CN208985008U - Detection circuit and detection device - Google Patents
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- CN208985008U CN208985008U CN201822183813.5U CN201822183813U CN208985008U CN 208985008 U CN208985008 U CN 208985008U CN 201822183813 U CN201822183813 U CN 201822183813U CN 208985008 U CN208985008 U CN 208985008U
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Abstract
The disclosure provides a kind of detection circuit and detection device.Detection circuit includes input port, driving circuit and controller, and wherein driving circuit is electrically connected with input port and controller respectively, and input port is configured as access signal；Driving circuit is configured as the access state according to input port, the first detection circuit is driven to export first detection signal, the second detection circuit output the second detection signal is driven, wherein the level of first detection signal and the second detection signal is opposite in the case where input port has signal access；Controller is configured as determining received signal type according to the level of first detection signal and the second detection signal.The disclosure can carry out self-adapting detecting to the type of access signal.
Description
Technical field
This disclosure relates to control field, in particular to a kind of detection circuit and detection device.
Background technique
With the development of energy internet, the mutual joint conference of energy information is even closer.As energy information control basis,
Logic controller also has been widely used.Each end of energy internet and node require the inspection of logic controller
It surveys and controls, the status information of each node of system is detected with realizing.
Utility model content
Inventors noted that the input of digital quantity used at present detection, there are mainly two types of port, one kind is that source type inputs
Detection, generally accessing signal is high level；Another kind is the input detection of leakage type, and generally accessing signal is low level.Due to can not
Determine the input type at scene, it is therefore desirable to by artificially matching, using suitable detection port.
For this purpose, the disclosure provides a kind of scheme that can be compatible with different digital amount access signal type.
According to the one aspect of one or more other embodiments of the present disclosure, a kind of detection circuit is provided, comprising: input terminal
Mouthful, it is configured as access signal；Driving circuit is configured as the access state according to input port, drives the first detection circuit
Export first detection signal, the second detection circuit of driving output the second detection signal, wherein thering is signal to access in input port
In the case of, the level of first detection signal and the second detection signal is opposite；Controller, be configured as according to first detection signal and
The level of second detection signal, determines received signal type.
In some embodiments, if access signal is high level, first detection signal is high level signal, the second detection
Signal is low level signal；If access signal is low level, first detection signal is low level signal, and the second detection signal is
High level signal.
In some embodiments, in the case where input port does not have signal access, first detection signal and the second detection
The level of signal is identical.
In some embodiments, if input port does not have signal access, first detection signal and the second detection signal are
Low level.
In some embodiments, driving circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance and first
Device in one-way on state；The first end of first resistor is electrically connected with input port, and the of the second end of first resistor and second resistance
One end electrical connection, the first end of 3rd resistor are electrically connected with the second end of second resistance, the second end ground connection of 3rd resistor, and second
Driving signal of the voltage signal of resistance second end as the first detection circuit；The first end and the first one-way conduction of 4th resistance
The second end of device is electrically connected, and the second end of the 4th resistance is electrically connected with first voltage source, and the first of the first device in one-way on state
End is electrically connected with the first end of first resistor, and the conducting direction of the first device in one-way on state is from the first end of the 4th resistance to first
The first end of resistance, driving signal of the voltage signal of the 4th resistance first end as the second detection circuit.
In some embodiments, the resistance value of the resistance value summation of first resistor, second resistance and 3rd resistor and the 4th resistance
The ratio between be greater than predetermined threshold.
In some embodiments, the first detection circuit includes first switch and the 5th resistance；The first end of first switch with
Driving circuit electrical connection, the second end of first switch are electrically connected with the second voltage source, the third end of first switch and the 5th resistance
First end electrical connection, the 5th resistance second end ground connection, the voltage signal of the 5th resistance first end is as first detection signal；
Wherein, in the case where the first end of first switch is in high level, the second end of first switch and the third end of first switch
Electrical connection.
In some embodiments, first switch is NMOS transistor, and the first end of first switch is grid, first switch
Second end is source electrode, and the third end of first switch is drain electrode.
In some embodiments, the second detection circuit includes second switch and the 6th resistance；The first end of second switch with
Driving circuit electrical connection, the second end of second switch are electrically connected with tertiary voltage source, the third end of second switch and the 6th resistance
First end electrical connection, the second end ground connection of the 6th resistance, the voltage signal of the 6th resistance first end is as the second detection signal；
Wherein, the first end of second switch is in low level situation, the second end of second switch and the third end electricity of second switch
Connection.
In some embodiments, second switch is PMOS transistor, and the first end of second switch is grid, second switch
Second end is source electrode, and the third end of second switch is drain electrode.
