CN107301726A - Intelligent card data acquisition terminal, keyboard scanning system and method - Google Patents
Intelligent card data acquisition terminal, keyboard scanning system and method Download PDFInfo
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- CN107301726A CN107301726A CN201710534290.1A CN201710534290A CN107301726A CN 107301726 A CN107301726 A CN 107301726A CN 201710534290 A CN201710534290 A CN 201710534290A CN 107301726 A CN107301726 A CN 107301726A
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- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011889 copper foil Substances 0.000 claims description 5
- 238000010408 sweeping Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/0873—Details of the card reader
- G07F7/0893—Details of the card reader the card reader reading the card in a contactless manner
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
Disclosure intelligent card data acquisition terminal, keyboard scanning system and method.The system includes matrix keyboard and key scanning circuit.Key scanning circuit includes controller.Controller has multiple input ports and multiple output ports.Multiple row input lines of multiple output ports connection matrix formula keyboard correspondingly, multiple row output lines of multiple input ports connection matrix formula keyboard correspondingly.Controller is configured as making multiple output ports be sequentially output predetermined keyboard scanning signal, and the button detection signal on the multiple input ports of detection, if detecting the button detection signal for representing that respective keys are pressed on certain input port, then after predetermined delay duration is postponed, judge whether the detection signal of the button on the input port changes, if button detection signal is constant, the respective keys are pressed, if the button detection signal changes, the respective keys are not pressed.
Description
Technical field
The present invention relates to key scan technology.
Background technology
Non-contact Intelligent IC Card is an emerging technology in IC-card field, and it is REID and IC-card technology phase
With reference to product.Because non-contact IC card has, swift to operate, strong interference immunity, operating distance are remote, safe, be easy to
The features such as " one card for multiple uses ", there are wide market prospects in fields such as automatic charging, identification and stored value cards.
A kind of existing non-contact data acquisition terminal includes microcontroller, keyboard, key scanning circuit, electricity of swiping the card
Road, aerial coil etc..The situation that button in key scanning circuit detection keyboard is pressed.In use find, due to button with
Aerial coil is closer to, and two contact distance very littles of button, and the electromagnetic field of aerial coil may miss two contacts of button
Conducting, causes to appear in when swiping the card not actuation of keys, and microcontroller has but detected the problem of button is instantaneously turned on.
The content of the invention
On the one hand the application provides a kind of intelligent card data acquisition terminal, including
Swipe the card circuit, the smart card information for reading outside；
Microprocessor, for handling the smart card information, and controls the intelligent card data acquisition terminal to transport
Make；
Communication module, is connected with the microprocessor, is used for and external device communication；
Matrix keyboard, including multiple row output lines, multiple row input lines and located at the multiple row output line and many
Some buttons at least part crosspoint of individual row input line, each button includes two contacts and tactile bridge, the tactile bridge quilt
Both are turned on described two contacts when pressing, two contacts of the button connect corresponding row output line respectively
With row input line；And
The key scanning circuit being connected with the microprocessor, including controller, the controller have multiple inputs
Mouth and multiple output ports, the multiple output port connect the multiple row input line, the multiple input correspondingly
Port connects the multiple row output line correspondingly；
Wherein, the controller is configured as making the multiple output port be sequentially output predetermined keyboard scanning signal,
And the button detection signal on the multiple input port of detection, if detecting expression respective keys quilt on certain input port
The button detection signal pressed, then after predetermined delay duration is postponed, judge whether the button on the input port detects signal
Change, if button detection signal is constant, the respective keys are pressed, it is described if button detection signal changes
Respective keys are not pressed.
Preferably, the terminal also includes the aerial coil coupled with the circuit of swiping the card.
Preferably, the button is conductive rubber formula button, the tactile bridge of the button is made up of conductive rubber.
Preferably, two contacts of the button are the arc copper foil being staggered.
Preferably, the predetermined delay duration is less than the sweep spacing duration between adjacent keyboard scanning signal.
Preferably, the predetermined delay duration is less than 1/10th of the sweep spacing duration.
