CN204104023U - Based on the quick supervisory keyboard of DVR - Google Patents
Based on the quick supervisory keyboard of DVR Download PDFInfo
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- CN204104023U CN204104023U CN201420509353.XU CN201420509353U CN204104023U CN 204104023 U CN204104023 U CN 204104023U CN 201420509353 U CN201420509353 U CN 201420509353U CN 204104023 U CN204104023 U CN 204104023U
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Abstract
Based on a quick supervisory keyboard for DVR, be characterized in, comprise: single-chip microcomputer is electrically connected with keyboard LED drive chip, RS485 communication interface circuit respectively, and keyboard LED drive chip is electrically connected with keyboard scanning circuit, LED drive circuit.Single-chip microcomputer reads the button data of the keyboard scanning circuit that keyboard LED drive chip obtains, data after process are sent to keyboard LED drive chip, shown by keyboard LED drive chip driving LED drive circuit, and data are sent to RS485 communication interface circuit simultaneously transfer of data and mutual is carried out to its DVR be connected.Only need press a key and can complete operation needed for DVR, without the need to pressing some button successively, its circuit connection structure is simple, dependable performance, intuitive display is accurate, makes DVR operating personnel have distinguishing rule, quick realization needs function, reduces working strength.
Description
Technical field
It is a kind of quick supervisory keyboard based on DVR that the utility model relates to, and pushes button and performs corresponding function, be applied in the occasion of frequent operation DVR.
Background technology
Video monitoring, be the product being widely used in industry-by-industry, wherein DVR is as core memory and video processing equipment, and operator is more frequent to the operation of DVR.Along with universalness and hugeization of video monitoring system, the limitation of the artificial monitoring of tradition is more and more outstanding, operating personnel need to carry out frequent operation to DVR, especially some special places, as mine industry, railway systems, chemical industry etc., need operating personnel frequently switch and operate DVR, will workload be increased like this, occur the situations such as operate miss.The keyboard of current DVR is universal keyboard, completes an a lot of step of action need, cannot fast complete by a key.
For these reasons, being badly in need of a kind of device can solve DVR frequent operation problem by a key, and operator only need can complete multi-mode operation by one-touch, convenient and swift, increases work efficiency.
Summary of the invention
The purpose of this utility model is, overcome the deficiencies in the prior art, a kind of quick supervisory keyboard based on DVR is provided, uses this quick supervisory keyboard only need press a key and can complete operation needed for DVR, without the need to pressing some button successively, its circuit connection structure is simple, dependable performance, intuitive display is accurate, makes DVR operating personnel have distinguishing rule, quick realization needs function, reduces working strength.
The purpose of this utility model is realized by following technical scheme: a kind of quick supervisory keyboard based on DVR, it is characterized in that: it comprise single-chip microcomputer respectively with keyboard LED drive chip, RS485 communication interface circuit is electrically connected, keyboard LED drive chip and keyboard scanning circuit, LED drive circuit is electrically connected, single-chip microcomputer reads the keyboard scanning circuit button data that keyboard LED drive chip obtains, data after process are sent to keyboard LED drive chip, shown by keyboard LED drive chip driving LED drive circuit, and data are sent to RS485 communication interface circuit simultaneously transfer of data and mutual is carried out to its DVR be connected.
The model of described single-chip microcomputer U2 is U101, C8051F500 single-chip microcomputer.
The model of described keyboard LED drive chip U1 is the keyboard LED drive chip of CH455.
Described keyboard scanning circuit comprises: current-limiting resistance R11, R12, R13, R14 and 28 button electrical connections.
Described LED drive circuit comprises: current-limiting resistance R2, light-emitting diode D1, D2, D3, D4 and charactron electrical connection.
Quick supervisory keyboard based on DVR of the present utility model is that a kind of user can define shortcut, operate the keyboard of some function, due to single-chip microcomputer respectively with keyboard LED drive chip, RS485 communication interface circuit is electrically connected, keyboard LED drive chip and keyboard scanning circuit, LED drive circuit is electrically connected, single-chip microcomputer can read the keyboard scanning circuit button data that keyboard LED drive chip obtains, data after process are sent to keyboard LED drive chip, shown by keyboard LED drive chip driving LED drive circuit, and data are sent to RS485 communication interface circuit simultaneously transfer of data and mutual is carried out to its DVR be connected.Only need press a key and can complete operation needed for DVR, without the need to pressing some button successively, its circuit connection structure is simple, dependable performance, intuitive display is accurate, makes DVR operating personnel have distinguishing rule, the quick function realizing needing, reduces working strength.