In some embodiments, detection circuit further include: protection circuit is configured as the accessed signal of input port
Voltage clamp is in predetermined voltage range.
In some embodiments, protection circuit includes the second device in one-way on state and third device in one-way on state；Second is single
It is electrically connected to the first end of conducting device with the 4th voltage source, second end and the input port of the second device in one-way on state are electrically connected
It connects, the conducting direction of the second device in one-way on state is from the second end of the second device in one-way on state to the of the second device in one-way on state
One end；The first end of third device in one-way on state is electrically connected with input port, the second end ground connection of third device in one-way on state, the
The conducting direction of three device in one-way on state is from the second end of third device in one-way on state to the first end of third device in one-way on state.
According to the other side of one or more other embodiments of the present disclosure, a kind of detection device is provided, including such as above-mentioned
The detection circuit that any embodiment is related to.
By the detailed description referring to the drawings to the exemplary embodiment of the disclosure, the other feature of the disclosure and its
Advantage will become apparent.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present disclosure or technical solution in the prior art, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Disclosed some embodiments without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the exemplary block diagram of the detection circuit of an embodiment of the present disclosure；
Fig. 2 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure；
Fig. 3 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure；
Fig. 4 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure；
Fig. 5 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete
Site preparation description, it is clear that described embodiment is only disclosure a part of the embodiment, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the disclosure and its application or making
Any restrictions.Based on the embodiment in the disclosure, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, belong to the disclosure protection range.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the present disclosure processed of formula and numerical value.
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.
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.
Fig. 1 is the exemplary block diagram of the detection circuit of an embodiment of the present disclosure.As shown in Figure 1, the detection circuit includes
Input port 1, driving circuit 2, the first detection circuit 3, the second detection circuit 4 and controller 5.
Input port 1 is configured as access signal.
Driving circuit 2 is configured as the access state according to input port 1, the first inspection of output of the first detection circuit 3 of driving
Survey signal, the second detection circuit 4 of driving output the second detection signal.
Controller 5 is configured as determining received signal according to the level of first detection signal and the second detection signal
Type.
It should be noted that in the case where input port 1 has signal access, first detection signal and the second detection signal
Level it is opposite.
For example, if the signal that input port 1 accesses is that source type accesses signal, i.e., access signal is high level, then first
Detection signal is high level signal, and the second detection signal is low level signal.If the signal that input port 1 accesses is the access of leakage type
Signal, that is, accessed signal are low level, then first detection signal is low level signal, and the second detection signal is high level letter
Number.
Controller 5 can be high level signal, the feelings that the second detection signal is low level signal in first detection signal as a result,
Under condition, determine that input port 1 receives is source type access signal；It is low level signal, the second detection in first detection signal
In the case that signal is high level signal, determine that input port 1 receives is leakage type access signal.
In some embodiments, in the case where input port 1 is accessed without signal, first detection signal and the second detection
The level of signal is identical.
For example, first detection signal and the second detection signal are low level if input port does not have signal access.?
That is determining input port 1 without connecing in the case where first detection signal and the second detection signal are low level signal
Enter, i.e., input port 1 is in sky and connects state.
In disclosure detection circuit provided by the above embodiment, driven respectively by the access state using input port
Dynamic first detection circuit and the second detection circuit, according to the first detection signal of the first detection circuit output and the second detection
Second detection signal of circuit output, it will be able to judge received signal type.The disclosure can be to the class of access signal
Type carries out self-adapting detecting.
Fig. 2 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure.Fig. 2 the difference from Fig. 1 is that,
In the embodiment depicted in figure 2, driving circuit 2 include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 and
First device in one-way on state D1.
The first end of first resistor R1 is electrically connected with input port 1, and the second end of first resistor R1 is with second resistance R2's
First end electrical connection.The first end of 3rd resistor R3 is electrically connected with the second end of second resistance R2, the second end of 3rd resistor R3
Ground connection.Driving signal of the voltage signal of second resistance R2 second end as the first detection circuit 3.
The first end of 4th resistance R4 is electrically connected with the second end of the first device in one-way on state D1, and the second of the 4th resistance R4
End is electrically connected with first voltage source V1.The first end of first device in one-way on state D1 is electrically connected with the first end of first resistor R1,
The conducting direction of first device in one-way on state D1 is from the first end of the 4th resistance R4 to the first end of first resistor R1.4th resistance
Driving signal of the voltage signal of R4 first end as the second detection circuit 4.
In some embodiments, the first device in one-way on state D1 is diode.
