CN106325163A - Switch monitoring circuit and electronic device - Google Patents
Switch monitoring circuit and electronic device Download PDFInfo
- Publication number
- CN106325163A CN106325163A CN201610835546.8A CN201610835546A CN106325163A CN 106325163 A CN106325163 A CN 106325163A CN 201610835546 A CN201610835546 A CN 201610835546A CN 106325163 A CN106325163 A CN 106325163A
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- China
- Prior art keywords
- monitoring
- pin
- switch
- chip
- pins
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24024—Safety, surveillance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a switch monitoring circuit and an electronic device. The switch monitoring circuit comprises a first monitoring chip, first pull-down resistors, first switches, and diodes. The first monitoring chip has at least two monitoring pins. Each monitoring pin is connected with a ground terminal through one first pull-down resistor. One first switch is connected between any monitoring pin and the other monitoring pins and any combination of the other monitoring pins, each switch is connected to the other monitoring pins through one diode, and the anode of each diode is connected with any monitoring pin. The first monitoring chip is set to output a high level through any monitoring pin and monitor the states of all the first switches according to the levels of any monitoring pin and each of the other monitoring pins. Thus, the number of I/O pins of a monitoring chip for switch monitoring is reduced effectively, effective monitoring can be achieved with a low-cost monitoring chip with fewer I/O pins, the utilization rate of the I/O pins of a monitoring chip is improved, and the cost is reduced.
Description
Technical field
The present invention relates to monitoring switch circuit engineering field, more particularly it relates to an monitoring switch circuit and
Electronic equipment.
Background technology
Single chip machine controlling circuit is applied quite in existing electronic product such as coded lock or various sensing remote control equipment
Extensively, the monitoring switch circuit and as man-machine interface is the most varied.A usual switch needs a single-chip processor i/o
Pin is the most corresponding, when switching more, it is necessary to single-chip microcomputer has a more I/O pin, and the I/O pin of usual single-chip microcomputer
Quantity is very limited, it is therefore desirable to increases hardware and carrys out expansion I/O pin, relatively costly.
Summary of the invention
It is an object of the present invention to provide a kind of by single-chip microcomputer less I/O pin monitor more on off states new
Technical scheme.
According to the first aspect of the invention, it is provided that a kind of monitoring switch circuit, including the first monitoring chip, first drop-down
Resistance, the first switch and diode, described first monitoring chip has at least two monitoring pin, and each described monitoring pin is equal
It is connected with earth terminal through the first pull down resistor, arbitrary monitoring pin and other monitoring pins and the combination in any of other monitoring pins
Between be respectively connected with one first switch, described first switch is all connected to described other through a diode and monitors pins, wherein, institute
The anode stating diode is all connected with described arbitrary monitoring pin, and described first monitoring chip is arranged by described arbitrary prison
Control pin output high level the level monitoring according to described arbitrary monitoring pin and each other monitoring pins described own
The state of described first switch.
Optionally, described first monitoring chip is provided by a MCU.
Optionally, described monitoring switch circuit also includes the second monitoring chip and second switch circuit, each described
Two on-off circuits all include second switch and the current-limiting resistance being connected in series, and the resistance of each described current-limiting resistance is different；Institute
Stating the second monitoring chip and have two simulation monitoring pins, a described simulation monitoring pin is through the second pull down resistor and earth terminal
Connecting, each described second switch circuit in parallel is connected between said two simulation monitoring pin, described second monitoring chip
Be arranged by another described simulation monitoring pin output analog voltage and according to said two simulation monitoring pin between
The state of each described second switch of voltage monitoring.
Optionally, described second monitoring chip is provided by a MCU.
Optionally, described first monitoring chip and described second monitoring chip are identity element.
According to the second aspect of the invention, it is provided that a kind of electronic equipment, including described according to a first aspect of the present invention
Monitoring switch circuit.
