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Electronic control apparatus

An electronic control device and control processing technology, applied in the direction of electrical digital data processing, instrumentation, error detection/correction, etc., can solve problems such as failure occurrence and inability to safely control machines

Active Publication Date: 2014-06-25
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The miniaturization of memory has recently progressed, and the possibility of failure such as an unexpected change in the value of the program and data built in the memory due to the influence of manufacturing failure, noise, radiation, etc. has increased.
Since the electronic control unit performs control calculations based on this program and data, there is a risk that the machine cannot be safely controlled if the memory fails

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 It is a functional block diagram of the electronic control device 1 according to Embodiment 1 of the present invention. The electronic control device 1 is a device for electronically controlling equipment, and includes a microcontroller 2 , an input circuit 3 , an output circuit 4 , and a power supply circuit 5 .

[0029] Microcontroller 2 has CPU (Central Processing Unit, central processing unit) 10, ROM (Read Only Memory, read-only memory) 11, RAM (Random Access Memory, random access memory) 12, peripheral bus controller 13, A / D converter 14 , timer 15 , communication interface (I / F) 16 , and oscillator 17 . The CPU 10 , ROM 11 , RAM 12 , and peripheral bus controller 13 are connected to an internal bus 18 . An A / D converter 14 , a timer 15 , a communication interface (I / F) 16 , an oscillator 17 , and a peripheral bus controller 13 are connected to a peripheral bus 19 .

[0030] The CPU 10 receives input signals from various sensors and other electronic c...

Embodiment approach 2

[0079] Figure 6 It is a figure which shows the structure of the program and data stored in the ROM11 with which the electronic control apparatus 1 of Embodiment 2 is equipped. The ROM 11 according to the second embodiment includes a data swap execution unit 25 instead of the data storage / deletion execution unit 23 described in the first embodiment. Other functional parts included in the electronic control device 1 are the same as those in the first embodiment. The same applies to RAM12.

[0080] When the data exchange execution unit 25 receives the notification of the detected data error from the error detection / correction unit 22, it exchanges the data stored in the first storage area A1 with the data stored in the second storage area A2. That is, in Embodiment 2, the second storage area A2 does not need to be a blank area. The specific processing flow will be described later. "Data storage" in the second embodiment is equivalent to the data exchange execution unit 25 . ...

Embodiment approach 3

[0104] Embodiment 3 of the present invention describes an operation example in which, when a data error is detected in the first storage area A1, the corrected data is not immediately stored in the second storage area A2, but the corrected data is stored when data errors accumulate to a certain extent. . Since the configuration of the electronic control device 1 is the same as that of the first embodiment, the following description will focus on differences.

[0105] Figure 9 It is a figure which shows the processing flow when the electronic control device 1 reads the data stored in the data storage part 21 in Embodiment 3. Below, for Figure 9 Each step is explained.

[0106] ( Figure 9 : Steps S10 to S12)

[0107] These steps are the same as those of Embodiment 1 Figure 4 Steps S10 to S12 are the same as described above. However, steps S15 to S16 are executed between steps S11 and S13, and step S17 is executed after step S12.

[0108] ( Figure 9 : step S15)

[...

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Abstract

Provided is an electronic control apparatus equipped with a highly-reliable memory that can inhibit the amount of memory to be used. When an electronic control apparatus according to the present invention detects a data error in a first storage space, the electronic control apparatus stores corrected data in a second storage space that is different from the first storage space, uses the data in the second storage space for a control process, and also continues to use the data in the first storage space for the control process.

Description

technical field [0001] This invention relates to electronic control devices for electronically controlling the movement of machines. Background technique [0002] In recent years, machines such as automobiles, construction machines, and elevators have been electronically controlled using electronic control devices consisting of input circuits, microcontrollers, output circuits, and power circuits. The electronic control device is the following device: receiving input signals from various sensors, the microcontroller implements control operations based on the programs and data built in the memory, drives the output circuit to control various actuators and switches, etc., so that the machine can achieve the most suitable action state. [0003] The recent progress in the miniaturization of memories has increased the possibility of failures in which the values ​​of programs and data built in the memories change unexpectedly due to manufacturing failures, noise, radiation, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/16
CPCG06F11/1076G06F12/16G06F11/1008G06F11/167
Inventor 樱井康平成泽文雄松原正裕永浦涉
Owner HITACHI ASTEMO LTD
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