For example, that is, access signal is high level if the signal that receives of input port 1 is that source type accesses signal, then the
Voltage at the second end of two resistance R2 is Vin × R3/ (R1+R2+R3), and Vin is the level for accessing signal.That is, providing at this time
Driving signal to the first detection circuit 3 is high level.Simultaneously as the barrier of the first device in one-way on state D1, the 4th resistance
Level at the first end of R4 is high level.That is, the driving signal for being supplied to the second detection circuit 4 at this time is high level.
In another example that is, accessed signal is low level, then if the signal that input port 1 receives is that leakage type accesses signal
Level at the second end of second resistance R2 is also low level.That is, the driving signal for being supplied to the first detection circuit 3 at this time is low
Level.Meanwhile the first device in one-way on state D1 conducting, the level at the first end of the 4th resistance R4 also become low level.I.e. this
When be supplied to the second detection circuit 4 driving signal be low level.
In some embodiments, the resistance value summation of first resistor R1, second resistance R2 and 3rd resistor R3 and the 4th resistance
The ratio between resistance value of R4 is greater than predetermined threshold.For example, the resistance value summation of first resistor R1, second resistance R2 and 3rd resistor R3 are long-range
In the resistance value of the 4th resistance R4.
If input port 1 is accessed without signal, i.e., input port 1 is in sky and connects state, then the of second resistance R2 at this time
It is grounded at two ends, i.e., the driving signal for being supplied to the first detection circuit 3 at this time is low level.In addition, for the 4th resistance R4,
For one device in one-way on state D1, first resistor R1, second resistance R2 and branch where 3rd resistor R3, due to first resistor
The resistance value summation of R1, second resistance R2 and 3rd resistor R3 are much larger than the resistance value of the 4th resistance R4, therefore the of the 4th resistance R4
Level at one end approaches first voltage source V1, i.e., the driving signal for being supplied to the second detection circuit 4 at this time is high level.
That is, driving circuit 2 can access situation according to the signal of input port, respectively to the first detection circuit and the
Two detection circuits provide corresponding driving signal.
Fig. 3 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure.Fig. 3 the difference from Fig. 2 is that,
In the embodiment shown in fig. 3, the first detection circuit 3 includes first switch 31 and the 5th resistance R5.
The first end of first switch 31 is electrically connected with driving circuit 2, to receive the driving signal of the offer of driving circuit 2.
The second end of first switch 31 is electrically connected with the second voltage source V2, the third end of first switch 31 and the first end of the 5th resistance R5
Electrical connection, the second end ground connection of the 5th resistance R5.The voltage signal of 5th resistance R5 first end is as first detection signal.
In some embodiments, first switch 31 is NMOS (N-Metal Oxide Semiconductor, N-type metal oxygen
Compound semiconductor) transistor, the first end of first switch is grid, and the second end of first switch is source electrode, the of first switch
Three ends are drain electrode.
For example, first switch 31 is in the conductive state, i.e., in the case where the first end of first switch 31 is in high level
The second end of first switch 31 is electrically connected with the third end of first switch 31.In this case, the first end of the 5th resistance R5
For high level, i.e. first detection signal is high level.
In another example first switch 31 is in off state in the case where the first end of first switch 31 is in low level situation,
That is the second end of first switch 31 and the third end of first switch 31 disconnects.In this case, the of the 5th resistance R5
One end is low level, i.e., first detection signal is low level.
In some embodiments, as shown in figure 3, the second detection circuit 4 includes second switch 41 and the 6th resistance R6.
The first end of second switch 41 is electrically connected with driving circuit 2, to receive the driving signal of the offer of driving circuit 2.
The second end of second switch 41 is electrically connected with tertiary voltage source V3, the third end of second switch 41 and the first end of the 6th resistance R6
Electrical connection, the second end ground connection of the 6th resistance R6.The voltage signal of 6th resistance R6 first end is as the second detection signal.
In some embodiments, second switch 41 is PMOS (P-channel Metal Oxide Semiconductor, P
NMOS N-channel MOS N) transistor, the first end of second switch 41 is grid, and the second end of second switch 41 is source
Pole, the third end of second switch 41 are drain electrode.
For example, second switch 41 is in the conductive state, i.e., in the case where the first end of second switch 41 is in low level situation
The second end of second switch 41 is electrically connected with the third end of second switch 41.In this case, the first end of the 6th resistance R6
For high level, i.e., the second detection signal is high level.
In another example second switch 41 is in off state in the case where the first end of second switch 41 is in high level,
That is the second end of second switch 41 and the third end of second switch 41 disconnects.In this case, the of the 6th resistance R6
One end is low level, i.e., the second detection signal is low level.
