.First amplifying circuit is made up of R5, R7, R8 and operational amplifier, and the second amplifying circuit is made up of R6, R9, R10 and operational amplifier, and wherein, R8 and R10 is respectively the feedback resistance of the first and second amplifying circuits.This operational amplifier can adopt LM371 chip.
Preferably, light coupling relay K input is provided with protective resistance R1 and R2.R3 and R4 couples light coupling relay K and exports between operating voltage, and it act as pull-up resistor, improves light coupling relay K and exports.
Preferably, rectifier bridge DZ has also been arranged in parallel filter capacitor C1, and described filter capacitor C1 and light coupling relay K is connected in parallel.Arrange by filter capacitor C1 the effect output current of rectifier bridge can being carried out a filtering, the interference harmonic wave of elimination above it, reduces the number of times that light coupling relay produces misoperation further.
The utility model has the following advantages: arrange multiple optical coupling module and logical block, and multiple optical coupling module exports and is all connected to logical block input.Judge each optical coupling module operating state by logical block, when the signal that these light coupling relay export is equal, AND circuit can export high level and low level signal, but low level signal is not enough to drive microcomputer protecting device.Therefore, only when light coupling relay output is equal and logical block exports high level signal, just microcomputer protecting device action can be driven.The protecting circuit so just can effectively avoiding the reason due to optocoupler misoperation to cause produces misoperation, substantially increases the operation precision of microcomputer protecting device.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. the alternating current-direct current self adaptation of a microcomputer protecting device opens entry loop; comprise optical coupling module and the rectifier bridge coupling input power; described optical coupling module input couples rectifier bridge and exports; it is characterized in that: also comprise logical block; the quantity of described optical coupling module is at least two; the output of some described optical coupling modules is all coupled to logical block, and described logical block is only when some described optical coupling modules all export normal signal, and output services signal is to chip I/O mouth.
2. the alternating current-direct current self adaptation of microcomputer protecting device according to claim 1 opens entry loop, it is characterized in that: described optical coupling module comprises light coupling relay and amplifying circuit, the input of described light coupling relay two ends couples rectifier bridge and exports, light coupling relay one end exports ground connection, the other end exports the normal phase input end coupling operating voltage and amplifying circuit, the negative-phase input ground connection of described amplifying circuit; Amplification circuit output end all couples the input of described logical block, and described logical block exports coupling chip I/O mouth.
3. the alternating current-direct current self adaptation of microcomputer protecting device according to claim 1 and 2 opens entry loop, it is characterized in that: described logical block adopts AND circuit.
4. the alternating current-direct current self adaptation of microcomputer protecting device according to claim 2 opens entry loop, it is characterized in that: described rectifier bridge has also been arranged in parallel filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232603.4U CN204498101U (en) | 2015-04-17 | 2015-04-17 | The alternating current-direct current self adaptation of microcomputer protecting device opens entry loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232603.4U CN204498101U (en) | 2015-04-17 | 2015-04-17 | The alternating current-direct current self adaptation of microcomputer protecting device opens entry loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204498101U true CN204498101U (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520232603.4U Expired - Fee Related CN204498101U (en) | 2015-04-17 | 2015-04-17 | The alternating current-direct current self adaptation of microcomputer protecting device opens entry loop |
Country Status (1)
| Country | Link |
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| CN (1) | CN204498101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483813A (en) * | 2022-09-15 | 2022-12-16 | 无锡市欧瑞杰电子科技有限公司 | Alternating current-direct current self-adaptation input sampling circuit and switching power supply |
-
2015
- 2015-04-17 CN CN201520232603.4U patent/CN204498101U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483813A (en) * | 2022-09-15 | 2022-12-16 | 无锡市欧瑞杰电子科技有限公司 | Alternating current-direct current self-adaptation input sampling circuit and switching power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20160417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |