CN104268967A - Safety entrance guard method and device based on capacitance-type sensor - Google Patents
Safety entrance guard method and device based on capacitance-type sensor Download PDFInfo
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- CN104268967A CN104268967A CN201410515169.0A CN201410515169A CN104268967A CN 104268967 A CN104268967 A CN 104268967A CN 201410515169 A CN201410515169 A CN 201410515169A CN 104268967 A CN104268967 A CN 104268967A
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- capacitance
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Abstract
The invention discloses a safety entrance guard method based on a capacitance-type sensor. The safety entrance guard method comprises the following steps: obtaining capacitance change amount of an electrode arranged on doors and windows; converting the obtained capacitance change amount into a digital signal and outputting the digital signal; and according to the output digital signal, obtaining an opening state of the doors and the windows. The invention further provides a safety entrance guard device based on the capacitance-type sensor. According to the safety entrance guard device based on the capacitance-type sensor, provided by the invention, by arranging a safety entrance guard manner of the capacitance-type sensor, the state that the doors and the windows are illegally invaded is obtained, and the beneficial effects of convenience in installation and long service life are achieved.
Description
Technical field
The present invention relates to safety protection field, particularly relate to the safety door inhibition method and apparatus based on capacitance type sensor.
Background technology
Along with the generally raising that the security protection of family, enterprise, office buildings is realized, resident family gets more and more to the demand of safety door inhibition.The mode of the common employing magnetic induction switch of existing safety door inhibition, namely magnetic stripe is placed in movable door or window, and magnetic induction switch is placed in fixing doorframe or window frame, touches magnetic induction switch send alerting signal when illegally opening door or window.But magnetic induction switch belongs to mechanism arrangement, the life-span of the mechanical contact of magnetic induction switch is short, therefore, how to improve the serviceable life of safety door inhibition, is a problem demanding prompt solution.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of safety door inhibition method and apparatus based on capacitance type sensor, is intended to the serviceable life of improving safety door inhibition.
For achieving the above object, a kind of safety door inhibition method based on capacitance type sensor provided by the invention, comprises the following steps:
Obtain the capacitance change of the electrode be arranged on door and window;
The capacitance change of acquisition is converted to digital signal export;
According to the digital signal of described output, obtain the on off state of door and window.
Preferably, described electrode at least comprises two sheet metals, and the step that described acquisition is arranged at the capacitance change of the electrode on door and window specifically comprises:
By obtaining the right opposite sum distance between two sheet metals, calculate the electric capacitance change of described electrode.
Preferably, the described capacitance change by acquisition is converted to the step that digital signal carries out exporting and specifically comprises:
Utilize capacitance touching control IC that the capacitance change of acquisition is converted to digital signal;
Control described digital signal by MCU and carry out wave form output.
Preferably, the step that the capacitance change of acquisition is converted to digital signal specifically comprises by the described capacitance touching control IC that utilizes:
The capacitance change of described acquisition and the reference capacitance value preset are compared, after the difference after relatively being amplified, is converted into low and high level change.
Preferably, the described digital signal according to described output, the step obtaining the on off state of door and window comprises:
If when the digital signal of described output presents high level or low and high level fluctuations, then judge that door and window is opened.
In order to solve above-mentioned technical matters, the present invention also provides a kind of safety door inhibition apparatus based on capacitance type sensor, and the described safety door inhibition apparatus based on capacitance type sensor comprises:
Acquisition module, for obtaining the capacitance change of the electrode be arranged on door and window;
Modular converter, exports for the capacitance change of acquisition is converted to digital signal;
Block of state, for the digital signal according to described output, obtains the on off state of door and window.
Preferably, described electrode at least comprises two sheet metals, described acquisition module, specifically for by the right opposite sum distance between acquisition two sheet metal, calculates the electric capacitance change of described electrode.
Preferably, described modular converter comprises:
Converting unit, is converted to digital signal for utilizing capacitance touching control IC by the capacitance change of acquisition;
Output unit, for controlling described digital signal by MCU and carrying out wave form output.
Preferably, described converting unit, specifically for the capacitance change of described acquisition and the reference capacitance value preset being compared, is converted into low and high level change after the difference after relatively being amplified.
Preferably, described block of state, if when presenting high level or low and high level fluctuations specifically for the digital signal of described output, then judge that door and window is opened.