It was found by the inventors of the present invention that in the prior art, there is monitoring switch circuit needs the I/O number of pins of single-chip microcomputer
Measure and more cause relatively costly problem.Therefore, the present invention is to be realized technical assignment or technical problem to be solved
Be that those skilled in the art never expect or it is not expected that, therefore the present invention is a kind of new technical scheme.
One of the present invention has the beneficial effects that, by monitoring switch circuit of the present invention, it is possible to effectively save monitoring chip
For the usage quantity of the I/O pin of pilot switch, effective monitoring just can be reached with few I/O pin monitoring chip of low cost
Effect, improve the utilization rate of monitoring chip I/O pin, and reduce cost.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, the further feature of the present invention and
Advantage will be made apparent from.
Accompanying drawing explanation
Combined in the description and the accompanying drawing of the part that constitutes description shows embodiments of the invention, and even
With its explanation together for explaining the principle of the present invention.
Fig. 1 is a kind of circuit theory diagrams implementing structure according to the present invention a kind of monitoring switch circuit；
Fig. 2 is the another kind of circuit theory diagrams implementing structure according to the present invention a kind of monitoring switch circuit.
Description of reference numerals:
U1, U2-monitoring chip；GND-earth terminal；
R11, R12, R13, R2-pull down resistor；R21, R22, R23, R24-current-limiting resistance；
A11, A12, A13-monitor pin；A21, A22-simulation monitoring pin；
S111、S112、S113、S121、S122、S123、S131、S132、S133、S21、
S22, S23, S24-switch；
D11、D12、D131、D132、D21、D22、D231、D232、D31、D32、D331、
D332-diode.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should also be noted that unless additionally have
Body illustrates, the parts illustrated the most in these embodiments and positioned opposite, the numerical expression of step and numerical value are not intended to this
The scope of invention.
Description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And any restriction applied or use.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
During in order to solve to switch more present in prior art, single-chip microcomputer is needed to have more I/O pin, and usual
The I/O pin number of single-chip microcomputer is very limited, it is therefore desirable to increases hardware and comes expansion I/O pin, relatively costly problem, it is provided that
A kind of monitoring switch circuit, as it is shown in figure 1, include the first monitoring chip U1, the first pull down resistor R1, the first switch and two poles
Pipe, the first monitoring chip U1 has at least two monitoring pin, and each monitoring pin is all through the first pull down resistor and earth terminal GND
Connecting, arbitrary monitoring pin draws with other monitoring pins and other monitoring alternately as reference monitor pin, reference monitor pin
Being respectively connected with one first switch between the combination in any of foot, the first switch is all connected to other monitoring described through a diode and draws
Foot, wherein, the anode of all diodes is all connected with reference monitor pin, and the first monitoring chip U1 is arranged by with reference to prison
Control pin output high level all first switches of level monitoring according to reference monitor pin and other monitoring pins each
State.
