CN102156542A

CN102156542A - Matrix keyboard for detector of positioning orientating system

Info

Publication number: CN102156542A
Application number: CN 201110006194
Authority: CN
Inventors: 徐建华; 韩勇强; 李振华; 孙寿才; 谢玲
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2011-01-13
Filing date: 2011-01-13
Publication date: 2011-08-17

Abstract

The invention discloses a matrix keyboard for a detector of a positioning orientating system, which comprises 6 special functional keys, two luminance control keys, 12 number/control keys, a confirming key, an escape key, a delete key, and a reset key, wherein the 6 special functional keys are as follows: a shift-detecting key, a north-searching key, a navigation key, a demarcating key, a binding key and a self-checking key; the 12 number/control keys are as follows: 0-9 ten number keys, a number switching num key and a symbolic key; the number keyboard can be used as a direction key when the function of number switching num key is not started; data can be inputted normally after the function of number switching num key is started; and a decoding plate is used for converting the key signal into the code which can be identified by the windows XP operation system and directly connecting to a keyboard port of the PC104 computer board. By externally connecting the matrix keyboard, the portability and the reliability of the detector are ensured, thereby ensuring the butt joint with a vehicle-loaded positioning orientating navigation system and performing the property test and fault diagnosis.

Description

Positioning and directing system detector matrix keyboard

Technical field

The present invention relates to the input equipment of a kind of positioning and directing system detector, especially be fit to the external matrix keyboard that weight and volume is subjected to the detector equipment of certain limitation, realize its all functions with the least possible button.

Background technology

Vehicular navigation system is a kind of autonomous type inertial navigation system, inertial navigation is indispensable a kind of navigation means in the modern weapons equipment, because it belongs to self-aid navigation, only depend on the output of self inertia sensitive element relative inertness reference frame, without any need for external information, be not subjected to nature or artificial interference, thereby be subjected to the favor of military service, be equipped in a large number in the various armament systems.It relies on inertial technology to realize determining self-position, and apart from the optimal route of each impact point, because the desired maneuverability of modern war, rapidity and dirigibility, its supporting input equipment also has been suggested miniaturization, functionalization, special requirement such as customizations.

As the checkout equipment of special use, require detector can both dock and carry out performance test and fault diagnosis easily with navigational system in any time and place that vehicle positioning directed navigation system needs to detect, keep in repair.Therefore detector must have characteristics such as volume is little, in light weight, low in energy consumption, reliability is high, be easy to carry, and can particularly use under the field environment in various rugged surroundings.

Input equipment as positioning and directing system detector also just requires just to have higher portability and reliability.At present, known keyboard is exactly the QWERTY keyboard on the common PC, and volume is relatively large, therefore can not finish by QWERTY keyboard the operation of detector, also can't use mouse, simultaneously in order to realize the needs of navigator fix, also require to provide several necessity navigation, seek function key such as north.

Summary of the invention

Guarantee again to realize its all functions in order to overcome the relatively large defective of traditional standard keyboard volume, the present invention proposes a kind of external matrix keyboard of special use.

The technical solution adopted for the present invention to solve the technical problems is: positioning and directing system detector matrix keyboard, adopt the operational requirements of 24 buttons realizations to the positioning and directing system fault diagnosis, and save the space, strengthened the portability of detector.It is characterized in that: adopt 24 buttons, comprise 6 special function keys such as " north, navigation, demarcation, bookbinding, self check are floated, sought in survey ", two brilliance control keys, 12 numeral/operating keys, a switch key, an acknowledgement key, an ESC Escape, a symbolic key, a delete key, a reset key; Numeric keypad can be done directionkeys and use when num key function does not start, get final product normal input data behind the num function on; Convert push button signalling to code that windows XP operating system can be discerned by the decoding plate, directly link on the keyboard port of PC104 computing machine plate.

The signal that the push button signalling of external connection keyboard must become computing machine to discern by the keyboard decoding circuit conversion before entering computing machine, the keyboard decoding circuit of detector is that the core structure forms with KB-ADP universal keyboard interface chip, it becomes QWERTY keyboard interface sequence signal with the ranks matrix coder, can directly be bound up on the keyboard interface of PC/104CPU module, application program can be treated it as QWERTY keyboard.

The invention has the beneficial effects as follows, guaranteed the portability and the reliability of detector by the external matrix keyboard, so guaranteed can be easily with vehicle positioning directed navigation system docking and carry out performance test and fault diagnosis.

Description of drawings

Fig. 1 display keyboard circuit theory diagrams;

The schematic diagram of Fig. 2 display keyboard decoding scheme;

Fig. 3 shows the outside drawing of detector.

Embodiment

Matrix keyboard is as line by 4 I/O lines among Fig. 1, article 6, the I/O line is formed as alignment, a button is set on each point of crossing of line and alignment, saves the I/O mouth, the key number in the keyboard is 4 * 6 like this, its principle of work is that line is received on the 5v power supply by pull-up resistor, no button line is in high level, has key to press, and the line level state will be by the continuous alignment level decision of line therewith, the alignment level is low, and then the line level is low; The alignment level is high, and then the line level is high.

