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Matrix keyboard for detector of positioning orientating system

A matrix keyboard, positioning and orientation technology, applied in the field of input devices, can solve problems such as inability to use a mouse, large size, etc., to facilitate performance testing and fault diagnosis, and ensure portability and reliability.

Inactive Publication Date: 2011-08-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the known keyboard is the standard keyboard on an ordinary PC, which is relatively large in size, so the operation of the detector cannot be completed through the standard keyboard, nor can the mouse be used. At the same time, in order to realize the needs of navigation and positioning, several necessary navigation, north-finding and other function keys

Method used

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  • Matrix keyboard for detector of positioning orientating system
  • Matrix keyboard for detector of positioning orientating system
  • Matrix keyboard for detector of positioning orientating system

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Embodiment Construction

[0012] figure 1 The middle matrix keyboard is composed of 4 I / O lines as row lines and 6 I / O lines as column lines. A key is set at each intersection of row lines and column lines to save I / O ports. The number of keys in the keyboard is 4×6. Its working principle is that the row line is connected to the 5v power supply through a pull-up resistor. If there is no button, the row line is at high level. When a key is pressed, the row line level state will be determined by the If the column line level is low, the row line level is low; if the column line level is high, the row line level is high.

[0013] figure 2 In the standard keyboard, the key value corresponding to each key can be uniquely corresponded by a row scan code and a column scan code. This chip uses this correspondence to regard the user-defined key as a certain row scan code Combination of L1-L8 and a column of scan codes C1-C13. For example, the "K" key on the keyboard, the corresponding row scan code is L8, an...

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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

technical field [0001] The invention relates to an input device for a detector of a positioning and orientation system, in particular to an external matrix keyboard suitable for a detector whose weight and volume are limited to a certain extent, and uses as few keys as possible to realize all its functions. Background technique [0002] The vehicle navigation system is an autonomous inertial navigation system. Inertial navigation is an indispensable means of navigation in modern weapons and equipment, because it belongs to autonomous navigation and only depends on the output of its own inertial sensitive elements relative to the inertial reference system. It needs any external information and is free from natural or human interference, so it is favored by the military department and is widely equipped in various weapon systems. It relies on inertial technology to determine its own position and the best route from each target point. Due to the mobility, speed and flexibility ...

Claims

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Application Information

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IPC IPC(8): G06F3/02
Inventor 徐建华韩勇强李振华孙寿才谢玲
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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