On the other hand the application provides a kind of keyboard scanning system, including:
Matrix keyboard, including multiple row output lines, multiple row input lines and located at the multiple row output line and many
Some buttons at least part crosspoint of individual row input line, each button includes two contacts and tactile bridge, the tactile bridge quilt
Both are turned on described two contacts when pressing, two contacts of the button connect corresponding row output line respectively
With row input line；And
Key scanning circuit, including controller, the controller have multiple input ports and multiple output ports, described
Multiple output ports connect the multiple row input line correspondingly, and the multiple input port connects described correspondingly
Multiple row output lines；
Wherein, the controller is configured as making the multiple output port be sequentially output predetermined keyboard scanning signal,
And the button detection signal on the multiple input port of detection, if detecting expression respective keys quilt on certain input port
The button detection signal pressed, then after predetermined delay duration is postponed, judge whether the button on the input port detects signal
Change, if button detection signal is constant, the respective keys are pressed, it is described if button detection signal changes
Respective keys are not pressed.
Preferably, the button is conductive rubber formula button, the tactile bridge of the button is made up of conductive rubber, the button
Two contacts be the arc copper foil being staggered, the predetermined delay duration is less than the scanning room between adjacent keyboard scanning signal
Every 1/10th of duration.
The application another further aspect provides a kind of key scanning method, including：
Multiple output ports are made to be sequentially output predetermined keyboard scanning signal；And
The button detection signal on multiple input ports is detected, if detecting expression respective keys quilt on certain input port
The button detection signal pressed, then after predetermined delay duration is postponed, judge whether the button on the input port detects signal
Change, if button detection signal is constant, the respective keys are pressed, it is described if button detection signal changes
Respective keys are not pressed.
In the application, by setting the delay duration, high-frequency interferencing signal can be filtered out, it is to avoid button misleads, improved
The reliability of equipment.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed for description of the embodiment of the present invention
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 shows the intelligent card data acquisition terminal of the embodiment of the application one；
Fig. 2 shows the keyboard scanning system of Fig. 1 acquisition terminal；
Fig. 3 shows the intelligent card data acquisition terminal of another embodiment of the application.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are, based on orientation shown in the drawings or position relationship, to be for only for ease of
The description present invention and simplified description, rather than indicate or imply that the device or element of meaning must have specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
The present invention is described in further detail below by embodiment combination accompanying drawing.
Fig. 1 shows the intelligent card data acquisition terminal 10 of the embodiment of the application one, including：
For reading the circuit 18 of swiping the card of outside smart card information, for the smart card information to be handled and controlled
Make the microprocessor 20 of the intelligent card data acquisition terminal running, be connected to and external device communication with the microprocessor
Module communication 22 and keyboard scanning system 24.
With reference to Fig. 2, keyboard scanning system 24 includes matrix keyboard 38 and key scanning circuit 40.Matrix keyboard 38 is wrapped
Multiple row output lines, multiple row input lines and at least part located at the multiple row output line and multiple row input lines is included to hand over
Some buttons on crunode, each button includes two contacts and tactile bridge, is connect when the tactile bridge is pressed with described two contacts
Touch and turn on both, two contacts of the button connect corresponding row output line and row input line respectively.Key scan electricity
Road 40 includes the controller being connected with microprocessor.Controller has multiple input port P1.4~P1.7 and multiple output ports
P1.0~P1.3, the multiple output port connects the multiple row input line, the multiple input port one correspondingly
One correspondingly connected the multiple row output line.
Controller is configured as making the multiple output port be sequentially output predetermined keyboard scanning signal, and detection institute
The button detection signal on multiple input ports is stated, if detecting the button for representing that respective keys are pressed on certain input port
Signal is detected, then after predetermined delay duration is postponed, judges whether the detection signal of the button on the input port changes, if described
Button detection signal it is constant, then the respective keys are pressed, if the button detection signal change, the respective keys not by
Press.
Refering to Fig. 3, the intelligent card data acquisition terminal of another embodiment of the application includes swipe the card circuit 18, microprocessor
20th, communication module 22, the matrix keyboard 38 on keypad, key scanning circuit 40 and the day coupled with circuit 18 of swiping the card
Line coil 42.
Circuit 18 of swiping the card is used for the smart card information for reading outside.Preferably, described smart card can be NXP S50
Card, meets ISO14443 standards.Circuit 18 of swiping the card can use the general noncontact Card Reader movements of FM1702 of Microtronic A/S of Fudan University
Piece.
