CN209169928U - Protect circuit, circuit system and automation equipment - Google Patents
Protect circuit, circuit system and automation equipment Download PDFInfo
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- CN209169928U CN209169928U CN201822031349.8U CN201822031349U CN209169928U CN 209169928 U CN209169928 U CN 209169928U CN 201822031349 U CN201822031349 U CN 201822031349U CN 209169928 U CN209169928 U CN 209169928U
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- circuit
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- power supply
- protection circuit
- control module
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Abstract
The utility model provides a kind of protection circuit, circuit system and automation equipment, is related to circuit field.The protection circuit includes protection circuit control module, and the switching circuit connecting with protection circuit control module；Wherein, protection circuit control module is when detecting power supply signal exception, the shutdown of control switch circuit, when detecting that power supply signal is normal, the conducting of control switch circuit；Switching circuit power on signal in conducting, and power supply signal is input to functional circuit.The utility model is capable of the safe operation of assurance function circuit.
Description
Technical field
The utility model relates to circuit field more particularly to a kind of protection circuits, circuit system and automation equipment.
Background technique
With industrialization development, automation equipment is increasing, and application scenarios are also more and more, and bad environments degree also exists
Increase, under conventional household, commercial environment, circuit design does not need to do special protection.But industrial environment or other
In the presence of application places such as serious radiation, high surge voltage, high impulse impacts, need to carry out special protection to circuit board.This is improved
The design difficulty of PCB (Printed Circuit Board, printed circuit board), in current circuit design, it is generally the case that
Protection circuit and functional circuit are placed on a PCB, once protection circuit damage, functional circuit may also damage, entirely
Circuit system can not work normally.
Summary of the invention
A technical problem to be solved in the utility model is to provide a kind of protection circuit, circuit system and automation and sets
It is standby, it is capable of the safe operation of assurance function circuit.
On the one hand according to the utility model, propose a kind of protection circuit, including protection circuit control module, and with protection
The switching circuit of circuit control module connection；Wherein, protection circuit control module when detecting power supply signal exception, open by control
Powered-down road shutdown, when detecting that power supply signal is normal, the conducting of control switch circuit；Switching circuit powers on letter in conducting
Number, and power supply signal is input to functional circuit.
Optionally, the protection circuit further include: filter is connect with switching circuit and protection circuit control module respectively,
Switching circuit and protection electricity are separately input into for being filtered to power supply signal, and by the power supply signal after filtering processing
Road control module；Wherein, whether protection circuit control module is abnormal for detection filter treated power supply signal.
Optionally, if protection circuit control module, which detects, is not present surging signal and/or pulse signal in power supply signal,
Then determine that power supply signal is normal, if detecting in power supply signal there are surging signal and/or pulse signal, and surging signal
And/or pulse signal is more than tolerance grade, it is determined that power supply signal is abnormal.
Optionally, protection circuit control module includes: abnormal detection circuit, is believed for detecting voltage disturbance in power supply signal
Number voltage class；Governor circuit is connect with abnormal detection circuit, for judging electricity according to the voltage class of voltage disturbance signal
Whether surging signal and/or pulse signal in source signal are more than tolerance grade, if surging signal and/or pulse signal are more than resistance to
By grade, then control switch circuit turns off, otherwise, the conducting of control switch circuit.
Optionally, protection circuit control module includes: power supply circuit, is connected respectively with abnormal detection circuit and governor circuit
It connects, for powering to abnormal detection circuit and governor circuit.
Optionally, power supply circuit is accumulator or external electrical apparatus.
Optionally, accumulator is connect with functional circuit, the electric energy for receive capabilities circuit output.
A kind of another aspect according to the present utility model, it is also proposed that circuit system, comprising: functional circuit；And it is above-mentioned
Protect circuit.
Optionally, functional circuit and protection circuit are arranged on different printing board PCBs.
Another aspect according to the present utility model, it is also proposed that a kind of automation equipment, including circuit system.
Compared with prior art, the utility model protects circuit control module when detecting power supply signal exception, control
Switching circuit shutdown, so that power supply signal is no longer input to functional circuit, when power supply signal is normal, control switch circuit
Conducting, so that power supply signal is input to functional circuit, is capable of the safe operation of assurance function circuit.
