ELectric vehicLe instrumentation system and scheduLing method thereof

An instrument system and electric vehicle technology, applied in the field of control, can solve problems such as the inability to change the execution sequence, large fluctuations in waiting time, and difficulty in ensuring real-time performance, and achieve the effects of convenient maintenance and transplantation, low scheduling overhead, and high real-time performance

Inactive Publication Date: 2018-11-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this mode, the execution frequency of each task function is forced to be the same, the execution order cannot be changed, and the waiting time of each task fluctuates greatly, making it difficult to guarantee real-time performance

Method used

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  • ELectric vehicLe instrumentation system and scheduLing method thereof
  • ELectric vehicLe instrumentation system and scheduLing method thereof
  • ELectric vehicLe instrumentation system and scheduLing method thereof

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0025] figure 1 It is a block diagram of the overall structure of the electric vehicle instrument system. The electric vehicle instrument system includes:

[0026] The power module 101 is used to convert the voltage provided by the storage battery 112 into the working voltage required by each component. The storage battery 112 provides 12V working voltage, and the normal working voltage of the device on the present invention is 5V, 3.3V, 1.8V and 1.1V respectively, such as the LED indicator module and the segment code liquid crystal drive chip etc. need 5V working voltage, emulator interface circuit etc. A 3.3V operating voltage is required, while 1.8V and 1.1V operating voltages are used on memory chips. The voltage in the present invention is further divided into two types: cut-off and non-cut-off, in order to reduce the static power ...

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Abstract

The invention provides an eLectric vehicLe instrumentation system and a scheduLing method thereof. The eLectric vehicLe instrumentation system comprises a power moduLe, a CAN communication moduLe, a hard Line signaL acquisition moduLe, a stepper motor moduLe, a buzzer moduLe, a key moduLe, an FLASH storage moduLe, a TFT-LCD dispLay moduLe, an LED moduLe and a segment code LCD moduLe, wherein the voLtage of the power moduLe is divided into two types: cuttabLe and uncuttabLe. The task of each moduLe described above is written as a function interface, the task is divided into ASAP cLass and ALAPcLass, and the ASAP cLass task is executed first. Based on an improved high-response ratio priority task scheduLing aLgorithm and taking into account the infLuence of tasks waiting time and service time on task priority, the system introduces a task deadLine missing mechanism to minimize the system overhead of task scheduLing and each time a task with highest response ratio in the same category isseLected. The method improves the reaL-time performance of the system.

Description

technical field [0001] The invention relates to an electric vehicle instrument system, and also relates to a scheduling method for the electric vehicle instrument system, which belongs to the field of control. Background technique [0002] The car instrument information system is the main way for the driver to understand various information of the car. Electric vehicle instrumentation systems often require stability, reliability, and high real-time requirements. In the software design of many electric vehicle instrumentation systems, the traditional front-end and back-end cycle design patterns are used. In this mode, the execution frequency of each task function is forced to be the same, the execution order cannot be changed, and the waiting time of each task fluctuates greatly, making it difficult to guarantee real-time performance. Contents of the invention [0003] The object of the present invention is to provide an electric vehicle instrument system and its dispatch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K35/00
CPCB60K35/00
Inventor 刘斌韩琛蒋峥万兴
Owner WUHAN UNIV OF SCI & TECH
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