CN102332906A - Method and system for outputting key signal - Google Patents
Method and system for outputting key signal Download PDFInfo
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- CN102332906A CN102332906A CN201110306394A CN201110306394A CN102332906A CN 102332906 A CN102332906 A CN 102332906A CN 201110306394 A CN201110306394 A CN 201110306394A CN 201110306394 A CN201110306394 A CN 201110306394A CN 102332906 A CN102332906 A CN 102332906A
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Abstract
The invention provides a method and a system for outputting a key signal and is used for solving the problems of inapplicability to complicated environment and low accuracy rate of processing of the key signal in the prior art. The method comprises the following steps that: an oscillator simultaneously inputs the same oscillation signals to two input ends of a comparator; one of the two input ends of the comparator receives an interference signal which comes from the outside and serves as key operation; and the comparator compares signals which are received by the two input ends and outputs a signal which is obtained by comparison. By adoption of the technical scheme of the invention, a key can be triggered in the complicated environment, and the accuracy rate of outputting of the key signal is improved.
Description
Technical field
The present invention relates to a kind of method and system of output key signal.
Background technology
At present, the button of use is divided into mechanical type button, capacitance type touch key and inductance type touch key-press.Wherein: the mechanical type button, its principle is simple, and manufacturing process requirement is low, and price is relatively also cheap; The basic principle of capacitance touch induced key does, if a relaxation oscillator that constantly discharges and recharges is soft-touch control not; Relaxation oscillator has fixing discharging and recharging the cycle, and frequency can be measured, if with hand or felt pen contact-making switch; Will increase the dielectric constant of electric capacity; The cycle of discharging and recharging will be elongated, and frequency will reduce, and system's judgement has produced once and touched; The basic principle of inductance type touch sensible button does; After staff is pressed onto panel; Panel can produce tens of microns bending, and the coil that the etching of panel on the bottom circuit board formed moves, and will detect because the minor variations of the magnetic flux between panel bending and the pcb board at the coil inductance formula transducer on the printed circuit board (PCB); And then cause that the minor variations of electric current in the coil, system are judged to have produced once and touch.
In the button of existing use, be homemade 50,000 times the mechanical endurance of mechanical type button Design Theory, import 100,000 times, but actual operating position is unsatisfactory; Capacitance type touch key uses the widest instantly; Complete chip has been arranged; But because it has relatively high expectations to external circuits such as power supplys, be the personal electric product so mainly use product, complex environment use fewer; Capacitance key is because trigger mechanism is the capacity effect of human body, so occur misoperation easily; The inductance type touch key-press is because the needs of interface arrangement, to the complexity of Machine Design than higher.
In the prior art, the processing of push button signalling existed be not suitable for complex environment, problem that accurate rate is low,, do not propose effective solution at present as yet for this problem.
Summary of the invention
Main purpose of the present invention provides a kind of method and system of output key signal, exists and is not suitable for complex environment, problem that accurate rate is low to solve in the prior art processing to push button signalling.
In order to address the above problem, according to an aspect of the present invention, a kind of method of output key signal is provided.
The method of output key signal of the present invention comprises: oscillator is imported identical oscillator signal simultaneously to two inputs of comparator; An input in said two inputs of said comparator also receive come from outside, as the interference signal of button operation; Said comparator compares the signal that said two inputs receive, the signal that draws after the output relatively.
A kind of system of output key signal is provided according to a further aspect in the invention.
The system of this output key signal of the present invention comprises conducting objects, oscillator and comparator, and wherein: an input in two inputs of said conducting objects and said comparator is connected; The output of said oscillator all is connected with said two inputs of said comparator; The output of said comparator is as the output of said system.
The system of another output key signal is provided according to another aspect of the invention.
The system of this output key signal of the present invention comprises conducting objects, oscillator, comparator and optimizer, and wherein: an input in two inputs of said conducting objects and said comparator is connected; The output of said oscillator all is connected with said two inputs of said comparator; The output of said comparator is connected with the input of said optimizer; The output of said optimizer is as the output of said system.
The system of another output key signal is provided according to another aspect of the invention.
