CN111796179A - Signal detection circuit and method of microswitch - Google Patents
Signal detection circuit and method of microswitch Download PDFInfo
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- CN111796179A CN111796179A CN201910277140.6A CN201910277140A CN111796179A CN 111796179 A CN111796179 A CN 111796179A CN 201910277140 A CN201910277140 A CN 201910277140A CN 111796179 A CN111796179 A CN 111796179A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
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Abstract
The invention discloses a signal detection circuit and a method of a microswitch. The two ends of the first end are respectively connected with a normally closed terminal of the microswitch and the resistor; the two ends of the second end are respectively connected with a normally open terminal of the microswitch and the ground; the third end is connected with a common point terminal of the micro switch; the two ends of the microcontroller are respectively connected with the first end and the third end. When the elastic sheet of the micro switch is released, the common point terminal is connected with the normally closed terminal, and when the elastic sheet of the micro switch is pressed down, the common point switch is connected with the normally open terminal.
Description
Technical Field
The present invention relates to a signal detection circuit and method for a microswitch, and more particularly, to a signal detection circuit and method for a microswitch, which can determine the operation of the microswitch by two signals.
Background
The micro switch has a micro contact interval and a quick action mechanism, works in equipment or circuits which need to be frequently switched, and is widely applied to electronic equipment (such as a mouse and the like) or household appliances (such as a refrigerator and the like). The volume of the micro switch is small, but the micro switch has irreplaceable functions.
Fig. 1 is a schematic diagram of a conventional microswitch. As shown in fig. 1, the conventional micro switch 10 includes a housing 11, a spring 12, a Common terminal (COM) 13, a normally closed terminal (NC) 14, and a normally Open terminal (NO) 15. Fig. 2 is a schematic diagram of a conventional signal detection circuit of a micro switch, and as shown in fig. 2, the conventional signal detection circuit 20 includes three terminals 201 connected to a common terminal (COM), a normally open terminal (NO), and a normally closed terminal (NC) of the micro switch, respectively. When the common point terminal 13 is conducted with the normally open terminal 15, the signal detection circuit 20 determines that the elastic sheet 12 of the micro switch 10 is pressed down, and when the common point terminal 13 is switched to be conducted with the normally closed terminal 14, the signal detection circuit 20 determines that the elastic sheet 12 of the micro switch is released.
However, when the micro switch 10 is used for a period of time or the switching time of the micro switch 10 needs to be fast, the conventional circuit is designed to determine whether the spring plate is pressed or released, which is prone to cause erroneous determination.
Therefore, how to improve the occurrence of misjudgment through the improvement of circuit design to overcome the above-mentioned defects has become one of the important issues to be solved by the above-mentioned industry.
Disclosure of Invention
The present invention provides a signal detection circuit and method for a micro switch, which is directed to overcome the shortcomings in the prior art, and improves the situation that the conventional signal detection circuit and method are prone to misjudgment.
In order to solve the above technical problems, one of the technical solutions of the present invention is to provide a signal detection circuit of a micro switch, which includes a first terminal, a second terminal, a third terminal, and a microcontroller. The two ends of the first end are respectively connected with a normally closed terminal of the microswitch and the resistor; the two ends of the second end are respectively connected with a normally open terminal of the microswitch and the ground; the third end is connected with a common point terminal of the micro switch; the two ends of the microcontroller are respectively connected with the first end and the third end. When the elastic sheet of the micro switch is released, the common point terminal is connected with the normally closed terminal, and when the elastic sheet of the micro switch is pressed down, the common point switch is connected with the normally open terminal.
Furthermore, when the common terminal is connected to the normally closed terminal, the microcontroller measures high-potential signals at the first end and the third end respectively.
Furthermore, when the common terminal is connected with the normally open terminal, the microcontroller measures high potential signals at the first end and the third end respectively.
Furthermore, when the microcontroller measures a high potential signal and a low potential signal at the first end and the third end respectively, the microcontroller determines whether the elastic piece of the micro switch is not actuated or is in malfunction.
Furthermore, when the microcontroller measures a low potential signal and a high potential signal at the first end and the third end respectively, the microcontroller determines whether the elastic piece of the micro switch is not actuated or is in malfunction.
