Millisecond class real-time computer system monitoring apparatus

A technology of computer system and monitoring device, applied in the field of real-time computer system detection

Inactive Publication Date: 2008-06-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no protection device that can be used to monitor the working status of the real-time control computer and improve the reliability of the control system in the market.

Method used

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  • Millisecond class real-time computer system monitoring apparatus
  • Millisecond class real-time computer system monitoring apparatus
  • Millisecond class real-time computer system monitoring apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1. Waveform frequency finishing circuit

[0025] combine figure 2 and Figure 4 In this embodiment, the waveform finishing circuit includes 8-bit binary counters IC2 and IC3, the output pin of the quartz crystal oscillator IC1 is connected to R1 to pin 1 of the counter IC2, the 6 pins of the counter IC2 are connected to the 13 pins of the counter IC3, and the 2 pins of the counter IC2 are connected. Pins, 8 and 12 pins of IC3 are grounded, 3-5 pins of counter IC2, and 9-11 pins of IC3 are output.

[0026] Among them, the waveform finishing circuit is implemented by using an 8-bit binary counter. The input terminal is the standard frequency signal of the quartz crystal oscillator. In order to improve the accuracy of the base time signal of the precision system, the frequency of the quartz crystal oscillator is 1MHz. In order to simplify the structure of the shift register, a binary counter is used to organize the base time frequency. When the input signal is 1MHz, th...

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PUM

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Abstract

The invention provides a millisecond grade real-time computer system monitoring device which can judge the running status of a real-time control computer within time in millisecond grade, give alarm and carry out protection in case of abnormality of the computer system, and enable the real-time control system to operate more safely. The invention comprises a standard time clock square wave generating circuit, a waveform frequency sorting circuit, a shift circuit, a latch circuit and a system running heartbeat signal detection circuit for detecting operation of the real-time computer system, wherein the standard time clock square wave generating circuit is connected with the waveform frequency sorting circuit which is connected with a shift register, the shift register is connected with the latch circuit, the real-time computer system detection circuit is connected with the shift register, and the latch circuit is also connected with a six freedom degrees motion simulator protection loop. The invention can be applicable to detect normal operating status of the real-time computer system and drive a protective device to carry out protection in case of system abnormality.

Description

(1) Technical field [0001] The invention relates to the field of real-time computer system detection, in particular to a detection and monitoring device for detecting the operation of a real-time computer system. (2) Background technology [0002] At present, most of the industrial control CPUs have monitoring watchdog timers, but most of them are used in non-real-time systems and the general timing period is between 1-255s. Even if it is a dedicated timer, the timing period is basically about 30ms. This type of monitoring watchdog is mainly used for the protection of a single-system computer, and most of the protection methods are re-initialization programs. In a real-time control system with a high sampling and control cycle, the initialization program will bring danger to the system, and 30ms means that the system is in an open-loop state for a long time, which cannot guarantee the safe operation of the system. [0003] The six-degree-of-freedom motion simulator is a sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/048G06F11/00
Inventor 韩俊伟张辉丛大成姜洪州叶正茂靳军何景峰赵新通黄其涛郑淑涛
Owner HARBIN INST OF TECH
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