The system of this output key signal of the present invention comprises conducting objects, oscillator, comparator, optimizer, inverter and isolator, and wherein: an input in two inputs of said conducting objects and said comparator is connected; The output of said oscillator all is connected with said two inputs of said comparator; The output of said comparator is connected with the input of said optimizer; The output of said optimizer is connected with the input of said inverter; The output of said inverter is connected with the input of said isolator; The output of said isolator is as the output of said system.
According to technical scheme of the present invention; Import identical oscillator signal by oscillator simultaneously to two inputs of comparator; Outside button operation signal gets into a road of comparator with the mode of interference signal; Comparator can be exported signal as push button signalling according to the difference of two-way input like this; Because adopt simple conducting objects for example sheet metal can collect the interference signal that personnel's finger touch causes, so the technical scheme of present embodiment is simple and practical, help in complex environment to realize the triggering of button.
Description of drawings
Figure of description is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the key step of the method for the output key signal of the embodiment of the invention;
Fig. 2 is the basic structure sketch map according to optimizer in the method for the output key signal of the embodiment of the invention;
Fig. 3 is the connection sketch map according to comparator in the method for the output key signal of the embodiment of the invention;
Fig. 4 is the basic structure sketch map according to isolator in the method for the output key signal of the embodiment of the invention;
Fig. 5 is the sketch map according to the chief component of the system of first kind of output key signal of the embodiment of the invention;
Fig. 6 is the sketch map according to the chief component of the system of second kind of output key signal of the embodiment of the invention; And
Fig. 7 is the sketch map according to the chief component of the system of the third output key signal of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 1 is the flow chart according to the key step of the method for the output key signal of the embodiment of the invention, and is as shown in Figure 1, and this method mainly comprises the steps:
Step S11: oscillator is imported identical oscillator signal simultaneously to two inputs of comparator;
Step S13: an input in two inputs of comparator also receive come from outside, as the interference signal of button operation;
Step S15: comparator compares the signal that draws after the output relatively to the signal of two the inputs receptions of self.
Can find out from above step; Import identical oscillator signal by oscillator simultaneously to two inputs of comparator; Outside button operation signal gets into a road of comparator with the mode of interference signal; Comparator can be exported signal as push button signalling according to the difference of two-way input like this; Because adopt simple conducting objects for example sheet metal can collect the interference signal that personnel's finger touch causes, so the technical scheme of present embodiment is simple and practical, help in complex environment to realize the triggering of button.
Preferably, can be after step S15, the signal that comparator is drawn after relatively by optimizer carries out that waveform optimization is handled and output.The effect of optimizer is that signal is simply put in order and filtering, and the antijamming capability of intensifier circuit can adopt structure shown in Figure 2, and Fig. 2 is the basic structure sketch map according to the optimizer in the method for the output key signal of the embodiment of the invention.
As shown in Figure 2; Optimizer in the present embodiment comprises first electric capacity 21, second electric capacity 23, first diode 22, second diode 24, resistance 25; Wherein: first end of first electric capacity 21 is as the input input comparison signal of optimizer, and second end is connected with first diode, 22 positive poles, second diode, 24 negative poles; The one or two utmost point 22 pipe negative poles are connected with second electric capacity, 23 first ends, resistance 25 first ends, and tie point is as the output of optimizer; Second diode, 24 positive poles, second electric capacity, 23 second ends, the equal ground connection of resistance 25 second ends.
Signal for optimizer output can be used as push button signalling and uses, and preferably can also the signal of optimizer output be for further processing then as push button signalling again; For example; Receive the signal that optimizer is exported by inverter, carry out sending to isolator after the anti-phase processing, this isolator is according to the signal of the signal output isolation processing of receiving; With the signal after the isolation processing as push button signalling, the further antijamming capability of intensifier circuit.
Fig. 3 is the connection sketch map according to comparator in the method for the output key signal of the embodiment of the invention; As shown in Figure 3, personnel hand abutment conducting objects 31, thus produce interference signal; Through getting into an input of comparator 34 after the electric capacity; Oscillator signal injects from 32, is divided into two inputs that get into comparator 34 after the two-way, the signal that obtains after output 33 outputs relatively of comparator 34.Conducting objects 31 can adopt the conductor of sheet metal or other shapes.
Fig. 4 is the basic structure sketch map according to isolator in the method for the output key signal of the embodiment of the invention; 41 is the input of isolator, in the present embodiment, is received the signal of comparator output by reverser; Perhaps receive the signal of the comparator output after optimizer is optimized by reverser; Receive the signal of reverser output again from the input 41 of isolator, 42 is the output of isolator, uses as push button signalling.