Concrete, have as a example by three monitoring pin A11, A12, A13 by the first monitoring chip below and illustrate: be each
It is connected to first pull down resistor R11, R12, R13 to earth terminal GND on monitoring pin A11, A12, A13, is connected in series
First switch S111 and diode D11 is connected in series between monitoring pin A11 and A12, the first switch S112 being connected in series
With diode D12 is connected in series between monitoring pin A11 and A13, the first switch S113 and diode D131 being connected in series
Being connected in series between monitoring pin A11 and A12, the first switch S113 and diode D132 being connected in series is connected in series in prison
Between control pin A11 and A13, wherein, the anode of diode D11, D12, D131, D132 is all connected with monitoring pin A11；Series connection
The the first switch S121 and diode D21 connected is connected in series between monitoring pin A12 and A11, and first be connected in series opens
Close S122 and diode D22 to be connected in series between monitoring pin A12 and A13, the first switch S123 and two poles being connected in series
Pipe D231 is connected in series between monitoring pin A12 and A11, and the first switch S123 and the diode D232 series connection being connected in series is even
Being connected between monitoring pin A12 and A13, wherein the anode of diode D21, D22, D231, D232 is all with monitoring pin A12 even
Connect；The the first switch S131 and diode D31 being connected in series is connected in series between monitoring pin A13 and A11, is connected in series
First switch S132 and diode D32 is connected in series between monitoring pin A13 and A12, the first switch S133 being connected in series
With diode D331 is connected in series between monitoring pin A13 and A11, the first switch S133 and diode D332 being connected in series
Be connected in series in monitoring pin A13 and A12 between, wherein, the anode of diode D31, D32, D331, D332 all with monitor pin
A13 connects, for example, it is possible to first by monitoring pin A11 as reference monitor pin, the first monitoring chip U1 is by monitoring pin
A11 exports high level, detects the level of remaining monitoring pin A12, A13, if be detected that monitoring pin A12, A13 are low electricity
Flat, then may determine that first switch S111, S112, S113 is off-state, if be detected that monitoring pin A12, A13 are
High level, then may determine that the first switch S113 is conducting state；Again by monitoring pin A12 as reference monitor pin, first
Monitoring chip U1 exports high level by detection pin A12, detects the level of remaining monitoring pin A11, A13, if only detected
It is high level to monitoring pin A11, then may determine that the first switch S121 is conducting state；Pin A13 will be monitored again as ginseng
Examining monitoring pin, the first monitoring chip U1 exports high level by detection pin A13, detects remaining monitoring pin A11, A12
Level, if only detecting monitoring pin A12 is high level, then may determine that the first switch S132 is conducting state.According to
The circulation of upper method detects, and in the case of any one first switch conduction being detected, perform to preset with this switch
Feature operation one to one.
Such as, in the case of monitoring pin A11 is reference monitor pin output high level, if be detected that monitoring pin
The level of A12, A13 is respectively (01), wherein 0 represents low level, 1 represents high level, then shows that the first switch S12 is for conducting shape
State；In the case of monitoring pin A12 is reference monitor pin output high level, if be detected that monitoring pin A11, A13
Level is respectively (11), then show that the first switch S23 is conducting state；It is reference monitor pin output height at monitoring pin A13
In the case of level, if be detected that the level of monitoring pin A11, A12 is respectively (11), then show that the first switch S33 is for leading
Logical state, if adhering to that the level monitoring pin A11, A12 is respectively (00), then shows that first switch S31, S32, S33 is equal
Disconnecting, therefore, the first monitoring chip U1 is that the level monitoring all first according to reference monitor pin and other monitoring pins is opened
The state closed.
So, in the case of only considering that Single switch triggers, by N number of monitoring pin of monitoring chip, it is possible to realize
To N × (2N-1-1) monitoring of individual switch, therefore, it becomes possible to just can reach effective with the monitoring chip of few pin of low cost
The effect of monitoring, improves the utilization rate of monitoring chip pin, saves the cost of supervisory circuit.
Further, above-mentioned first monitoring chip U1 can be provided by a MCU chip that can process digital signal, above-mentioned
Monitoring pin is provided by the I/O pin of this MCU.
In one particular embodiment of the present invention, monitoring switch circuit also includes the second monitoring chip U2 and second switch
Circuit, as in figure 2 it is shown, each second switch circuit all includes second switch and the current-limiting resistance being connected in series, and each current limliting
The resistance of resistance is different；Second monitoring chip U2 has two simulation monitorings pin A21, A22, wherein, simulation monitoring pin energy
Enough processing analogue signal, a simulation monitoring pin A22 is connected with earth terminal GND through the second pull down resistor R2, and all second opens
Closing circuit to be connected in parallel between two simulation monitorings pin A21, A22, the second monitoring chip U2 is arranged by another
Simulation monitoring pin A21 output analog voltage and according to the voltage monitoring between two simulation monitorings pin A21, A22 each
The state of second switch.
