CN207008770U - Intelligent card data acquisition terminal, keyboard scanning system - Google Patents
Intelligent card data acquisition terminal, keyboard scanning system Download PDFInfo
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- CN207008770U CN207008770U CN201720803426.XU CN201720803426U CN207008770U CN 207008770 U CN207008770 U CN 207008770U CN 201720803426 U CN201720803426 U CN 201720803426U CN 207008770 U CN207008770 U CN 207008770U
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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 the button detection signal for representing that respective keys are pressed is detected on certain input port, then after predetermined delay duration is postponed, judge whether the button detection signal on the input port changes, if the 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
It the utility model is related 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.Due to non-contact IC card have swift to operate, strong interference immunity, operating distance it is remote, it is 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.Found in use, 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 and does not have actuation of keys when swiping the card, and microcontroller has but detected the problem of button instantaneously turns on.
Utility model content
On the one hand the application provides a kind of intelligent card data acquisition terminal, including
Swipe the card circuit, for reading the smart card information of outside；
Microprocessor, for handling the smart card information, and the intelligent card data acquisition terminal is controlled to transport
Make；
Communication module, it is connected, is used for and external device communication with the microprocessor；
Matrix keyboard, including multiple row output lines, multiple row input lines and located at the multiple row output line and more
Some buttons at least part crosspoint of individual row input line, each button include 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, represent respective keys quilt if being detected on certain input port
The button detection signal pressed, then after predetermined delay duration is postponed, judge whether is button detection signal on the input port
Change, if the button detection signal is constant, the respective keys are pressed, described if the 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 more
Some buttons at least part crosspoint of individual row input line, each button include 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 has 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, represent respective keys quilt if being detected on certain input port
The button detection signal pressed, then after predetermined delay duration is postponed, judge whether is button detection signal on the input port
Change, if the button detection signal is constant, the respective keys are pressed, described if the 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.
In the application, by setting the delay duration, high-frequency interferencing signal can be filtered out, avoids button from misleading, improved
The reliability of equipment.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, the utility model embodiment will be retouched below
The required accompanying drawing used is briefly described in stating, it should be apparent that, drawings in the following description are only the utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with root
Other accompanying drawings are obtained according to these 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
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise " are based on orientation shown in the drawings or position relationship, merely to just
In description the utility model and simplified description, rather than indicate or imply that signified device or element must be with specifically square
Position, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features
The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
The utility model 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 and the microprocessor is connected to and external device communication
Module communication 22 and keyboard scanning system 24.
With reference to figure 2, keyboard scanning system 24 includes matrix keyboard 38 and key scanning circuit 40.Matrix keyboard 38 wraps
Include multiple row output lines, multiple row input lines and handed over located at least part of the multiple row output line and multiple row input lines
Some buttons on crunode, each button include two contacts and tactile bridge, 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 connect 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
Detection signal, then after predetermined delay duration is postponed, judge whether the button detection signal on the input port changes, if described
Button detection signal 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 non-contact 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, the LPC2138 of NXP companies can be selected in microprocessor 20.
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 exports 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 includes two contacts and tactile bridge, when the tactile bridge is pressed with described two contacts and both are turned on, unclamp
When touch bridge reset disconnect two contacts connection.Two contacts of the button connect corresponding row output line respectively and row input
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
It must be in that systematicness arranges to limit each button.
Key scanning circuit 40 includes controller, and controller has multiple input ports and multiple output ports, described more
Individual output port connects the multiple row input line correspondingly, and the multiple input port connects described more correspondingly
Individual row output line.
By taking the keyboard scanning system in Fig. 2 as an example, controller P1 mouths 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 to press without key in keyboard.
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 the button detection signal is constant, the respective keys are pressed, if the button detects
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.Preferably, 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, avoids swiping the card and draws
The button risen instantaneously misleads, and improves the reliability of equipment.
Preferably, intelligent card data acquisition terminal 16 also includes power module 30, clock system 32, storage circuit 34, aobvious
Display screen 36 and state indicator module 44 (such as including buzzer, some LED lights etc.).
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 or example of the present utility model.At this
In specification, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, description is specific
Feature, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Above content is to combine specific embodiment further detailed description of the utility model, it is impossible to is assert
Specific implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, some simple deduction or replace can also be made.
Claims (8)
1. a kind of intelligent card data acquisition terminal, including：
Swipe the card circuit, for reading the smart card information of outside；
Microprocessor, for handling the smart card information, and the intelligent card data acquisition terminal is controlled to operate；
Communication module, it is connected, is used for and external device communication with the microprocessor；
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 include 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 connect 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, represents that respective keys are pressed if being detected on certain input port
Button detection signal, then after predetermined delay duration is postponed, judge whether the button detection signal on the input port changes,
If the button detection signal is constant, the respective keys are pressed, described accordingly to press if the 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 include 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 has 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, represents that respective keys are pressed if being detected on certain input port
Button detection signal, then after predetermined delay duration is postponed, judge whether the button detection signal on the input port changes,
If the button detection signal is constant, the respective keys are pressed, described accordingly to press if the 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720803426.XU CN207008770U (en) | 2017-07-03 | 2017-07-03 | Intelligent card data acquisition terminal, keyboard scanning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720803426.XU CN207008770U (en) | 2017-07-03 | 2017-07-03 | Intelligent card data acquisition terminal, keyboard scanning system |
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| CN207008770U true CN207008770U (en) | 2018-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301726A (en) * | 2017-07-03 | 2017-10-27 | 惠州市天泽盈丰物联网科技股份有限公司 | 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 |
|---|---|---|---|---|
| CN107301726A (en) * | 2017-07-03 | 2017-10-27 | 惠州市天泽盈丰物联网科技股份有限公司 | Intelligent card data acquisition terminal, keyboard scanning system and method |
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