As shown in figure 3, setting the driving end of first switch 31 as A point, the driving end of second switch 41 is B point, first switch
31 output end is C point, and the output end of second switch 41 is D point.When accessing signal is high level, the voltage of A point be Vin ×
R3/ (R1+R2+R3), Vin are the level for accessing signal.A point voltage can drive first switch to be connected at this time, so as to cause C point
For high level, i.e. first detection signal is high level.Meanwhile B point is also high level, causes second switch to end, so as to cause D
Point is low level, i.e., the second detection signal is low level.Each dotted state is as shown in table 1.
Table 1
When accessing signal is low level, A point is low level, and first switch is caused to be ended, and is low electricity so as to cause C point
Flat, i.e., first detection signal is low level.Meanwhile B point also becomes low level, and second switch is caused to be connected, and is so as to cause D point
High level, i.e., the second detection signal is high level.Each dotted state is as shown in table 2.
Table 2
When without access signal, A point is low level, and first switch is caused to be ended, and is low level, i.e., the so as to cause C point
One detection signal is low level.Simultaneously as the resistance value summation of first resistor R1, second resistance R2 and 3rd resistor R3 are much larger than
The resistance value of 4th resistance R4, therefore D level point approaches first voltage source V1, i.e. D point high level at this time, causes second switch to cut
It only, is low level so as to cause D point, i.e., the second detection signal is low level.Each dotted state is as shown in table 3.
Table 3
Controller can be judged to access according to the level height of first detection signal and the second detection signal as a result,
The state and type of signal.
Fig. 4 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure.Fig. 4 the difference from Fig. 1 is that,
It in the embodiment shown in fig. 4, further include protection circuit 6 in detection circuit.
Protection circuit 6 is configured as clamping down on the level of the accessed signal of input port 1 in predetermined voltage range.Thus
It can avoid too high voltages and damage detection circuit.
Fig. 5 is the exemplary block diagram of the detection circuit of another embodiment of the disclosure.Fig. 5 the difference from Fig. 3 is that,
In the embodiment shown in fig. 5, protection circuit includes the second device in one-way on state D2 and third device in one-way on state D3.
The first end of second device in one-way on state D2 is electrically connected with the 4th voltage source, and the second of the second device in one-way on state D2
End is electrically connected with input port 1.The conducting direction of second device in one-way on state D2 from the second end of the second device in one-way on state to
The first end of second device in one-way on state.
The first end of third device in one-way on state D3 is electrically connected with input port, the second end of third device in one-way on state D3
Ground connection, the conducting direction of third device in one-way on state D3 is from the second end of third device in one-way on state to third device in one-way on state
First end.
As shown in figure 5, when the voltage for accessing signal is more than circuit maximum input voltage value V4, the second device in one-way on state
D2 conducting damages detection circuit to be V4 by the voltage clamp for accessing signal to avoid too high voltages.
In some embodiments, the second device in one-way on state D2 and third device in one-way on state D3 is diode.
The disclosure also provides a kind of detection device.The detection device includes the inspection that any embodiment is related into Fig. 5 such as Fig. 1
Slowdown monitoring circuit.
The description of the disclosure is given for the purpose of illustration and description, and is not exhaustively or by the disclosure
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
Embodiment is stated and be the principle and practical application in order to more preferably illustrate the disclosure, and those skilled in the art is enable to manage
The solution disclosure is to design various embodiments suitable for specific applications with various modifications.
Claims (13)
1. a kind of detection circuit, which is characterized in that including input port, driving circuit and controller, wherein driving circuit is distinguished
It is electrically connected with input port and controller, wherein
Input port is configured as access signal；
Driving circuit is configured as the access state according to input port, and the first detection circuit of driving exports first detection signal,
The second detection circuit output the second detection signal is driven, wherein in the case where input port has signal access, the first detection letter
Number and second detection signal level it is opposite；
Controller is configured as determining received signal type according to the level of first detection signal and the second detection signal.
2. detection circuit according to claim 1, which is characterized in that
If access signal is high level, first detection signal is high level signal, and the second detection signal is low level signal；
If access signal is low level, first detection signal is low level signal, and the second detection signal is high level signal.
3. detection circuit according to claim 1, which is characterized in that
In the case where input port does not have signal access, first detection signal is identical with the level of the second detection signal.
4. detection circuit according to claim 3, which is characterized in that
If input port does not have signal access, first detection signal and the second detection signal are low level.