It is possible to further pre-set two module monitors pins when each second switch corresponding is conducting state
Between magnitude of voltage between relation and corresponding each magnitude of voltage need the synopsis of relation between the feature operation performed,
Between two simulation monitoring pins of detection while voltage, by searching synopsis to perform the function corresponding with current voltage
Operation.
Such as, second switch S21 and current-limiting resistance R21 is connected in series between simulation monitoring pin A21, A22, and second opens
Close S22 and current-limiting resistance R22 to be connected in series between simulation monitoring pin A21, A22, second switch S23 and current-limiting resistance R23
Being connected in series between simulation monitoring pin A21, A22, second switch S24 and current-limiting resistance R24 is connected in series in simulation monitoring
Between pin A21, A22, as long as ensureing that the resistance of the current-limiting resistance that each second switch is connected in series is different, it is possible to by this
Two simulation monitoring pins realize the monitoring to numerous switch, and so, each switch is the simulation monitoring that closure state is corresponding
Magnitude of voltage between pin A21, A22 is different, it is possible to determines according to the voltage detected between simulation monitoring pin A21, A22 and closes
The switch closed, according to the circuit of the present embodiment, it is also possible to is applicable to the situation that Multi-Switch is closed at, now, only need to ensure to appoint
When the second switch of meaning combination and any second switch Guan Bi, the voltage difference between simulation monitoring pin A21, A22.
Further, above-mentioned second monitoring chip U2 can be provided by a MCU chip that can process analogue signal, above-mentioned
Simulation monitoring pin A21, A22 are provided by the I/O pin of this MCU.
On this basis, above-mentioned first monitoring chip U1 and the second monitoring chip U2 can either be processed simulation by one
Signal, can process again digital signal MCU chip provide.
Present invention also offers a kind of electronic equipment, including above-mentioned monitoring switch circuit.This electronic equipment can be such as
Various sensing remote control equipments etc. in coded lock or Smart Home.
The various embodiments described above primary focus describes the difference with other embodiments, but those skilled in the art should be clear
Chu, the various embodiments described above can be used alone as required or be combined with each other.
Although by example, some specific embodiments of the present invention have been described in detail, but the skill of this area
Art personnel are it should be understood that example above is merely to illustrate rather than in order to limit the scope of the present invention.The skill of this area
Art personnel are it should be understood that can modify to above example without departing from the scope and spirit of the present invention.This
Bright scope is defined by the following claims.
Claims (6)
1. a monitoring switch circuit, it is characterised in that include the first monitoring chip, the first pull down resistor, the first switch and two
Pole manage, described first monitoring chip have at least two monitoring pin, each described monitoring pin all through the first pull down resistor with
Earth terminal connects, and is respectively connected with one the between the combination in any of arbitrary monitoring pin and other monitoring pins and other monitoring pins
One switch, described first switch is all connected to other monitoring pins described through a diode, and wherein, the anode of described diode is equal
Being connected with described arbitrary monitoring pin, described first monitoring chip is arranged by the high electricity of described arbitrary monitoring pin output
Flat and according to described arbitrary monitoring pin and each other monitoring pins described level monitoring all described first switchs
State.
Monitoring switch circuit the most according to claim 1, it is characterised in that described first monitoring chip is provided by a MCU.
Monitoring switch circuit the most according to claim 1, it is characterised in that described monitoring switch circuit also includes the second prison
Control chip and second switch circuit, each described second switch circuit all includes second switch and the current-limiting resistance being connected in series,
And the resistance of each described current-limiting resistance is different；Described second monitoring chip has two simulation monitoring pins, a described mould
Intending monitoring pin to be connected with earth terminal through the second pull down resistor, each described second switch circuit in parallel is connected to said two mould
Intending between monitoring pin, described second monitoring chip is arranged by another described simulation monitoring pin output simulation electricity
Pressure the state according to each described second switch of the voltage monitoring between said two simulation monitoring pin.
