CN107783442A - The method that electronic switch uses debounce under water - Google Patents
The method that electronic switch uses debounce under water Download PDFInfo
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- CN107783442A CN107783442A CN201610720164.0A CN201610720164A CN107783442A CN 107783442 A CN107783442 A CN 107783442A CN 201610720164 A CN201610720164 A CN 201610720164A CN 107783442 A CN107783442 A CN 107783442A
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- electronic switch
- operating voltage
- voltage
- debounce
- under water
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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
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Keying Circuit Devices (AREA)
- Electronic Switches (AREA)
Abstract
A kind of method for using debounce under water the invention discloses electronic switch, this method to electronic switch by providing the periodically alternate operating voltage of height, suitable sampling time point is chosen by debugging using the characteristic of water resistance, accurate signal is gathered and is analyzed so as to judge whether pressed by people positioned at underwater electronic switch.Compared to the smearing marine glue in electronic switch or the structure of electronic switch, which is improved, makes it possess waterproof construction, this method takes the mode of software and hardware combining, with regard to that can enable electronic switch normal work under water on the premise of without water-proofing treatment, this method has huge cost advantage.
Description
Technical field
The present invention relates to electronic technology field, more specifically, it relates to which a kind of electronic switch uses the side of debounce under water
Method.
Background technology
In some cases, it is desirable to electronic switch is operated under water.But because water is conductive, the electricity that is put into water
Sub switch, even if not being pressed, it can also be turned on by water.It is the common connection of electronic switch and chip such as Fig. 1.Electronic switch
SB is connected R with pull-up resistor, pull-up resistor R other end access power supply V1, and the electronic switch SB other end is grounded, electronic cutting
Close the I/O interfaces of SB and pull-up resistor R tie point access chip.In the case where SB disconnects, the I/O interfaces of chip are high electricity
Flat input；And when SB closes, the I/O interfaces of chip input for low level.When electronic switch is put into underwater, electronic switch
Two contacts are turned on by water, and the input of the I/O interfaces of chip is changed into low level from high level.
Learnt by the characteristics of motion of electric charge, negatively charged son in the electric field can be towards motion at high potential.Electronic switch is put into water
Its two contact produces electric field because of potential difference after lower, and the negatively charged particle in water can be from the contact of low potential to the contact of high potential
Motion, so as to produce the electric current for flowing through electronic switch.The negatively charged particle in water is uniformly distributed in its natural state, in electronic cutting
Put into the moment in water, the movement rate highest of the negatively charged particle in water in the electric field, with collecting in high potential contact
The concentration of the negatively charged particle at place is raised, and the negatively charged particle in electric field can be reduced gradually to the speed that high potential contact is moved.
From the water resistance macroscopically seen between two contacts for being just embodied in electronic switch since the moment that electronic switch is turned on by water by
Edge up height.
After being turned on due to electronic switch by water, the water resistance between pull-up resistor and two contacts of electronic switch forms partial pressure
Circuit, the input voltage voltage that actually water resistance is got of the I/O interfaces of chip.After electronic switch is turned on by water, electronic cutting
The water resistance closed between two contacts gradually increases, and the input voltage of the I/O interfaces of chip also increases therewith, eventually makes chip
The input of I/O interfaces is changed into high level from low level.In whole process, someone did not touched electronic switch, and chip
The input of I/O interfaces is changed into low level from high level and is changed into high level again, can be shaken when being operated under water here it is electronic switch
The reason for.Shake normally results in electronic switch can not normal use under water.
In the prior art, to make electronic switch normal work under water, usually in electronic switch smear marine glue or
It is that the structure of electronic switch is improved to make its structure that there is water-proof function.Both ways can increase being manufactured into for electronic switch
This, this is obviously difficult to receive in large batch of production.
The content of the invention
A kind of method for using debounce under water it is an object of the invention to provide electronic switch, to reduce electronic switch in water
The lower cost used.
To achieve the above object, the invention provides following technical scheme：
A kind of method that electronic switch uses debounce under water, comprises the following steps:
S1. the periodically alternate operating voltage of height is provided to electronic switch；
S2. voltage test acquisition is carried out to the hot end of electronic switch using sampling module in operating voltage output HIGH voltage,
Using collection voltages be more than sampling module resolution ratio when time point as push button signalling sampling initial time, by operating voltage by
The time point of high step-down is sampled as push button signalling and terminates the time, and push button signalling is sampled into the termination time and push button signalling samples
Period between time beginning is as push button signalling sampling time section；
S3. the time point in push button signalling sampling time section is chosen as push button signalling sampling time point, and at the time point
On the basis of carry out periodic samples synchronous with operating voltage and obtain sampled signal；
S4. analysis is carried out to the magnitude of voltage of sampled signal and judges whether electronic switch is pressed by people.