Accompanying drawing explanation
Fig. 1 is the quick supervisory keyboard circuit block diagram based on DVR;
Fig. 2 is the quick supervisory keyboard circuit theory diagrams based on DVR;
Fig. 3 is the quick supervisory keyboard program flow diagram based on DVR.
In figure: 1 single-chip microcomputer, 2 keyboard LED drive chip, 3LED drive circuit, 4 keyboard scanning circuits, 5RS485 communication interface circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is explained in detail.
With reference to Fig. 1, the quick supervisory keyboard based on DVR of the present utility model, comprising: single-chip microcomputer 1 is electrically connected with keyboard LED drive chip 2, RS485 communication interface circuit 5 respectively.Keyboard LED drive chip 2 is electrically connected with keyboard scanning circuit 4, LED drive circuit 3.Single-chip microcomputer 1 reads the button data of the keyboard scanning circuit 4 that keyboard LED drive chip 2 obtains, data after process are sent to keyboard LED drive chip 2, shown by keyboard LED drive chip 2 driving LED drive circuit 3, and data are sent to RS485 communication interface circuit 5 simultaneously transfer of data and mutual is carried out to its DVR be connected.
See figures.1.and.2, the quick supervisory keyboard based on DVR of the present utility model, the i.e. U1 of described keyboard LED drive chip 2, employing model is the keyboard LED drive chip of CH455.Described keyboard scanning circuit 4 comprises: current-limiting resistance R11, R12, R13, R14 and 28 buttons.Described LED drive circuit 3 comprises: current-limiting resistance R2, light-emitting diode D1, D2, D3, D4 and charactron.
Quick supervisory keyboard electronic devices and components used based on DVR of the present utility model are commercially available prod, wherein: single-chip microcomputer 1 i.e. U2 is U101, are the C8051F500 single-chip microcomputers that Silicon Labs company of the U.S. produces; Keyboard LED drive chip 2 i.e. U1 is the CH455 family chip that Nanjing of China Qin Heng company produces.
The following describes the course of work of the quick supervisory keyboard based on DVR of the present utility model:
With reference to Fig. 2, the utility model is based on the quick supervisory keyboard of DVR, single-chip microcomputer 1 reads the button data of the keyboard scanning circuit 4 that keyboard LED drive chip 2 obtains, data after process are sent to the keyboard LED drive chip 2 that model is CH455, model is charactron and the driving of light-emitting diode D1, D2, D3, D4 employing dynamic scan of keyboard LED drive chip 2 pairs of LED drive circuits 3 of CH455, order is DIG0 to DIG3, when one of them pin sucks electric current, other pin does not then suck electric current.CH455 inside has current drive, can the common cathode charactron of Direct driver 0.5 inch to 1 inch, section drives the section G ~ section A of the corresponding charactron of pin SEG6 ~ SEG0 difference, section drives the decimal point of the corresponding charactron of pin SEG7, and word drive pin DIG3 ~ DIG0 connects the negative electrode of 4 charactrons respectively; CH455 also can connect Light-Emitting Diode LED array or 32 individual light-emitting diodes of 8 × 4 matrixes, or supports common anode charactron by external rp-drive, or external high power valve supports large-sized charactron.Under 7 stage modes, SEG7 pin is used to keyboard interrupt and exports, and cannot drive the decimal point of charactron again.The display driver time distributing to each charactron is further subdivided into 8 equal portions by CH455, supports 8 grades of brilliance controls by set and display duty ratio.The value of duty ratio is from 1/8 to 8/8, and duty ratio is larger, and the average driving current of charactron is larger, and display brightness is also higher, but is non-linear relation between duty ratio and display brightness.
CH455 inside has the data register of 48, for preserving 4 digital data, corresponding respectively to 4 charactrons or 4 groups of light-emitting diodes that CH455 drives, often organizing 8 light-emitting diodes.In data register, decimal point and the section G ~ section A of each charactron corresponding is distinguished in the 7 ~ position, position 0 of digital data, for light emitting diode matrix, then and the data bit of an each digital data corresponding Light-Emitting Diode uniquely.When data bit is 1, section or the light-emitting diode of corresponding charactron will be lighted; When data bit is 0, then section or the light-emitting diode of corresponding charactron will extinguish.Such as, the position 0 of the 3rd data register is 1, so the section A of the 3rd of correspondence the charactron lights.