Monitoring switch circuit the most according to claim 3, it is characterised in that described second monitoring chip is provided by a MCU.
Monitoring switch circuit the most according to claim 3, it is characterised in that described first monitoring chip and described second prison
Control chip is identity element.
6. an electronic equipment, it is characterised in that include the monitoring switch circuit according to any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610835546.8A CN106325163B (en) | 2016-09-20 | 2016-09-20 | A kind of monitoring switch circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610835546.8A CN106325163B (en) | 2016-09-20 | 2016-09-20 | A kind of monitoring switch circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106325163A true CN106325163A (en) | 2017-01-11 |
| CN106325163B CN106325163B (en) | 2019-09-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610835546.8A Active CN106325163B (en) | 2016-09-20 | 2016-09-20 | A kind of monitoring switch circuit and electronic equipment |
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| US20010013860A1 (en) * | 2000-02-10 | 2001-08-16 | Gancarcik Edward Peter | Keyboard matrix expansion |
| CN1313618A (en) * | 2000-03-10 | 2001-09-19 | 孕龙科技有限公司 | Method, circuit and device for monitoring switch |
| CN2669264Y (en) * | 2004-01-02 | 2005-01-05 | 广东科龙电器股份有限公司 | Keyboard scanning circuit |
| CN1801562A (en) * | 2005-12-12 | 2006-07-12 | 谭启仁 | Current type electricity-proof wall detection chip with transmittal circuit zero earth wire detection interface |
| US20100090746A1 (en) * | 2008-10-15 | 2010-04-15 | Sony Corporation | Switch circuit |
| US20100188872A1 (en) * | 2009-01-27 | 2010-07-29 | Murata Manufacturing Co., Ltd. | Isolated switching power supply device |
| TW201203858A (en) * | 2010-07-08 | 2012-01-16 | Hon Hai Prec Ind Co Ltd | Matrix keyboard circuit and scanning method thereof |
| CN103852720A (en) * | 2012-11-29 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Switch life test device |
| CN205333803U (en) * | 2014-08-08 | 2016-06-22 | 利萨·德雷克塞迈尔有限责任公司 | For circuit of monitor switch's on off state and including motor vehicle of said circuit |
| CN206162119U (en) * | 2016-09-20 | 2017-05-10 | 歌尔科技有限公司 | Switch monitor circuit and electronic equipment |
-
2016
- 2016-09-20 CN CN201610835546.8A patent/CN106325163B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010013860A1 (en) * | 2000-02-10 | 2001-08-16 | Gancarcik Edward Peter | Keyboard matrix expansion |
| CN1313618A (en) * | 2000-03-10 | 2001-09-19 | 孕龙科技有限公司 | Method, circuit and device for monitoring switch |
| CN2669264Y (en) * | 2004-01-02 | 2005-01-05 | 广东科龙电器股份有限公司 | Keyboard scanning circuit |
| CN1801562A (en) * | 2005-12-12 | 2006-07-12 | 谭启仁 | Current type electricity-proof wall detection chip with transmittal circuit zero earth wire detection interface |
| US20100090746A1 (en) * | 2008-10-15 | 2010-04-15 | Sony Corporation | Switch circuit |
| CN101727188A (en) * | 2008-10-15 | 2010-06-09 | 索尼株式会社 | Switch circuit |
| US20100188872A1 (en) * | 2009-01-27 | 2010-07-29 | Murata Manufacturing Co., Ltd. | Isolated switching power supply device |
| TW201203858A (en) * | 2010-07-08 | 2012-01-16 | Hon Hai Prec Ind Co Ltd | Matrix keyboard circuit and scanning method thereof |
| CN103852720A (en) * | 2012-11-29 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Switch life test device |
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| CN206162119U (en) * | 2016-09-20 | 2017-05-10 | 歌尔科技有限公司 | Switch monitor circuit and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106325163B (en) | 2019-09-17 |
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