Safety door inhibition method based on capacitance type sensor provided by the invention, by obtaining the capacitance change of the electrode be arranged on door and window; The capacitance change of acquisition is converted to digital signal export; According to the digital signal of described output, obtain the on off state of door and window.Safety door inhibition method based on capacitance type sensor provided by the invention, by arranging the safety door inhibition mode of capacitance type sensor, thus obtaining door and window by the state of illegal invasion, achieving beneficial effect that is easy for installation, long service life.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of safety door inhibition method first embodiment that the present invention is based on capacitance type sensor;
Fig. 2 is for being converted to the refinement schematic flow sheet that digital signal carries out the step exported described in Fig. 1 by the capacitance change of acquisition;
Fig. 3 is the connection line figure touching IC;
Fig. 4 is the connection line figure of MCU;
The refinement schematic flow sheet of Fig. 5 for utilizing capacitance touching control IC the capacitance change of acquisition to be converted to the step of digital signal described in Fig. 2;
Fig. 6 is the schematic flow sheet of safety door inhibition method second embodiment that the present invention is based on capacitance type sensor;
Fig. 7 is the high-level schematic functional block diagram of safety door inhibition apparatus one embodiment that the present invention is based on capacitance type sensor;
Fig. 8 is the high-level schematic functional block diagram of modular converter in Fig. 7.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of safety door inhibition method based on capacitance type sensor, with reference to Fig. 1, in one embodiment, based on the safety door inhibition method of capacitance type sensor, comprise the following steps:
Step S100, obtain the capacitance change being arranged at electrode on door and window.
Safety door inhibition apparatus based on capacitance type sensor arranges electrode on door and window, described electrode at least comprises two sheet metals, wherein the first sheet metal is positioned on movable door and window, second sheet metal to be positioned on fixing sash and to be oppositely arranged with described first sheet metal, when door and window opens or closes, electric capacity on electrode can change, based on the safety door inhibition apparatus of capacitance type sensor, according to
ε=ε
οε
γ sε dielectric permittivity, ε
0for permittivity of vacuum, ε
rfor medium relative dielectric constant, d is the distance of two-plate, S is that the right opposite of two-plate amasss, right opposite sum distance wherein between two sheet metals is the distance of the right opposite sum of two-plate, by obtaining the right opposite sum distance between two sheet metals, thus calculate corresponding capacitance, obtain the capacitance change of the electrode be arranged on door and window.
Step S200, the capacitance change of acquisition is converted to digital signal exports.
Based on the digital signal that the capacitance change of acquisition is converted to by the safety door inhibition apparatus of capacitance type sensor, be stored in register, and the digital signal after conversion is exported.
Step S300, digital signal according to described output, obtain the on off state of door and window.
Based on the safety door inhibition apparatus of capacitance type sensor according to the digital signal exported, thus obtain the on off state of door and window, being closed condition when presenting low level, is open mode when presenting high level or low and high level fluctuations.
The safety door inhibition method based on capacitance type sensor that the present embodiment provides, by arranging the safety door inhibition mode of capacitance type sensor, thus obtaining door and window by the state of illegal invasion, achieving beneficial effect that is easy for installation, long service life.
With further reference to Fig. 2, the safety door inhibition method based on capacitance type sensor that the present embodiment provides, step S200 specifically comprises:
Step S210, utilize touch-control IC that the capacitance change of acquisition is converted to digital signal.
Safety door inhibition apparatus based on capacitance type sensor utilizes touch-control IC that the capacitance change of acquisition is converted to digital signal, as shown in Figure 3, the model of touch-control IC is APT6012, APT6012 provides multiple touch-control pin, only one of them of the first sheet metal of electrode and APT6012 many touch-control pins need be connected, second sheet metal is connected with the ground of APT6012, safety door inhibition apparatus based on capacitance type sensor passes through the variable quantity of the two metal sheets acquisition electric capacity of electrode, and via touch-control IC APT6012, the variable quantity of electric capacity is converted to digital signal.
Step S220, control described digital signal by MCU and carry out wave form output.
Control described digital signal based on the safety door inhibition apparatus of capacitance type sensor by MCU and carry out wave form output, as shown in Figure 4, described MCU model is single-chip microcomputer LPC1114, data pin SDA, Clock Signal pin SCL, the look-at-me pin INT of single-chip microcomputer LPC1114 are connected with the corresponding pin of touch-control IC respectively, pass through MCU, after the digital signal transmitted touch-control IC controls and converts, carry out wave form output.
With further reference to Fig. 5, the safety door inhibition method based on capacitance type sensor that the present embodiment provides, step S210 specifically comprises:
Step S210A, the capacitance change of described acquisition and the reference capacitance value preset to be compared, after the difference after relatively being amplified, be converted into low and high level change.
The capacitance change of acquisition and the reference capacitance value preset compare by the safety door inhibition apparatus based on capacitance type sensor, and are amplified by the signal of two capacitive differential after relatively, are converted into the change of corresponding low and high level.If when the difference change of electric capacity is less, corresponding display low level, when the difference of electric capacity is larger, correspondence is shown as high level, and user only needs the on off state can knowing door and window from the situation of change of low and high level.