In order to solve the above technical problem, another technical solution of the present invention is to provide a method for detecting a signal of a micro switch, including: connecting a first end of the signal detection circuit with a normally closed terminal of the micro switch, connecting a second end of the signal detection circuit with a normally open terminal of the micro switch, and connecting a third end of the signal detection circuit with a common point terminal of the micro switch; when the common-point terminal of the microswitch is connected with the normally closed terminal, the microcontroller of the signal detection circuit respectively measures high-potential signals at the first end and the second end of the signal detection circuit; when the common-point terminal of the micro switch is connected with the normally open terminal, the microcontroller respectively measures low potential signals at the first end and the second end of the signal detection circuit; and when the microcontroller respectively measures a high potential signal and a low potential signal or a low potential signal and a high potential signal at the first end and the second end of the signal detection circuit, the microcontroller judges that the elastic sheet of the microswitch does not have any action.
Furthermore, when the microcontroller of the signal detection circuit respectively measures high-potential signals at the first end and the third end of the signal detection circuit, an elastic sheet of the microswitch is in a release state.
Furthermore, when the microcontroller of the signal detection circuit respectively measures low potential signals at the first end and the third end of the signal detection circuit, an elastic sheet of the micro switch is in a pressed-down state.
Furthermore, when the microcontroller respectively measures a high potential signal and a low potential signal or respectively measures a low potential signal and a high potential signal at the first end and the third end of the signal detection circuit, the microcontroller judges that the elastic sheet of the microswitch is in false operation.
Compared with the prior art that whether the elastic sheet of the microswitch is pressed down or released is judged by only one signal, the method and the device can judge and confirm the action of the elastic sheet of the microswitch more accurately and more quickly through two signals.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic diagram of a conventional microswitch.
Fig. 2 is a schematic diagram of a signal detection circuit of a conventional microswitch.
Fig. 3A is a schematic circuit diagram of the microswitch according to the embodiment of the invention when the elastic sheet is released.
Fig. 3B is a schematic circuit diagram of the microswitch according to the embodiment of the invention when the elastic sheet is pressed down.
Fig. 4 is a flow chart of the signal detection method of the microswitch of the invention.
Detailed Description
The following is a description of the embodiments of the present disclosure relating to "signal detection circuit and method for microswitch" by specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
[ embodiment of Signal detection Circuit ]
Fig. 3A is a schematic circuit diagram of the microswitch according to the embodiment of the invention when the spring plate is released, and fig. 3B is a schematic circuit diagram of the microswitch according to the embodiment of the invention when the spring plate is pressed down.
Referring to fig. 3A and 3B, a signal detection circuit 30 of a micro switch according to a preferred embodiment of the present invention includes a first terminal 301, a second terminal 302, a third terminal 303, and a micro controller 304. The two ends of the first end 301 are respectively connected to a normally closed terminal (NC) of the micro switch and a resistor 305, and the resistance value of the resistor 305 is preferably 1M ohm. The second end 302 has two ends respectively connected to the normally open terminal (NO) of the micro switch and the ground, the third end 303 is connected to the common point terminal (COM) of the micro switch, and the microcontroller 304 has two ends respectively connected to the first end 301 and the third end 303.
As shown in fig. 3A, when the spring plate of the micro switch is released, the common point terminal (COM) and the normally closed terminal (NC) are connected, the micro controller 304 respectively measures a high-potential signal (signal is 11) at the first end 301 and the third end 303 of the signal detection circuit 30 of the micro switch, and when the spring plate of the micro switch is pressed down (press), the common point terminal (COM) and the normally open terminal (NO) are connected, the micro controller 304 respectively measures a low-potential signal or NO signal (signal is 00) at the first end 301 and the third end 303 of the signal detection circuit 30 of the micro switch, and when the micro controller 304 respectively measures a high-potential signal and a low-potential signal (signal is 10) at the first end 301 and the third end 303 of the signal detection circuit 30 of the micro switch, or when the micro controller 304 respectively measures a low-potential signal and a high-potential signal (signal is 01) at the first end 301 and the third end 303 of the signal detection circuit 30 of the micro switch, the microcontroller 304 determines that the elastic piece of the micro switch is not actuated or is in malfunction, that is, the elastic piece of the micro switch is not released or pressed down, or the signal detected by the microcontroller is an error signal. In other words, if the microcontroller 304 measures a high-potential signal and a low-potential signal or a low-potential signal and a high-potential signal at the first end 301 and the third end 303 of the signal detection circuit 30 of the micro switch, the microcontroller 304 determines that the micro switch is not released or the spring plate is pressed down or the micro switch malfunctions at the moment, and does not determine that the spring plate of the micro switch has any action.
Compared with the prior art that whether the elastic sheet of the microswitch is pressed down or released is judged by only one signal, the invention can judge and confirm the action of the elastic sheet of the microswitch more accurately and more quickly by two signals.