5. detection circuit according to claim 3, which is characterized in that driving circuit includes first resistor, second resistance,
Three resistance, the 4th resistance and the first device in one-way on state；
The first end of first resistor is electrically connected with input port, and the second end of first resistor and the first end of second resistance are electrically connected
It connects, the first end of 3rd resistor is electrically connected with the second end of second resistance, the second end ground connection of 3rd resistor, second resistance second
Driving signal of the voltage signal at end as the first detection circuit；
The first end of 4th resistance is electrically connected with the second end of the first device in one-way on state, the second end of the 4th resistance and the first electricity
Potential source electrical connection, the first end of the first device in one-way on state are electrically connected with the first end of first resistor, the first device in one-way on state
Conducting direction from the first end of the 4th resistance to the first end of first resistor, the voltage signal of the 4th resistance first end is as
The driving signal of two detection circuits.
6. detection circuit according to claim 5, which is characterized in that
The ratio between resistance value summation and the resistance value of the 4th resistance of first resistor, second resistance and 3rd resistor are greater than predetermined threshold.
7. detection circuit according to claim 5, which is characterized in that the first detection circuit includes first switch and the 5th electricity
Resistance；
The first end of first switch is electrically connected with driving circuit, and the second end of first switch is electrically connected with the second voltage source, and first
The third end of switch is electrically connected with the first end of the 5th resistance, the second end ground connection of the 5th resistance, the electricity of the 5th resistance first end
Press signal as first detection signal；
Wherein, in the case where the first end of first switch is in high level, the of the second end of first switch and first switch
The electrical connection of three ends.
8. detection circuit according to claim 7, which is characterized in that
First switch is NMOS transistor, and the first end of first switch is grid, and the second end of first switch is source electrode, and first opens
The third end of pass is drain electrode.
9. detection circuit according to claim 7, which is characterized in that the second detection circuit includes second switch and the 6th electricity
Resistance；
The first end of second switch is electrically connected with driving circuit, and the second end of second switch is electrically connected with tertiary voltage source, and second
The third end of switch is electrically connected with the first end of the 6th resistance, the second end ground connection of the 6th resistance, the electricity of the 6th resistance first end
Press signal as the second detection signal；
Wherein, the first end of second switch is in low level situation, the second end of second switch and the third of second switch
End electrical connection.
10. detection circuit according to claim 9, which is characterized in that
Second switch is PMOS transistor, and the first end of second switch is grid, and the second end of second switch is source electrode, and second opens
The third end of pass is drain electrode.
11. detection circuit according to claim 1 to 10, which is characterized in that further include:
Circuit is protected, is electrically connected with input port, is configured as clamping down on the level of the accessed signal of input port in predetermined electricity
It presses in range.
12. detection circuit according to claim 11, which is characterized in that protection circuit include the second device in one-way on state and
Third device in one-way on state；
The first end of second device in one-way on state is electrically connected with the 4th voltage source, the second end and input of the second device in one-way on state
Port electrical connection, the conducting direction of the second device in one-way on state is from the second end of the second device in one-way on state to the second one-way conduction
The first end of device；
The first end of third device in one-way on state is electrically connected with input port, the second end ground connection of third device in one-way on state, the
The conducting direction of three device in one-way on state is from the second end of third device in one-way on state to the first end of third device in one-way on state.
13. a kind of detection device, which is characterized in that including detection circuit such as of any of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183813.5U CN208985008U (en) | 2018-12-25 | 2018-12-25 | Detection circuit and detection device |
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| CN201822183813.5U CN208985008U (en) | 2018-12-25 | 2018-12-25 | Detection circuit and detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445424A (en) * | 2018-12-25 | 2019-03-08 | 珠海格力电器股份有限公司 | Detection circuit and detection device |
| CN112596462A (en) * | 2020-12-22 | 2021-04-02 | 深圳市英威腾电气股份有限公司 | Output method, device and system based on signal type |
-
2018
- 2018-12-25 CN CN201822183813.5U patent/CN208985008U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445424A (en) * | 2018-12-25 | 2019-03-08 | 珠海格力电器股份有限公司 | Detection circuit and detection device |
| CN109445424B (en) * | 2018-12-25 | 2024-06-11 | 珠海格力电器股份有限公司 | Detection circuit and detection device |
| CN112596462A (en) * | 2020-12-22 | 2021-04-02 | 深圳市英威腾电气股份有限公司 | Output method, device and system based on signal type |
| CN112596462B (en) * | 2020-12-22 | 2022-04-22 | 深圳市英威腾电气股份有限公司 | Output method, device and system based on signal type |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190614 Effective date of abandoning: 20240611 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190614 Effective date of abandoning: 20240611 |