The safety door inhibition method based on capacitance type sensor that the present embodiment provides, utilize the combination of touch-control IC and MCU, by quick obtaining capacitance change, and capacitance change is converted to the change of corresponding low and high level, thus obtain the folding condition of door and window, facilitate in real time.
Be the schematic flow sheet of safety door inhibition method second embodiment that the present invention is based on capacitance type sensor with further reference to Fig. 6, Fig. 6, on the basis of the first embodiment, described step S300 specifically comprises:
If when the digital signal of the described output of step S300A presents high level or low and high level fluctuations, then judge that door and window is opened.
Safety door inhibition apparatus based on capacitance type sensor just can obtain the folding condition of door and window from the digital signal exported, if when the digital signal of described output presents high level or low and high level fluctuations, then judges that door and window is opened, by illegal invasion; If when the digital signal of described output presents low level change, then illustrate that door and window is closed, not by illegal invasion.
The safety door inhibition method based on capacitance type sensor that the present embodiment provides, utilizes the digital signal exported just can obtain the folding condition of door and window, thus overcomes mechanical hook-up life-span short defect, and easy for installation.
It is the high-level schematic functional block diagram of safety door inhibition apparatus one embodiment that the present invention is based on capacitance type sensor with further reference to Fig. 7, Fig. 7; In one embodiment, the described safety door inhibition apparatus based on capacitance type sensor comprises:
Acquisition module 10, for obtaining the capacitance change of the electrode be arranged on door and window;
Modular converter 20, exports for the capacitance change of acquisition is converted to digital signal;
Block of state 30, for the digital signal according to described output, obtains the on off state of door and window.
Acquisition module 10 based on the safety door inhibition apparatus of capacitance type sensor arranges electrode on door and window, described electrode at least comprises two sheet metals, wherein the first sheet metal is positioned on movable door and window, second sheet metal to be positioned on fixing sash and to be oppositely arranged with described first sheet metal, when door and window opens or closes, electric capacity on electrode can change, based on the safety door inhibition apparatus of capacitance type sensor, according to
ε=ε
οε
γ sε dielectric permittivity, ε
0for permittivity of vacuum, ε
rfor medium relative dielectric constant, d is the distance of two-plate, S is that the right opposite of two-plate amasss, right opposite sum distance wherein between two sheet metals is the distance of the right opposite sum of two-plate, by obtaining the right opposite sum distance between two sheet metals, thus calculate corresponding capacitance, obtain the capacitance change of the electrode be arranged on door and window.
Based on the digital signal that the capacitance change of acquisition is converted to by the modular converter 20 of the safety door inhibition apparatus of capacitance type sensor, be stored in register, and the digital signal after conversion is exported.
Based on the block of state 30 of the safety door inhibition apparatus of capacitance type sensor according to the digital signal exported, thus obtain the on off state of door and window, being closed condition when presenting low level, is open mode when presenting high level or low and high level fluctuations.
The safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, by arranging the safety door inhibition mode of capacitance type sensor, thus obtaining door and window by the state of illegal invasion, achieving beneficial effect that is easy for installation, long service life.
With further reference to Fig. 8, the safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, described modular converter comprises:
Converting unit 21, is converted to digital signal for utilizing capacitance touching control IC by the capacitance change of acquisition;
Output unit 22, for controlling described digital signal by MCU and carrying out wave form output.
Converting unit 21 based on the safety door inhibition apparatus of capacitance type sensor utilizes touch-control IC that the capacitance change of acquisition is converted to digital signal, as shown in Figure 3, the model of touch-control IC is APT6012, APT6012 provides multiple touch-control pin, only one of them of the first sheet metal of electrode and APT6012 many touch-control pins need be connected, second sheet metal is connected with the ground of APT6012, safety door inhibition apparatus based on capacitance type sensor passes through the variable quantity of the two metal sheets acquisition electric capacity of electrode, and via touch-control IC APT6012, the variable quantity of electric capacity is converted to digital signal.
Control described digital signal based on the output unit 22 of the safety door inhibition apparatus of capacitance type sensor by MCU and carry out wave form output, as shown in Figure 4, described MCU model is single-chip microcomputer LPC1114, data pin SDA, Clock Signal pin SCL, the look-at-me pin INT of single-chip microcomputer LPC1114 are connected with the corresponding pin of touch-control IC respectively, pass through MCU, after the digital signal transmitted touch-control IC controls and converts, carry out wave form output.
With further reference to Fig. 8, the safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, described converting unit 21, specifically for the capacitance change of described acquisition and the reference capacitance value preset being compared, is converted into low and high level change after the difference after relatively being amplified.