Among Fig. 2 in QWERTY keyboard, the pairing key assignments of each key can be with a line scanning sign indicating number and the unique correspondence of column scan sign indicating number, this chip utilizes this corresponding relation exactly, user-defined button is regarded as the combination of an a certain line scanning sign indicating number L1-L8 and a column scan sign indicating number C1-C13.As " K " key on the keyboard, corresponding line scanning sign indicating number is L8, corresponding column scan sign indicating number is C13, in use, only needs L8 and C13 short circuit are got final product the state that " K " key of corresponding keyboard is pressed, use this corresponding relation, user-defined button can be changed into the key assignments of QWERTY keyboard correspondence, and this key assignments is passed to PC104, the QWERTY keyboard interface, wherein the J1 plug can link to each other with the keyboard interface of a cable with the PC104 plate, and user-defined key assignments is passed to CPU.

The essence of this keyboard is that used button in this detector is formed a keyboard, be installed on the panel of detector and use, be made into the keyboard interface plate by KB-ADP universal keyboard interface chip, according to system requirements required button is expanded on the panel, and the signal wire of each button is connected on the KB-ADP type universal keyboard interface chip.The keyboard signal line of the data-interface of KB-ADP II type universal keyboard and the PS/2 mouth of PC104 links to each other, optimizing keyboard becomes QWERTY keyboard interface sequence signal with the ranks matrix coder and outputs to the PS/2 port of industrial computer, the effect that reaches the keyboard expansion and optimize by KB-ADP type universal keyboard data-interface.Application program can be with it as QWERTY keyboard, and just button has made to delete design and layout to make things convenient for the detector panel according to the demand of this detector.

K-represents the Keyboard keyboard in the PS/2 interface definition, and K-DAT represents the keyboard data signal pin, and K-CLK represents keyboard clock signal pin, and VDD is+5V that GND is ground.

In keyboard Designing, K-CLK, K-DAT, VCC, the GND signal pins of KB-ADP is connected respectively to K-CLK, K-DAT, VCC, the GND pin of the last PS/2 port of PC104.Need in the expansion of keyboard that all buttons of using are connected to panel with this tester, and the coding of button to be definition according to QWERTY keyboard be provided with, the button that is about to the definition of QWERTY keyboard coding connects each push button signalling pin.In optimizing keyboard Designing, according to system requirements and customer requirements, only need to use just can finish groundwork as the button among Fig. 3, need not the extension standards keyboard and also can guarantee normally to finish each program.On the detector panel, fix required button, and with the signal end pin of each button according to the ranks position shown in the QWERTY keyboard ranks matrix coder, be connected respectively to ranks pin corresponding on the universal keyboard interface card.Wherein last column is distinguished corresponding QWERTY keyboard F1-F6 from left to right.

The matrix keyboard numerical key can be finished basic data input and direction Control work under the two states of num key, when pressing " north, navigation, demarcation, bookbinding, self check are floated, sought in survey " these 6 function keys special function of corresponding navigational system respectively: detect the gyroscopic drift error, the real north value of carrier shows, the target location navigation of travelling, caliberating device measures the reference mark coordinate, and the oneself of navigation information bookbinding and initial program detects.

Claims

1. a matrix keyboard is used for positioning and directing system detector, and this matrix keyboard comprises: 6 special function keys, be specially survey float key, seek northern key, navigation key, demarcation key, bookbinding key, self check key; Two brilliance control keys; 12 numeral/operating keys comprise 0-9 10 numeric keys, a numeral switching num key, a symbolic key; One acknowledgement key; One ESC Escape; One delete key; One reset key; Numeric keypad switches in this numeral can do the directionkeys use when num key function does not start, energy normal input data behind this numeral switching num key function on, convert push button signalling to code that windows operating system can be discerned by the decoding plate, directly link on the keyboard port of computing machine plate.

2. matrix keyboard according to claim 1 is characterized in that, el cell all is installed behind each button.

3. matrix keyboard according to claim 1 is characterized in that, as line, form as alignment by 6 I/O lines by 4 I/O lines for described matrix keyboard.

4. matrix keyboard according to claim 3, it is characterized in that, a button is set on each point of crossing of line and alignment, key number in the keyboard is 4 * 6 like this, the keyboard decoding chip constantly to circuit carry out line by line, alignment scanning, when the place, point of crossing has key to press, convert the input button ranks matrix coder that reads in to QWERTY keyboard interface sequence signal, be transferred to computing machine by serial i/O circuit.

5. matrix keyboard according to claim 4 is characterized in that, described keyboard decoding chip is a KB-ADP universal keyboard interface chip.

6. according to the described matrix keyboard of claim 1-5, it is characterized in that, " north, navigation, demarcation, bookbinding, self check are floated, sought in survey " these 6 function keys are the special function of corresponding navigational system respectively: detect the gyroscopic drift error, the real north value of carrier shows, the target location navigation of travelling, caliberating device measures the reference mark coordinate, and the oneself of navigation information bookbinding and initial program detects.

7. according to the described matrix keyboard of claim 1-5, it is characterized in that keyboard case adopts alloy material, button adopts engineering plastics.