Keyboard scanning circuit 4 comprises 7 tunnel line scanning SEG0, SEG1, SEG2, SEG3, SEG4, SEG5, SEG6,4 tunnel column scan DIG0, DIG1, DIG2, DIG3 and current-limiting resistance R11, R12, R13, R14.The keyboard scan function of CH455 supports 28 key boards of 7 × 4 matrixes.During keyboard scan, DIG3 ~ DIG0 pin is used for column scan and exports, and SEG6 ~ SEG0 pin, all with inner pull down resistor, inputs for line scanning.CH455 regularly inserts keyboard scan in display driver scanning process.During keyboard scan, DIG3 ~ DIG0 pin exports high level successively according to the order of DIG0 to DIG3, all the other pin output low levels; The output of SEG6 ~ SEG0 pin is prohibited, when not having key to be pressed, SEG6 ~ SEG0 all by drop-down be low level; When there being key to be pressed, the key such as connecting DIG1 and SEG4 is pressed, then when DIG1 exports high level, SEG4 detects high level; In order to prevent from producing error code because of key jitter or external interference, CH455 carries out twice sweep, only has when the coming to the same thing of twice keyboard scan, just button can be identified effectively.If CH455 detects effective button, then record this key code, and produce the keyboard interrupt of Low level effective by INT# pin, now single-chip microcomputer can read key code by serial line interface; Before new effective button not detected, CH455 no longer produces any keyboard interrupt.CH455 does not support Macintosh, and that is, synchronization, can not have the key of two or more to be pressed; If multiple key is pressed simultaneously, the button that so key code is less is preferential.
With reference to Fig. 3, software program of the present utility model according to Automated condtrol, computer processing technology establishment, be those skilled in the art the technology be familiar with.
Each button of existing common keyboard is single function, some function of DVR is used to need once to press these single buttons, as: as entered No. 13 video pictures, need once to press 1 button, then press 3 buttons, so just can complete and enter No. 13 pictures, in time entering other pictures as many pictures, more loaded down with trivial details, need repeatedly to press " many frames button ", 16 pictures cannot be entered by a key.
And of the present utility model based on DVR prompt operation keyboard, provide more buttons to define complex operations.These buttons are defined as the combination of some function, press this button, this function of can going directly.As pressed " 13 " button, can directly enter 13 pictures, not pressing " 1 " button successively at needs, then press " 3 " button.When pressing many pictures " 16 picture " button, directly jump to 16 pictures.No longer need repeatedly to press " many pictures " button.Of the present utility modelly fast can complete specific function based on DVR prompt operation keyboard, greatly reduce operating personnel's number of operations, increase work efficiency.
Existing common key-press and of the present utility modelly to contrast based on the quick keyboard operation of DVR:
On probation, respond well through 2 years of the model machine of the quick supervisory keyboard based on DVR of the present utility model, achieves the purpose of this utility model and reaches described effect.
Claims (5)
1. the quick supervisory keyboard based on DVR, it is characterized in that: it comprise single-chip microcomputer respectively with keyboard LED drive chip, RS485 communication interface circuit is electrically connected, keyboard LED drive chip and keyboard scanning circuit, LED drive circuit is electrically connected, single-chip microcomputer reads the keyboard scanning circuit button data that keyboard LED drive chip obtains, data after process are sent to keyboard LED drive chip, shown by keyboard LED drive chip driving LED drive circuit, and data are sent to RS485 communication interface circuit simultaneously transfer of data and mutual is carried out to its DVR be connected.
2. the quick supervisory keyboard based on DVR according to claim 1, is characterized in that: the model of described single-chip microcomputer U2 is U101, C8051F500 single-chip microcomputer.
3. the quick supervisory keyboard based on DVR according to claim 1, is characterized in that: the model of described keyboard LED drive chip U1 is the keyboard LED drive chip of CH455.
4. the quick supervisory keyboard based on DVR according to claim 1, is characterized in that: described keyboard scanning circuit comprises: current-limiting resistance R11, R12, R13, R14 and 28 button electrical connections.
5. the quick supervisory keyboard based on DVR according to claim 1, is characterized in that: described LED drive circuit comprises: current-limiting resistance R2, light-emitting diode D1, D2, D3, D4 and charactron electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509353.XU CN204104023U (en) | 2014-09-04 | 2014-09-04 | Based on the quick supervisory keyboard of DVR |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509353.XU CN204104023U (en) | 2014-09-04 | 2014-09-04 | Based on the quick supervisory keyboard of DVR |
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| Publication Number | Publication Date |
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| CN204104023U true CN204104023U (en) | 2015-01-14 |
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| CN201420509353.XU Active CN204104023U (en) | 2014-09-04 | 2014-09-04 | Based on the quick supervisory keyboard of DVR |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253942A (en) * | 2014-09-04 | 2014-12-31 | 吉林市东杰科技开发有限公司 | Hard disk video-based rapid control keyboard |
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- 2014-09-04 CN CN201420509353.XU patent/CN204104023U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253942A (en) * | 2014-09-04 | 2014-12-31 | 吉林市东杰科技开发有限公司 | Hard disk video-based rapid control keyboard |
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