By such scheme, can be risen in the partial pressure on the water resistance between two contacts of electronic switch more than sampling
Signal sampling is carried out after the resolution ratio of module, so as to detect the effective level change of electronic switch, be accurately judged to be
No someone presses electronic switch, electronic switch also can be normally played a role under water.
Preferably：Multiple repairing weld in a sampling time section is additionally included in S3 steps and obtains multiple sampling letters
Number, the step of also including being analyzed obtained each sampled signal to exclude the interference signal in S4 steps.
By such scheme, influence of the interference signal to push button signalling can be eliminated, avoids judging by accident.
Preferably：The waveform of the operating voltage is square wave.
Preferably：The waveform of the operating voltage is half-sinusoid.
Preferably：The S2 steps also include the resistance of the pull-up resistor of electronic switch is adjusted.
Preferably：For copper sheet type electronic switch, the first step includes one end offer to electronic switch
Periodically alternate first operating voltage of height and other end offer periodically height alternately the second work to electronic switch
Voltage, wherein the cycle phase of the first operating voltage and the second operating voltage is same, the phase of the first operating voltage and the second operating voltage
Position difference 180 degree.
Compared with prior art, it is an advantage of the invention that：Compared to the smearing marine glue in electronic switch or to electronics
The structure of switch, which is improved, makes it possess waterproof construction, and this method takes the mode of software and hardware combining, without water-proofing treatment
Under the premise of with regard to electronic switch normal work under water can be enable, this method has huge cost advantage.
Brief description of the drawings
Fig. 1 is the schematic diagram of the mode of connection that Single Electron switchs in embodiment one；
Fig. 2 is the schematic diagram of the mode of connection of multiple electronic switches in embodiment one；
Fig. 3 is the principle schematic of electronic switch underwater operation in embodiment one；
Fig. 4 is the principle schematic of electronic switch underwater operation in embodiment two；
Fig. 5 is the schematic diagram of the mode of connection of multiple electronic switches in embodiment three；
Fig. 6 is the principle schematic of electronic switch underwater operation in embodiment three；
Fig. 7 is the principle schematic of electronic switch underwater operation in example IV；
Fig. 8 is the schematic diagram of the mode of connection that Single Electron switchs in embodiment five.
Embodiment
Embodiment one：
Reference picture 1, electronic switch is connected with pull-up resistor, the other end ground connection of electronic switch, the other end intervention of pull-up resistor
The tie point of power supply V, pull-up resistor and electronic switch is connected with the I/O interfaces of I/O chips, the output end and mainboard of I/O chips
Connection.
Reference picture 2, power supply V waveform is half-sinusoid.Power supply V sinusoidal waveform section is high voltage section, and other
Section is low-voltage section.The electronic switch that will be switched off is put into water, in high voltage section, two contacts of electronic switch it
Between form electric field.Negatively charged particle in water in the presence of the electric field from the earthing contact (low potential contact) of electronic switch to
The contact that electronic switch is connected with pull-up resistor（High potential contact）Motion, so as to form the electric current for flowing through electronic switch, electronics
Switch is turned on by water, and pull-up resistor forms bleeder circuit with water resistance.In the moment that electronic switch is switched on, because band is negative in water
The rate travel of charged particle is higher, and water resistance is just smaller, and hereafter water resistance persistently increases, and the voltage that water resistance is got also increases therewith
Greatly, the input voltage of I/O interfaces also increases.And in power supply V low-voltage section, due to the electricity between the contact of electronic switch two
Field, which significantly weakens, even to disappear, the negatively charged particle collected at the high potential contact before electronic switch can free diffusing, make
Negatively charged particle in water tends to be uniform, and water resistance reduces therewith, and the input of I/O interfaces is changed into low level, and works as power supply V again
During output HIGH voltage, water resistance again will increase, so circulation.