By the detailed description referring to the drawings to the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Detailed description of the invention
The attached drawing for constituting part of specification describes the embodiments of the present invention, and uses together with the description
In explanation the principles of the present invention.
The utility model can be more clearly understood according to following detailed description referring to attached drawing, in which:
Fig. 1 is the structural schematic diagram of one embodiment that the utility model protects circuit.
Fig. 2 is the structural schematic diagram for another embodiment that the utility model protects circuit.
Fig. 3 is the structural schematic diagram for the further embodiment that the utility model protects circuit.
Fig. 4 is the structural schematic diagram of one embodiment of the utility model circuit system.
Fig. 5 is the structural schematic diagram of another embodiment of the utility model circuit system.
Specific embodiment
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should also be noted that unless another
It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality
Proportionate relationship draw.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical
Novel and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described.
Fig. 1 is the structural schematic diagram of one embodiment that the utility model protects circuit.The protection circuit includes protection electricity
Road control module 110 and switching circuit 120.Wherein, circuit control module 110 and switching circuit 120 is protected to connect, switching circuit
120 one end linkage function circuits, the other end connect power supply.
Whether protection circuit control module 110 is abnormal for detecting power supply signal, if power supply signal is abnormal, control switch
Circuit 120 turns off, and otherwise, control switch circuit 120 is connected.Protecting circuit control module 110 is, for example, controller, can be passed through
Software, circuit and combination and other hardware devices are realized.Those skilled in the art is it is found that controller can be PLC, integrate
The specific hardware device of the compositions such as circuit, associated components.
Wherein, protection circuit control module 110 is connect with external power supply, may be carried secretly in external power supply signal many miscellaneous
Scattered high voltage, high pulse voltage impact signal, produce a very large impact functional circuit.Therefore, it is necessary to detect power supply signal to be
No there are high surging signal or high pulse signals, that is, judge whether power supply signal is abnormal.In power supply signal exception, will open in time
Powered-down road 120 disconnects, so that power supply signal is no longer input to functional circuit, prevents damage functional circuit.
Switching circuit 120 is used for the power on signal in conducting, and power supply signal is input to functional circuit.Switch electricity
Road 120 includes switching transistor.
In this embodiment, protection circuit control module is when detecting power supply signal exception, the shutdown of control switch circuit,
So that power supply signal is no longer input to functional circuit, and when power supply signal is normal, the conducting of control switch circuit, so that
Power supply signal is input to functional circuit, is capable of the safe operation of assurance function circuit.
Fig. 2 is the structural schematic diagram for another embodiment that the utility model protects circuit.The protection circuit includes filtering
Device 210, protection circuit control module 220 and switching circuit 230.
Filter 210 respectively with switching circuit 230 and protection circuit control module 220 connect, be used for power supply signal into
Row filtering processing, and the power supply signal after filtering processing is separately input into switching circuit 230 and protection circuit control module
220。
Filter 210 is, for example, EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) filter,
For external spuious high voltage, high pulse voltage impact signal to be filtered out and are intercepted.
Protect circuit control module 220 whether abnormal for detection filter treated power supply signal, if power supply signal is different
Often, then control switch circuit 230 turns off, and otherwise, control switch circuit 230 is connected.
For example, in protection 220 detection filter of circuit control module treated power supply signal, whether there is also surging signals
Or pulse signal, if surging signal or pulse signal are not present in power supply signal, it is determined that power supply signal is normal, otherwise, judgement
Whether surging signal or pulse signal are more than tolerance grade, if surging signal or pulse signal are more than tolerance grade, it is determined that electricity
Source signal is abnormal.
Signal voltage is generally divided into digital quantity signal and analog signals, and digital quantity signal is divided into bus signals and digital quantity
Controller signals, bus signals are generally two kinds of grades of 3.3V or 5V, and discrete control signal is generally source type (+24V) or leakage
Two kinds of type (0V), analog signals voltage is generally 0-10V.Both interference of surging signal and high-speed pulse signal, with equipment
Use environment, the use instrument of collocation are related.For example, surging signal and high-speed pulse signal are possibly from neighbouring environment
Electricity network perhaps other powerful devices in the same network or thunders etc..If surging signal or pulse signal are super
Can then functional circuit be damaged by crossing tolerance grade, therefore, when surging signal or pulse signal are more than tolerance grade, should be hindered
Only power supply signal is input to functional circuit.