The capacitance change of acquisition and the reference capacitance value preset compare by the converting unit 21 based on the safety door inhibition apparatus of capacitance type sensor, and are amplified by the signal of two capacitive differential after relatively, are converted into the change of corresponding low and high level.If when the difference change of electric capacity is less, corresponding display low level, when the difference of electric capacity is larger, correspondence is shown as high level, and user only needs the on off state can knowing door and window from the situation of change of low and high level.
The safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, utilize the combination of touch-control IC and MCU, by quick obtaining capacitance change, and capacitance change is converted to the change of corresponding low and high level, thus obtain the folding condition of door and window, facilitate in real time.
With further reference to Fig. 7, the safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, described block of state 30, if when presenting high level or low and high level fluctuations specifically for the digital signal of described output, then judge that door and window is opened.
Block of state 30 based on the safety door inhibition apparatus of capacitance type sensor just can obtain the folding condition of door and window from the digital signal exported, if when the digital signal of described output presents high level or low and high level fluctuations, then judge that door and window is opened, by illegal invasion; If when the digital signal of described output presents low level change, then illustrate that door and window is closed, not by illegal invasion.
The safety door inhibition apparatus based on capacitance type sensor that the present embodiment provides, utilizes the digital signal exported just can obtain the folding state of door and window, thus overcomes mechanical hook-up life-span short defect, and easy for installation.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1., based on a safety door inhibition method for capacitance type sensor, it is characterized in that, comprise the following steps:
Obtain the capacitance change of the electrode be arranged on door and window;
The capacitance change of acquisition is converted to digital signal export;
According to the digital signal of described output, obtain the on off state of door and window.
2., as claimed in claim 1 based on the safety door inhibition method of capacitance type sensor, it is characterized in that, described electrode at least comprises two sheet metals, and the step that described acquisition is arranged at the capacitance change of the electrode on door and window specifically comprises:
By obtaining the right opposite sum distance between two sheet metals, calculate the electric capacitance change of described electrode.
3. as claimed in claim 1 or 2 based on the safety door inhibition method of capacitance type sensor, it is characterized in that, the described capacitance change by acquisition is converted to the step that digital signal carries out exporting and specifically comprises:
Utilize touch-control IC that the capacitance change of acquisition is converted to digital signal;
Control described digital signal by MCU and carry out wave form output.
4., as claimed in claim 3 based on the safety door inhibition method of capacitance type sensor, it is characterized in that, the step that the capacitance change of acquisition is converted to digital signal specifically comprises by the described capacitance touching control IC that utilizes:
The capacitance change of described acquisition and the reference capacitance value preset are compared, after the difference after relatively being amplified, is converted into low and high level change.
5. as claimed in claim 4 based on the safety door inhibition method of capacitance type sensor, it is characterized in that, the described digital signal according to described output, the step obtaining the on off state of door and window comprises:
If when the digital signal of described output presents high level or low and high level fluctuations, then judge that door and window is opened.
6. based on a safety door inhibition apparatus for capacitance type sensor, it is characterized in that, the described safety door inhibition apparatus based on capacitance type sensor comprises:
Acquisition module, for obtaining the capacitance change of the electrode be arranged on door and window;
Modular converter, exports for the capacitance change of acquisition is converted to digital signal;
Block of state, for the digital signal according to described output, obtains the on off state of door and window.
7. as claimed in claim 1 based on the safety door inhibition apparatus of capacitance type sensor, it is characterized in that, described electrode at least comprises two sheet metals, described acquisition module, specifically for by the right opposite sum distance between acquisition two sheet metal, calculate the electric capacitance change of described electrode.
8. the safety door inhibition apparatus based on capacitance type sensor as claimed in claims 6 or 7, it is characterized in that, described modular converter comprises:
Converting unit, is converted to digital signal for utilizing capacitance touching control IC by the capacitance change of acquisition;
Output unit, for controlling described digital signal by MCU and carrying out wave form output.
9., as claimed in claim 8 based on the safety door inhibition apparatus of capacitance type sensor, it is characterized in that,
Described converting unit, specifically for the capacitance change of described acquisition and the reference capacitance value preset being compared, is converted into low and high level change after the difference after relatively being amplified.
10. as claimed in claim 9 based on the safety door inhibition apparatus of capacitance type sensor, it is characterized in that, described block of state, if when presenting high level or low and high level fluctuations specifically for the digital signal of described output, then judge that door and window is opened.
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| CN201410515169.0A CN104268967A (en) | 2014-09-29 | 2014-09-29 | Safety entrance guard method and device based on capacitance-type sensor |
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Cited By (2)
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| CN105069934A (en) * | 2015-03-31 | 2015-11-18 | 浙江师范大学 | Simple doorbell |
| CN105938632A (en) * | 2015-12-17 | 2016-09-14 | 天津市云图汇展科技有限公司 | Security platform for exhibition |
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Application publication date: 20150107 |