Generally, the input for judging I/O interfaces is high level or low level standard is：The input electricity of I/O interfaces
Pressure is judged as I/O interfaces input when being more than 1/3Vcc is that high level --- i.e. electronic switch is off；And I/O interfaces
Input voltage the inputs of I/O interfaces is judged as when being less than 1/4Vcc is low level --- i.e. electronic switch, which is in, closes state
（Wherein Vcc is the operating voltage of chip）, this is the resolution ratio of I/O chips.When the voltage got on water resistance rises to greatly
Before 1/4Vcc, that is, make one not go to press electronic switch, I/O interfaces also input low level；And when the electricity got on water resistance
Pressure is risen to more than after 1/3Vcc, if nobody goes to press resistance switch, I/O interfaces can input high level.
Obviously, after electronic switch is put into water, before water resistance increases to the 1/3 of pull-up resistor, I/O interfaces are entered
Row voltage acquisition, inherently there is a situation where to gather by mistake, so as to cause to judge by accident.And to ensure the accuracy of collection, just should be
Water resistance increases to after the 1/3 of pull-up resistor the voltage for gathering I/O interfaces again.For convenience of description, water resistance is increased to
Pull-up resistor 1/3 when time point be defined as t.
, it is necessary to be debugged after electronic switch is connected with chip --- it is exactly specifically the voltage to I/O interfaces
Acquisition time is adjusted.
In the present embodiment, the regulation to the voltage acquisition time point of I/O interfaces is realized by program.By chip institute
Mainboard be connected with compunlcation after, in translation and compiling environment run debounce program, time point of the debounce program to voltage acquisition
Control by the way of SECO, a cycle at intervals of power supply V of adjacent two acquisition time.To in debounce program
Acquisition time be adjusted, after making the time point t that acquisition time is located in power supply V high voltage section, will debug
Good debounce program burn writing enters in mainboard.The power supply V periodically alternate voltages of output height are for the collection to I/O interfaces
Time point provides reference, makes the rhythm having time rule of collection, according to voltage-stabilized power supply, then not can determine that the sampling of I/O interfaces
Time point.
, can be by adjusting the resistance of pull-up resistor in addition, on the premise of the voltage acquisition time point of I/O interfaces is not adjusted
Value is debugged.Because for identical water quality, under same electric-field intensity, the movement rate of electronegative particle in water
Variation tendency be consistent, that is to say, that the water resistance time used when rising to certain value is certain, and is not being possessed
In the case of carrying out program debugging, it can be completed by the use of adjustable resistance as pull-up resistor by adjusting the resistance of adjustable resistance
Debugging, enables water resistance to rise to the 1/3 of the current resistance of adjustable resistance in fixed I/O interface voltage acquisition times.
Reality it is underwater in use, due to the time point of electronic switch is located in power supply V high voltage section when
Between period before point t not collection voltages, people goes to press electronic switch within the period, and mainboard does not have any response,
Therefore the judgement of push button signalling is not influenceed；And the level signal of I/O interfaces is acquired after time point t, I/O interfaces
Level has been changed to high level, and the level of I/O interfaces would not change again if people does not go by electronic switch, is considered as no button letter
Number, if but now someone presses electronic switch, the level of I/O interfaces can be changed into low level at once from high level, be considered as have by
Key signals, the voltage of I/O interfaces is gathered after time point t and coordinates debounce program just can accurately detect whether that someone presses
Positioned at underwater electronic switch, when detecting that electronic switch is pressed, mainboard responds the corresponding action of execution.In electronics
After switch is depressed, to ensure accurately detect the push action of human hand next time, it is necessary to make two contacts of electronic switch
Between water resistance be promptly restored to initial value, that is to say, that, it is necessary to adjust voltage V output after electronic switch is pressed,
Power supply V is set to export low-voltage, in order to which water resistance reduces rapidly.In the present embodiment, the voltage acquisition time point of I/O interfaces is optimal
For in power supply V output voltage by the moment before high step-down（Referring to Fig. 2, the arrow in Fig. 2 is that the voltage for representing I/O interfaces is adopted
Collect time point）., can normal use electronic switch under water by such scheme.
In general, power supply V cycle is that Millisecond is other, and the finger that its cycle is less than common people quickly presses piezoelectricity twice
The time interval of sub switch.So, when people presses electronic switch at random, it also can guarantee that the push action of human hand is accurately detected
Arrive, avoid the occurrence of people and press electronic button before the time point t of power supply V high voltage section and can't detect the pressing of human hand
The awkward situation of action.In theory, voltage V cycle is shorter, more can accurately be detected when human hand presses electronic switch at random
Push action.