Switching circuit 230 is used for the power on signal in conducting, and power supply signal is input to functional circuit, is turning off
When, prevent power supply signal from being input to functional circuit.
In this embodiment, power supply signal first passes through filter, impacts to high voltage, the high pulse voltage in power supply signal
Signal filter out, by filtered power supply signal through overprotection circuit control module, by protection circuit control module
Judge whether to turn off switching circuit, avoids occurring in power supply signal damage function electricity when high surge, high-speed pulse signal voltage
Road.
In one embodiment of the utility model, protection circuit control module is as shown in figure 3, include abnormal detection circuit
310 and governor circuit 320, abnormal detection circuit 310 and governor circuit 320 connect.Wherein, abnormal detection circuit 310 is for examining
Survey the voltage class of voltage disturbance signal in power supply signal.Wherein, abnormal detection circuit 310 can be signal acquisition circuit, main
Input surge and pulse frequency and voltage etc. are acquired, is capable of detecting when the voltage class of voltage disturbance signal in power supply signal.
Governor circuit 320 judges whether surging signal or pulse signal in power supply signal surpass according to the voltage class of voltage disturbance signal
Tolerance grade is crossed, if surging signal or pulse signal are more than tolerance grade, control switch circuit 230 is turned off, and otherwise, control is opened
Powered-down road 230 is connected.Governor circuit 320 is, for example, controller, can pass through software, circuit and combination and other hardware devices
It realizes.Those skilled in the art is it is found that controller can be the specific hardware of the compositions such as PLC, integrated circuit, associated components
Device.
In another embodiment, the protection circuit control module can also include power supply circuit 330, respectively with exception
Detection circuit 310 and governor circuit 320 connect, for powering to abnormal detection circuit and governor circuit.Wherein, power supply circuit
330 can be accumulator or external electrical apparatus etc., and external electrical apparatus is, for example, photovoltaic circuit etc..Wherein, if power supply electricity
Road is accumulator, then accumulator is capable of the electric energy of receive capabilities circuit output.I.e. in the case where the power-off of outside, protection electricity
Road remains to work independently.
Fig. 4 is the structural schematic diagram of one embodiment of the utility model circuit system.The circuit system includes function electricity
Road 410 and protection circuit 420, wherein protect circuit specific structure can with as shown in figure 5, functional circuit 410 for circuit system
Basic load part, and it is possible to protection circuit 420 in accumulator power supply.
Wherein, when external input power voltage signal normally without surge voltage, no pulse voltage when, protect circuit 420 in
Abnormal detection circuit detect that surge, pulse are without exception, then governor circuit control switch circuit be connected, be input from the outside power supply
It powers to functional circuit, functional circuit charges to energy storage device.When high surge electricity occurs suddenly in external input power voltage signal
When pressure, high pulse voltage signal, the abnormal detection circuit in circuit is protected to be able to detect that high surge voltage, high pulse voltage letter
Number, if high surge voltage, high pulse voltage signal are more than that can bear threshold value, function is cut off in the shutdown of governor circuit control switch circuit
The power supply power supply of energy circuit, functional circuit stop charging to energy storage device, and function module circuit is in power-off protection at this time.
In addition, when high surge voltage, high pulse voltage signal occurs suddenly in external input power voltage signal, even if filtering
Device is damaged under surge or high-speed pulse signal, still can be turned off, be made by the governor circuit control switch circuit of protection circuit
Function module circuit is obtained to be in power-off protection.
In one embodiment, functional circuit 410 and protection circuit 420 can be set on different PCB, reduce PCB
It is related to difficulty, reduces maintenance cost, in addition, still can guarantee that functional circuit 410 is normal after protection circuit 420 damages.
In another embodiment of the utility model, a kind of automation equipment is protected, which includes above-mentioned
Circuit system.