Therefore, the signal detection circuit 30 of the micro switch of the present invention can make the micro switch applied to an electronic product (e.g. a computer mouse) requiring a fast response, and can avoid the occurrence of a situation that the electronic product has an action misjudgment due to poor contact between the elastic sheet and the contact point caused by the loss of the electrical apparatus of the micro switch due to long use.
[ examples of Signal detection methods ]
Fig. 4 is a flow chart of the signal detection method of the microswitch of the invention. As shown in fig. 4, in step S401, the first end 301 of the signal detection circuit 30 is connected to the normally closed terminal (NC) of the micro switch, the second end 302 of the signal detection circuit 30 is connected to the normally open terminal (NO) of the micro switch, and the third end 303 of the signal detection circuit is connected to the common terminal (COM) of the micro switch. In step S402, when the elastic piece of the micro switch is released, the common point terminal (COM) is connected to the normally closed terminal (NC), and the micro controller 304 measures signals with high potentials at the first end 301 and the third end 303 of the signal detection circuit, respectively. When the elastic piece of the micro switch is released, the common point terminal (COM) of the micro switch is conducted with the normally closed terminal (NC), so that the first end 301 and the third end 303 of the signal detection circuit 30 measure a high-potential signal, and the signal detection circuit 30 knows that the elastic piece of the micro switch is released at the moment.
In step S403, when the elastic piece of the micro switch is pressed down, the common terminal (COM) of the micro switch is connected to the normally open terminal (NO), and the micro controller 304 measures low-level signals at the first end 301 and the third end 303 of the signal detection circuit 30, respectively. When the elastic piece of the micro switch is pressed down, the common point terminal (COM) of the micro switch is conducted with the normally open terminal (NO), so the first end 301 and the third end 303 of the signal detection circuit 30 measure a low-potential signal, and the signal detection circuit 30 knows that the elastic piece of the micro switch is in a release state at the moment. In step S404, when the microcontroller 304 measures the high-potential and low-potential signals or the low-potential and high-potential signals at the first end 301 and the third end 303 of the signal detection circuit 30, the microcontroller 304 determines that the elastic piece of the micro switch does not have any action or is in a malfunction state at this time.
[ advantageous effects of the embodiments ]
Compared with the prior art that whether the elastic sheet of the microswitch is pressed down or released is judged by only one signal, the method and the device can judge and confirm the action of the elastic sheet of the microswitch more accurately and more quickly through two signals.
The disclosure above is only a preferred and practical embodiment of the present invention, and is not intended to limit the scope of the claims, so that all technical equivalents that can be made by using the contents of the specification and the drawings are included in the claims.
Claims (9)
1. A signal detection circuit for a microswitch, comprising:
the two ends of the first end are respectively connected with a normally closed terminal and a resistor of the microswitch;
the two ends of the second end are respectively connected with a normally open terminal of the microswitch and the ground;
a third terminal connected to a common terminal of the micro switch; and
the two ends of the microcontroller are respectively connected with the first end and the third end;
when one elastic sheet of the micro switch is released, the common point terminal is connected with the normally closed terminal, and when the elastic sheet of the micro switch is pressed down, the common point switch is connected with the normally open terminal.
2. The micro-switch signal detection circuit of claim 1, wherein when the common terminal is connected to the normally closed terminal, the micro-controller measures a high-potential signal at the first end and the third end, respectively.
3. The micro-switch signal detection circuit of claim 1, wherein when the common terminal is connected to the normally open terminal, the micro-controller measures a high voltage signal at the first terminal and the third terminal, respectively.
4. The micro-switch signal detection circuit according to claim 1, wherein when the micro-controller measures a high potential signal and a low potential signal at the first end and the third end, respectively, the micro-controller determines whether the spring of the micro-switch is not actuated or is malfunctioning.
5. The micro-switch signal detection circuit according to claim 1, wherein when the micro-controller measures a low potential signal and a high potential signal at the first end and the third end, respectively, the micro-controller determines whether the elastic piece of the micro-switch is not actuated or is malfunctioning.
6. A method for detecting a signal of a microswitch, comprising:
connecting a first end of a signal detection circuit with a normally closed terminal of the micro switch, connecting a second end with a normally open terminal of the micro switch, and connecting a third end with a common point terminal of the micro switch;
when a common point terminal of the microswitch is connected with a normally closed terminal, a microcontroller of the signal detection circuit respectively measures high potential signals at the first end and the third end of the signal detection circuit;
when the common point terminal of the micro switch is connected with a normally open terminal, the microcontroller respectively measures low potential signals at the first end and the third end of the signal detection circuit; and
when the microcontroller respectively measures the high potential signal and the low potential signal or respectively measures the low potential signal and the high potential signal at the first end and the third end of the signal detection circuit, the microcontroller judges that the elastic sheet of the microswitch does not have any action.