It is to be noted that：Electronic switch is under water in use, the unavoidable interference signal having in water is to push button signalling
Collection interferes, and causes erroneous judgement.Therefore, it is necessary to eliminate influence of the interference signal to sampling.By being set to debounce program
Put, make it have the tally function of sampling number, debounce program is while control is to I/O sampling interfaces to sampling number meter
Number, does not immediately treat in the signal for collecting I/O interfaces for the first time, does not also handle for the second time, to just handling for the third time, prevent from doing
Disturb judgement of the effect of signals to push button signalling.Because the duration of interference signal is very of short duration, and human hand is by pressing off
When pass, a brief stay time is had, this time is much larger than the signal period --- i.e. much larger than signal acquisition twice
Time interval, that is to say, that the duration of interference signal be much smaller than human hand pressing electronic switch duration, lead to
Cross signal acquisition three times and the level height to sampled signal is analyzed, if the continuous signal collected three times is low level
Signal then illustrates it is human hand pressing electronic switch, rather than is interference signal, is enough to distinguish human hand pressing by this fault tolerant mechanism
Or interference signal, improve the accuracy of judgement.
Embodiment two：
The difference of embodiment two and embodiment one is square wave in the output voltage waveforms of the power supply V in embodiment two, reference
Fig. 3.Compared to the power supply that output voltage waveforms are half-sinusoid, output voltage waveforms are the power supply V of square wave, in its high level area
Section, the speed variation tendency that the negatively charged particle in water is moved between two contacts of electronic switch more preferably prejudges --- i.e. water power
The change variation tendency of resistance more preferably judges, convenient debugging, shortens debug time.
Embodiment three：
The present embodiment is directed to using electronic switch made of the higher metal of activity.Below with common copper sheet type electronic switch
To be described in detail:
Because the activity of copper is higher than steel, copper sheet type electronic switch is more easy to be corroded under water than stainless steel chip electronic switch.
Therefore, for copper sheet type electronic switch uses under water, it is particularly important to extend its service life.
Reference picture 5, electronic switch is connected with pull-up resistor, the other end connection power supply V1 of pull-up resistor, electronic switch
Other end connection power supply V2.
Reference picture 6, power supply V1 and power supply V2 output voltage waveforms are sine wave, and power supply V1 output voltage waveforms
The same and phase of two waveforms differs 180 degree with the cycle phase of power supply V2 output voltage wave.Here, power supply V1 and V2 output
Voltage is always positive voltage, and wherein the upper half of voltage waveform is high voltage section, and the lower half of voltage waveform is low-voltage
Section.
The voltage acquisition of I/O interfaces power supply V1 high voltage section, and the time point gathered be located at power supply V1 output
Moment before being changed into low-voltage section from high voltage section.In power supply V1 output HIGH voltages, power supply V2 output low-voltages, now
The high potential contact of electronic switch is the contact being connected with pull-up resistor, and the copper sheet of electronic switch discharges electricity in the presence of electric field
Galvano-cautery, copper sheet positively charged occur for son, copper sheet；And in power supply V2 output HIGH voltages, power supply V1 exports low-voltage, now electronics
Two contact directions of an electric field of switch can be reverse, the negatively charged particle counter motion in water, the electronics that negative particles carry by band just
The copper sheet of electricity attracts, and copper sheet obtains the supplement of electronics, and when power supply V1 output HIGH voltages again, copper sheet can discharge electronics again,
So circulation.By the program, copper sheet can be slowed down and be corroded, extend the life-span that copper sheet type electronic switch uses under water.
Example IV：
The difference of the present embodiment and embodiment three is that power supply V1 and power supply V2 output voltage waveforms are square wave, and two is electric
The high level in source is 5V, and low level is 0V.In a cycle, power supply V1 high level lasting time is less than its low level
Duration, power supply V2 and power supply V1 cycle, high level lasting time and low duration all same（t1=t2）, electricity
Source V2 is different from power supply V1 phase, and the time point of power supply V2 rising edge overlaps with the time point of power supply V1 trailing edge, sees
Fig. 7.In the present embodiment, the voltage acquisition time point of I/O interfaces is identical with embodiment three.
Compared with sine voltage under square-wave voltage, in the electric field between two contacts of electronic switch, negatively charged particle
The variation tendency of movement rate more preferably judge, debug time can be shortened.
Embodiment five：
The difference of embodiment five and the mode of connection of embodiment three is I/O chips being changed to a/d converter, reference picture 8.
The power supply of embodiment five sets identical with example IV.