In the present embodiment; Conducting objects 31 is through other conducting medium or when directly not contacting with human body, owing to the signal of two inputs of signal comparator is identical, so the signal of the output 33 of comparator 34 is low level all the time; The low level that is input as that causes inverter like this; The reverser output also is pinned in high level, and push button signalling output 42 place's no changes can think that no push button signalling produces; Button is through other conducting medium or when directly contacting with human body; Because one road input of comparator is interfered, the two-way input signal does not match, so output 33 place's signals change; Be high level; The output of inverter signal is pinned in low level like this, causes push button signalling output 42 electric currents also to be dragged down, and thinking this moment has push button signalling to produce.
Fig. 5 is the sketch map according to the chief component of the system of first kind of output key signal of the embodiment of the invention.As shown in Figure 5, the system 50 of output key signal comprises conducting objects 51, oscillator 52 and comparator 53.Conducting objects 51 is connected with an input 54 of comparator 53; The output of oscillator 52 is connected with two inputs 53,54 of comparator 53; The output of comparator 53 is as the output of the system of output key signal.Connection among the figure is merely signal, and has omitted for example resistance etc. of relevant element among the figure, can be with reference to preceding figure, down with.
Fig. 6 is the sketch map according to the chief component of the system of second kind of output key signal of the embodiment of the invention.As shown in Figure 6, the system 60 of second kind of output key signal of the embodiment of the invention comprises conducting objects 61, oscillator 62, comparator 63 and optimizer 66, and wherein: conducting objects 61 is connected with an input 65 of comparator 63; The output of oscillator 62 is connected with two inputs 64,65 of comparator 63; The output of comparator 63 is connected with the input of optimizer 66; The output of optimizer 66 is as the output of the system of output key signal.A kind of optional structure of optimizer 66 is as shown in Figure 2.
Fig. 7 is the sketch map according to the chief component of the system of the third output key signal of the embodiment of the invention.As shown in Figure 7, the system 70 of output key signal comprises conducting objects 71, oscillator 72, comparator 73, optimizer 76, inverter 77 and isolator 78, and wherein: conducting objects 71 is connected with an input 75 of comparator 73; The output of oscillator 72 is connected with two inputs 74,75 of comparator 73; The output of comparator 73 is connected with the input of optimizer 76; The output of optimizer 76 is connected with the input of inverter 77; The output of inverter 77 is connected with the input of isolator 78; The output of isolator 78 is as the output of the system of output key signal.A kind of optional structure of optimizer 76 is as shown in Figure 2.Isolator 78 can adopt photoisolator.
According to technical scheme of the present invention; Import identical oscillator signal by oscillator simultaneously to two inputs of comparator; Outside button operation signal gets into a road of comparator with the mode of interference signal; Comparator can be exported signal as push button signalling according to the difference of two-way input like this; Because adopt simple conducting objects for example sheet metal can collect the interference signal that personnel's finger touch causes, so the technical scheme of present embodiment is simple and practical, help in complex environment to realize the triggering of button.And, adopted devices such as optimizer, isolator among the present invention, further strengthened the antijamming capability of system.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for an output key signal is characterized in that, comprising:
Oscillator is imported identical oscillator signal simultaneously to two inputs of comparator;
An input in said two inputs of said comparator also receive come from outside, as the interference signal of button operation;
Said comparator compares the signal that said two inputs receive, the signal that draws after the output relatively.
2. method according to claim 1 is characterized in that, after the signal that after said output relatively, draws, said method also comprises: optimizer carries out to the said signal that draws after relatively that waveform optimization is handled and output.
3. method according to claim 2 is characterized in that, said optimizer comprises first electric capacity, second electric capacity, first diode, second diode and resistance, wherein:
First end of said first electric capacity is as the input of said optimizer, and second end is connected with the positive pole of said first diode and the negative pole of said second diode;
The negative pole of said first diode is connected with first end of said second electric capacity and first end of said resistance, and tie point is as the output of said optimizer;
The equal ground connection of second end of second end of the positive pole of said second diode, said second electric capacity and said resistance.