Microprocessor 20 is used to handle the smart card information, and controls the intelligent card data acquisition terminal 16
Running.Preferably, microprocessor 20 can select the LPC2138 of NXP companies.
Communication module 22 is responsible for and external device communication.
Matrix keyboard 38 and aerial coil 42 are located on same circuit board.Matrix keyboard 38 is exported including multiple rows
Line, multiple row input lines and some buttons on the crosspoint of the multiple row output line and multiple row input lines, often
Individual button include two contacts and tactile bridge, when the tactile bridge is pressed with described two contacts and both are turned on, release
When touch bridge reset disconnect two contacts connection.Two contacts of the button connect corresponding row output line respectively and row are inputted
Line.Preferably, button is conductive rubber formula button, the tactile bridge of button is made up of conductive rubber.Two contacts of button is staggeredly
The arc copper foil of setting.It is appreciated that described multiple row output lines and multiple column output lines are concept in logic, not
Limiting each button must be in systematicness arrangement.
Key scanning circuit 40 includes controller, and controller has multiple input ports and multiple output ports, described many
Individual output port connects the multiple row input line correspondingly, and the multiple input port connects described many correspondingly
Individual row output line.
By taking the keyboard scanning system in Fig. 2 as an example, controller P1 mouthfuls low 4 (i.e. P1.0~P1.3) can be used as output port
It is connected with row input line, high 4 (i.e. P1.4~P1.7) can be connected as input port with row output line.Make low 4 successively
Output port exports low level keyboard scanning signal, then detects the state of each row output line.Due to line and relation, work as button
When being pressed, corresponding line output line is connected with low level row input line, and the row output line understands saltus step into low level.If all rows
Output line is that high level then represents in keyboard to press without key.
In the present embodiment, the controller of key scanning circuit 40 is configured as being sequentially output multiple output ports predetermined
Button detection signal on keyboard scanning signal, and the multiple input port of detection, if being detected on certain input port
The button detection signal that respective keys are pressed is represented, then after predetermined delay duration is postponed, judges pressing on the input port
Whether key detection signal changes, if button detection signal is constant, the respective keys are pressed, if the button is detected
Signal changes, and the respective keys are not pressed.
Preferably, the predetermined delay duration is less than the sweep spacing duration between adjacent keyboard scanning signal.It is preferred that, institute
State predetermined delay duration is less than the sweep spacing duration 1/10th.In an instantiation, the predetermined delay duration
For 5ms, a length of 100ms during sweep spacing.By setting the delay duration, high-frequency interferencing signal can be filtered out, it is to avoid swipe the card and draw
The button risen instantaneously misleads, and improves the reliability of equipment.
Preferably, intelligent card data acquisition terminal 16 also include power module 30, it is clock system 32, storage circuit 34, aobvious
Display screen 36 and state indicator module 44 (such as including buzzer, some LED lights).
Clock system 32 can for example use PCF8563 clock chips, using plug-in type 32.768KHz crystal oscillators.Storage circuit
34 can use model W25X32 Flash chip, and capacity is 4M bytes, using sector erasing, be mainly used to preservation system ginseng
Number, data record, character library, and ROMPaq etc..
Display screen 36 can for example use 128*64 LCDs, can at most show 4 row Chinese characters (or letter), often row 8
Individual Chinese character or 16 letters.
In the description of this specification, reference term " embodiment ", " some embodiments ", " an implementation
The description of example ", " some embodiments ", " example ", " specific example " or " some examples " etc. means to combine the embodiment or example
Specific features, structure, material or the feature of description are contained at least one embodiment of the present invention or example.In this explanation
In book, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific spy of description
Levy, structure, material or feature can in an appropriate manner be combined in any one or more embodiments or example.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made.
