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Method for reducing writing failure probability of SD (Secure Digital)/TF (T-Flash) card

A probability and processing frequency technology, applied in the field of SD/TF card protection, can solve the problems of short recording file length, high probability of SD/TF card damage, and many recording files, so as to reduce the possibility of recording loss and reduce operation Cost and maintenance cost reduction effect

Active Publication Date: 2014-03-19
XIAMEN YAXON NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the time interval for recording files to be written to SD / TF card is fixed. If the interval is small, the probability of SD / TF card damage is high, but the duration of recording files lost due to abnormal situations such as car reset is small; Long, although the probability of SD / TF card damage is reduced, but the length of the recording file lost under abnormal circumstances will be longer

Method used

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Embodiment Construction

[0015] The present invention will be further described in conjunction with specific embodiments.

[0016] Because the writing times of ordinary SD / TF cards are limited, only about 100,000 times, so the writing frequency of SD / TF cards should not be too frequent, otherwise it is easy to write bad. At the same time, because the vehicle terminal program is generally designed to store the generated audio and video files in the memory first, and then write them into the SD / TF card after a fixed time interval. If the vehicle resets abnormally before the time for writing, the audio and video files in the internal memory will be lost. Therefore, if the writing frequency is too low and the writing interval is too large, the probability of losing audio and video files will increase.

[0017] According to our research and the actual needs of customers, taxi companies or the police mainly collect recordings in the following aspects: 1. Passenger disputes, including ordinary business deto...

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Abstract

The invention discloses a method for reducing writing failure probability of an SD (Secure Digital) / TF (T-Flash) card. The SD or TF card is arranged inside a processor of a vehicle-mounted terminal. The method for reducing the writing failure probability of the SD / TF card comprises the following steps of step one, the processor of the vehicle-mounted terminal obtains real-time operating state information through an empty overloading sensor, a passenger flow sensor and a communication module of a vehicle and the state information of the vehicle is divided into priorities in different levels; step 2, the processing frequency of state information of levels which are corresponding to the priorities is set and the processing frequency is the frequency for writing the SD / TF card; step 3, the processor of the vehicle-mounted terminal performs classified process on the state information of the levels according to the processing frequency. The method for reducing the writing failure probability of the SD / TF card has the advantages of successfully solving the industrial problem that the SD / TF card is easy to be damaged through writing, greatly reducing the writing failure probability of the SD / TF card, reducing possibility of losing records possibly and getting a balance between the writing failure and the record losing due to the fact that the writing frequency is automatically adjusted according to event states and SD / TF card states.

Description

technical field [0001] The invention relates to a method for protecting an SD / TF card, in particular to a method for reducing the probability of SD / TF card being damaged. Background technique [0002] Nowadays, many car GPS terminals or navigation screens use large-capacity SD / TF cards to store big data information such as recordings. Generally speaking, large data information such as recordings are often written to SD / TF cards continuously for 24 hours. However, the quality of SD / TF cards on the market varies, and the number of writes to SD / TF cards is also limited. Using the file system to read and write SD / TF cards continuously for a long time can easily cause SD / TF cards to be damaged. Therefore, there is a direct proportional relationship between the life of SD / TF card, the probability of damage and the writing frequency of recording files. [0003] At present, the time interval for recording files to be written to SD / TF card is fixed. If the interval is small, the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K1/12
Inventor 唐磊林德辉许宁林志强林弟杨锋
Owner XIAMEN YAXON NETWORKS CO LTD
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