7. The method as claimed in claim 6, wherein when the microcontroller of the signal detection circuit measures the high-voltage signal at the first end and the third end of the signal detection circuit, a spring plate of the micro switch is released.
8. The method as claimed in claim 6, wherein when the microcontroller of the signal detection circuit measures the low voltage signal at the first end and the third end of the signal detection circuit, a spring of the micro switch is in a depressed state.
9. The method as claimed in claim 6, wherein the microcontroller determines the elastic piece of the micro switch to be a malfunction when the microcontroller measures the high potential signal and the low potential signal or measures the low potential signal and the high potential signal respectively at the first end and the third end of the signal detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277140.6A CN111796179B (en) | 2019-04-08 | 2019-04-08 | Signal detection circuit and method of micro switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277140.6A CN111796179B (en) | 2019-04-08 | 2019-04-08 | Signal detection circuit and method of micro switch |
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| CN111796179A true CN111796179A (en) | 2020-10-20 |
| CN111796179B CN111796179B (en) | 2023-05-30 |
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| CN201910277140.6A Active CN111796179B (en) | 2019-04-08 | 2019-04-08 | Signal detection circuit and method of micro switch |
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| JP2007273389A (en) * | 2006-03-31 | 2007-10-18 | Energy Support Corp | Switch |
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| CN105425144A (en) * | 2015-11-11 | 2016-03-23 | 浙江中控自动化仪表有限公司 | Relay fault detection circuit and fault detection method thereof |
| CN205176218U (en) * | 2015-10-28 | 2016-04-20 | 广东小天才科技有限公司 | Micro -gap switch testing arrangement |
| TW201616290A (en) * | 2014-10-29 | 2016-05-01 | 原相科技股份有限公司 | Amending circuit capable of switching mouse into different detecting modes |
| CN205910312U (en) * | 2016-07-08 | 2017-01-25 | 厦门市新峰工贸有限公司 | Break -make of micro -gap switch subassembly detects frock |
| CN106571261A (en) * | 2016-11-14 | 2017-04-19 | 许继电气股份有限公司 | Three-position operating mechanism work state monitoring method |
| TW201807545A (en) * | 2016-08-15 | 2018-03-01 | 明基電通股份有限公司 | Input device and method capable of avoiding error action of switch |
| CN207082463U (en) * | 2017-08-24 | 2018-03-09 | 惠州市弘宝电器有限公司 | A kind of microswitch |
| CN109444732A (en) * | 2018-11-21 | 2019-03-08 | 格力电器（武汉）有限公司 | A kind of micro-switch testing device and method |
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2019
- 2019-04-08 CN CN201910277140.6A patent/CN111796179B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117189A (en) * | 1990-02-21 | 1992-05-26 | Eaton Corporation | Automatic testing apparatus for electrical switches |
| JP2007273389A (en) * | 2006-03-31 | 2007-10-18 | Energy Support Corp | Switch |
| TW201616290A (en) * | 2014-10-29 | 2016-05-01 | 原相科技股份有限公司 | Amending circuit capable of switching mouse into different detecting modes |
| CN105372584A (en) * | 2015-10-28 | 2016-03-02 | 广东小天才科技有限公司 | Microswitch testing method, device and system |
| CN205176218U (en) * | 2015-10-28 | 2016-04-20 | 广东小天才科技有限公司 | Micro -gap switch testing arrangement |
| CN105425144A (en) * | 2015-11-11 | 2016-03-23 | 浙江中控自动化仪表有限公司 | Relay fault detection circuit and fault detection method thereof |
| CN205910312U (en) * | 2016-07-08 | 2017-01-25 | 厦门市新峰工贸有限公司 | Break -make of micro -gap switch subassembly detects frock |
| TW201807545A (en) * | 2016-08-15 | 2018-03-01 | 明基電通股份有限公司 | Input device and method capable of avoiding error action of switch |
| CN106571261A (en) * | 2016-11-14 | 2017-04-19 | 许继电气股份有限公司 | Three-position operating mechanism work state monitoring method |
| CN207082463U (en) * | 2017-08-24 | 2018-03-09 | 惠州市弘宝电器有限公司 | A kind of microswitch |
| CN109444732A (en) * | 2018-11-21 | 2019-03-08 | 格力电器（武汉）有限公司 | A kind of micro-switch testing device and method |
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| CN111796179B (en) | 2023-05-30 |
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