Claims (10)
1. a kind of intelligent card data acquisition terminal, including：
Swipe the card circuit, the smart card information for reading outside；
Microprocessor, for handling the smart card information, and controls the intelligent card data acquisition terminal to operate；
Communication module, is connected with the microprocessor, is used for and external device communication；
Matrix keyboard, including multiple row output lines, multiple row input lines and located at the multiple row output line and multiple row
Some buttons at least part crosspoint of input line, each button includes two contacts and tactile bridge, and the tactile bridge is pressed
When both are turned on described two contacts, two contacts of the button connect corresponding row output line and row respectively
Input line；And
The key scanning circuit being connected with the microprocessor, including controller, the controller have multiple input ports and
Multiple output ports, the multiple output port connects the multiple row input line, the multiple input port correspondingly
The multiple row output line is connected correspondingly；
Wherein, the controller is configured as making the multiple output port be sequentially output predetermined keyboard scanning signal, and
The button detection signal on the multiple input port is detected, is pressed if detecting expression respective keys on certain input port
Button detection signal, then after predetermined delay duration is postponed, judge whether the detection signal of the button on the input port changes,
If the button detection signal is constant, the respective keys are pressed, described accordingly to press if button detection signal changes
Key is not pressed.
2. terminal as claimed in claim 1, wherein, the terminal also includes the aerial coil coupled with the circuit of swiping the card.
3. terminal as claimed in claim 2, wherein, the button is conductive rubber formula button, and the tactile bridge of the button is by leading
Electric rubber is made.
4. terminal as claimed in claim 3, wherein, two contacts of the button are the arc copper foil being staggered.
5. the terminal as described in any one of Claims 1-4, wherein, the predetermined delay duration is believed less than adjacent keyboard scan
Sweep spacing duration between number.
6. terminal as claimed in claim 5, wherein, the predetermined delay duration be less than the sweep spacing duration ten/
One.
7. a kind of keyboard scanning system, including:
Matrix keyboard, including multiple row output lines, multiple row input lines and located at the multiple row output line and multiple row
Some buttons at least part crosspoint of input line, each button includes two contacts and tactile bridge, and the tactile bridge is pressed
When both are turned on described two contacts, two contacts of the button connect corresponding row output line and row respectively
Input line；And
Key scanning circuit, including controller, the controller have multiple input ports and multiple output ports, the multiple
Output port connects the multiple row input line correspondingly, and the multiple input port connects the multiple correspondingly
Row output line；
Wherein, the controller is configured as making the multiple output port be sequentially output predetermined keyboard scanning signal, and
The button detection signal on the multiple input port is detected, is pressed if detecting expression respective keys on certain input port
Button detection signal, then after predetermined delay duration is postponed, judge whether the detection signal of the button on the input port changes,
If the button detection signal is constant, the respective keys are pressed, described accordingly to press if button detection signal changes
Key is not pressed.
8. system as claimed in claim 7, wherein, the button is conductive rubber formula button, and the tactile bridge of the button is by leading
Electric rubber is made, and two contacts of the button are the arc copper foil being staggered, and the predetermined delay duration is less than adjacent key
/ 10th of sweep spacing duration between disk scanning signal.
9. a kind of key scanning method, including：
Multiple output ports are made to be sequentially output predetermined keyboard scanning signal；And
The button detection signal on multiple input ports is detected, is pressed if detecting expression respective keys on certain input port
Button detection signal, then after predetermined delay duration is postponed, judge whether the detection signal of the button on the input port changes,
If the button detection signal is constant, the respective keys are pressed, described accordingly to press if button detection signal changes
Key is not pressed.
10. method as claimed in claim 9, wherein, the predetermined delay duration is less than sweeping between adjacent keyboard scanning signal
Retouch 1/10th of interval duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710534290.1A CN107301726A (en) | 2017-07-03 | 2017-07-03 | Intelligent card data acquisition terminal, keyboard scanning system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710534290.1A CN107301726A (en) | 2017-07-03 | 2017-07-03 | Intelligent card data acquisition terminal, keyboard scanning system and method |
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| Publication Number | Publication Date |
|---|---|
| CN107301726A true CN107301726A (en) | 2017-10-27 |
Family
ID=60135614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710534290.1A Pending CN107301726A (en) | 2017-07-03 | 2017-07-03 | Intelligent card data acquisition terminal, keyboard scanning system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948332A (en) * | 2021-10-29 | 2022-01-18 | 广东美的厨房电器制造有限公司 | Trigger detection circuit of key, key assembly and household appliance |
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Application publication date: 20171027 |
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| RJ01 | Rejection of invention patent application after publication |