For I/O chips, because I/O chips need just detect button until the partial pressure of water resistance is more than 1/3Vcc
Signal；And a/d converter has higher resolution ratio, it rises to 1/3Vcc without waiting for the partial pressure of water resistance.Therefore for AD
It converter, can shift to an earlier date for the time point of push button signalling collection, can so start to gather signal earlier, shorten signal and adopt
The cycle of collection；In addition, during with a/d converter, repeatedly carrying out the time interval of signal acquisition can shorten, can be fault-tolerant before
The signal acquisition of more numbers is carried out in the time of machining function, the accuracy of judgement is improved, more effectively eliminates interference signal
Influence.
Compared to the smearing marine glue in electronic switch or the structure of electronic switch, which is improved, makes it possess waterproof construction,
This method takes the mode of software and hardware combining, normal under water with regard to that can enable electronic switch on the premise of without water-proofing treatment
Work, this method have huge cost advantage.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of method that electronic switch uses debounce under water, it is characterized in that, comprise the following steps:
S1. the periodically alternate operating voltage of height is provided to electronic switch；
S2. voltage test acquisition is carried out to the hot end of electronic switch using sampling module in operating voltage output HIGH voltage,
Using collection voltages be more than sampling module resolution ratio when time point as push button signalling sampling initial time, by operating voltage by
The time point of high step-down is sampled as push button signalling and terminates the time, and push button signalling is sampled into the termination time and push button signalling samples
Period between time beginning is as push button signalling sampling time section；
S3. the time point in push button signalling sampling time section is chosen as push button signalling sampling time point, and at the time point
On the basis of carry out periodic samples synchronous with operating voltage and obtain sampled signal；
S4. analysis is carried out to the magnitude of voltage of sampled signal and judges whether electronic switch is pressed by people.
2. the method that electronic switch according to claim 1 uses debounce under water, it is characterized in that：Also include in S3 steps
Multiple repairing weld obtains multiple sampled signals in a sampling time section, also includes believing obtained each sampling in S4 steps
The step of number analysis to exclude the interference signal.
3. the method that electronic switch according to claim 1 uses debounce under water, it is characterized in that：The ripple of the operating voltage
Shape is square wave.
4. the method that electronic switch according to claim 1 uses debounce under water, it is characterized in that：The ripple of the operating voltage
Shape is half-sinusoid.
5. the method that electronic switch according to claim 1 uses debounce under water, it is characterized in that：The S2 steps also include
The resistance of the pull-up resistor of electronic switch is adjusted.
6. the method that electronic switch according to claim 1 uses debounce under water, it is characterized in that：For copper sheet type electronic cutting
Close, the first step includes providing periodically just alternate first operating voltage and to electronics to one end of electronic switch
The other end of switch provides periodically the second operating voltage of height alternating, wherein the week of the first operating voltage and the second operating voltage
Phase is identical, the phase difference 180 degree of the first operating voltage and the second operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720164.0A CN107783442B (en) | 2016-08-24 | 2016-08-24 | Method for removing tremble in underwater use of electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720164.0A CN107783442B (en) | 2016-08-24 | 2016-08-24 | Method for removing tremble in underwater use of electronic switch |
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| Publication Number | Publication Date |
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| CN107783442A true CN107783442A (en) | 2018-03-09 |
| CN107783442B CN107783442B (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610720164.0A Active CN107783442B (en) | 2016-08-24 | 2016-08-24 | Method for removing tremble in underwater use of electronic switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285543A (en) * | 2020-09-18 | 2021-01-29 | 昆明理工大学 | Lead fish underwater signal acquisition device based on alternating current signal transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117520Y (en) * | 2007-11-01 | 2008-09-17 | 中国科学院声学研究所 | Underwater switch |
| CN204390984U (en) * | 2015-01-19 | 2015-06-10 | 宁乡县职业中专学校 | A kind of magnetic force automatic water level control switch |
-
2016
- 2016-08-24 CN CN201610720164.0A patent/CN107783442B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117520Y (en) * | 2007-11-01 | 2008-09-17 | 中国科学院声学研究所 | Underwater switch |
| CN204390984U (en) * | 2015-01-19 | 2015-06-10 | 宁乡县职业中专学校 | A kind of magnetic force automatic water level control switch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285543A (en) * | 2020-09-18 | 2021-01-29 | 昆明理工大学 | Lead fish underwater signal acquisition device based on alternating current signal transmission |
| CN112285543B (en) * | 2020-09-18 | 2023-03-07 | 昆明理工大学 | Lead fish underwater signal acquisition device based on alternating current signal transmission |
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| CN107783442B (en) | 2019-12-17 |
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