So far, the utility model is described in detail.In order to avoid covering the design of the utility model, this is not described
Some details well known to field.Those skilled in the art as described above, completely it can be appreciated how implementing public here
The technical solution opened.
Although being described in detail by some specific embodiments of the example to the utility model, this field
It is to be understood by the skilled artisans that above example merely to be illustrated, rather than in order to limit the scope of the utility model.This
Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case where, to above embodiments
It modifies.The scope of the utility model is defined by the following claims.
Claims (10)
1. a kind of protection circuit, which is characterized in that including protect circuit control module, and with the protection circuit control module
The switching circuit of connection；
Wherein, there are surging signal and/or pulse signals in detecting power supply signal for the protection circuit control module, and
The surging signal and/or pulse signal are more than tolerance grade, it is determined that the power supply signal is abnormal, controls the switching circuit
Shutdown controls the switching circuit conducting when detecting that power supply signal is normal；The switching circuit powers in conducting
Signal, and power supply signal is input to functional circuit.
2. protection circuit according to claim 1, which is characterized in that further include:
Filter is connect, for filtering to power supply signal respectively with the switching circuit and the protection circuit control module
Wave processing, and the power supply signal after filtering processing is separately input into the switching circuit and the protection circuit control module；
Wherein, whether the protection circuit control module is abnormal for detection filter treated power supply signal.
3. protection circuit according to claim 1 or 2, which is characterized in that
If the protection circuit control module detects that there is no surging signal and/or pulse signals in power supply signal, it is determined that
The power supply signal is normal.
4. protection circuit according to claim 3, which is characterized in that the protection circuit control module includes:
Abnormal detection circuit, for detecting the voltage class of voltage disturbance signal in power supply signal；
Governor circuit is connect with the abnormal detection circuit, for judging that power supply is believed according to the voltage class of voltage disturbance signal
Whether surging signal and/or pulse signal in number are more than tolerance grade, if the surging signal and/or pulse signal are more than resistance to
By grade, then the switching circuit shutdown is controlled, otherwise, controls the switching circuit conducting.
5. protection circuit according to claim 4, which is characterized in that the protection circuit control module includes:
Power supply circuit is connect with the abnormal detection circuit and the governor circuit respectively, is used for the abnormal detection circuit
It powers with the governor circuit.
6. protection circuit according to claim 5, which is characterized in that
The power supply circuit is accumulator or external electrical apparatus.
7. protection circuit according to claim 6, which is characterized in that
The accumulator is connect with the functional circuit, for receiving the electric energy of the functional circuit output.
8. a kind of circuit system characterized by comprising
Functional circuit；And
Protection circuit as claimed in claim 1 to 7.
9. circuit system according to claim 8, which is characterized in that
The functional circuit and the protection circuit are arranged on different printing board PCBs.
10. a kind of automation equipment, which is characterized in that including circuit system described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822031349.8U CN209169928U (en) | 2018-12-05 | 2018-12-05 | Protect circuit, circuit system and automation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822031349.8U CN209169928U (en) | 2018-12-05 | 2018-12-05 | Protect circuit, circuit system and automation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209169928U true CN209169928U (en) | 2019-07-26 |
Family
ID=67342103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822031349.8U Active CN209169928U (en) | 2018-12-05 | 2018-12-05 | Protect circuit, circuit system and automation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209169928U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301792A (en) * | 2018-12-05 | 2019-02-01 | 珠海格力电器股份有限公司 | Protect circuit, circuit system, automation equipment, control method and device |
| CN111158152A (en) * | 2020-02-17 | 2020-05-15 | Oppo广东移动通信有限公司 | Head-mounted display device and DLP projection system |
-
2018
- 2018-12-05 CN CN201822031349.8U patent/CN209169928U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301792A (en) * | 2018-12-05 | 2019-02-01 | 珠海格力电器股份有限公司 | Protect circuit, circuit system, automation equipment, control method and device |
| CN111158152A (en) * | 2020-02-17 | 2020-05-15 | Oppo广东移动通信有限公司 | Head-mounted display device and DLP projection system |
| WO2021164453A1 (en) * | 2020-02-17 | 2021-08-26 | Oppo广东移动通信有限公司 | Head-mounted display device and dlp projection system |
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