4. method according to claim 2; It is characterized in that; Optimizer the said signal that draws after is relatively carried out waveform optimization is handled and output after, said method also comprises: inverter receives the signal of said optimizer output, carries out anti-phase and sends to isolator after handling; This isolator carries out isolation processing to the received signal, and the signal after the output isolation processing.
5. the system of an output key signal is characterized in that, comprises conducting objects, oscillator and comparator, wherein:
An input in two inputs of said conducting objects and said comparator is connected;
The output of said oscillator all is connected with said two inputs of said comparator;
The output of said comparator is as the output of said system.
6. the system of an output key signal is characterized in that, comprises conducting objects, oscillator, comparator and optimizer, wherein:
An input in two inputs of said conducting objects and said comparator is connected;
The output of said oscillator all is connected with said two inputs of said comparator;
The output of said comparator is connected with the input of said optimizer;
The output of said optimizer is as the output of said system.
7. system according to claim 6 is characterized in that, said optimizer comprises first electric capacity, second electric capacity, first diode, second diode and resistance, wherein:
First end of said first electric capacity is as the input of said optimizer, and second end is connected with the positive pole of said first diode, the negative pole of second diode;
The negative pole of said first diode is connected with first end of said second electric capacity and first end of said resistance, and tie point is as the output of said optimizer;
The equal ground connection of second end of second end of the positive pole of said second diode, said second electric capacity and said resistance.
8. the system of an output key signal is characterized in that, comprises conducting objects, oscillator, comparator, optimizer, inverter and isolator, wherein:
An input in two inputs of said conducting objects and said comparator is connected;
The output of said oscillator all is connected with said two inputs of said comparator;
The output of said comparator is connected with the input of said optimizer;
The output of said optimizer is connected with the input of said inverter;
The output of said inverter is connected with the input of said isolator;
The output of said isolator is as the output of said system.
9. system according to claim 8 is characterized in that, said optimizer comprises first electric capacity, second electric capacity, first diode, second diode and resistance, wherein:
First end of said first electric capacity is as the input of said optimizer, and second end is connected with the positive pole of said first diode, the negative pole of second diode;
The negative pole of said first diode is connected with first end of said second electric capacity and first end of said resistance, and tie point is as the output of said optimizer;
The equal ground connection of second end of second end of the positive pole of said second diode, said second electric capacity and said resistance.
10. according to Claim 8 or 9 described systems, it is characterized in that said isolator is a photoisolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306394A CN102332906A (en) | 2011-10-11 | 2011-10-11 | Method and system for outputting key signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306394A CN102332906A (en) | 2011-10-11 | 2011-10-11 | Method and system for outputting key signal |
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| CN102332906A true CN102332906A (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110306394A Pending CN102332906A (en) | 2011-10-11 | 2011-10-11 | Method and system for outputting key signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013053106A1 (en) * | 2011-10-11 | 2013-04-18 | 中联重科股份有限公司 | Method and system for outputting key pressing signal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0964713A (en) * | 1995-08-28 | 1997-03-07 | Yamatake Honeywell Co Ltd | Touch key |
| CN1705232A (en) * | 2004-06-03 | 2005-12-07 | 艾勒博科技股份有限公司 | Electric contact sensor and man-machine interface device using the same |
| CN2927504Y (en) * | 2006-04-28 | 2007-07-25 | 中国铝业股份有限公司 | Touched switch device for strong magnetic field |
| CN201639564U (en) * | 2010-03-12 | 2010-11-17 | 四川长虹电器股份有限公司 | Capacitance induction type key |
-
2011
- 2011-10-11 CN CN201110306394A patent/CN102332906A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0964713A (en) * | 1995-08-28 | 1997-03-07 | Yamatake Honeywell Co Ltd | Touch key |
| CN1705232A (en) * | 2004-06-03 | 2005-12-07 | 艾勒博科技股份有限公司 | Electric contact sensor and man-machine interface device using the same |
| CN2927504Y (en) * | 2006-04-28 | 2007-07-25 | 中国铝业股份有限公司 | Touched switch device for strong magnetic field |
| CN201639564U (en) * | 2010-03-12 | 2010-11-17 | 四川长虹电器股份有限公司 | Capacitance induction type key |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013053106A1 (en) * | 2011-10-11 | 2013-04-18 | 中联重科股份有限公司 | Method and system for outputting key pressing signal |
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Application publication date: 20120125 |