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Vehicle-mounted hard disk protection method and system based on tire pressure detection
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A technology for hard disk protection and tire pressure detection, applied in the registration/indication of vehicle operation, poor vibration/sound insulation/absorption, registration/indication, etc., can solve problems such as measurement errors, and achieve improved accuracy and accurate triggering signal, the effect of improving accuracy
Active Publication Date: 2020-06-09
XIAMEN YAXON NETWORKS CO LTD
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Problems solved by technology
This method of judging the vibration of the car through the acceleration sensor does not directly measure the parameters directly related to the vibration of the car, so there are measurement errors and protection loopholes
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Embodiment 1
[0074] Please refer to Figure 1-3 , Embodiment 1 of the present invention is: a method for protecting a vehicle-mounted hard disk based on tire pressure detection, comprising the following steps:
[0075] S1: Initialize parameters, preset counting safety value and timing cycle; optionally, preset counting cycle proportional coefficient, number of video channels, single-channel video unit time data volume and counting safety value, and obtain the video buffer capacity of the on-board processor According to the calculation formula timing period=(video cache capacity / (single channel video unit time data volume*video channel number))*counting period proportional coefficient*unit time, the timing period is obtained.
[0076] S2: Obtain the tire pressure fluctuation signal according to the change of the air pressure in the tire; optionally, detect the change of the air pressure in the car tire through the built-in tire pressure detection sensor, and the tire pressure sensor can con...
Embodiment 2
[0089] Please refer to Figure 4-5 The second embodiment of the present invention is a vehicle-mounted hard disk protection system based on tire pressure detection corresponding to the above method, including a preset module 1, an acquisition module 2, a filter module 3, a conversion module 4, a timing and counting module 5, and a judgment module 6 , output module 7, first storage module 8 and second storage module 9;
[0090] The preset module 1 is used for preset counting safety value and timing cycle;
[0091] The acquisition module 2 is used to acquire tire pressure fluctuation signals according to changes in tire internal pressure;
[0092] The filter module 3 is used to filter the tire pressure fluctuation signal to obtain a high-frequency and high-amplitude tire pressure fluctuation signal; including
[0093] A first filtering unit 31, configured to filter out low-frequency signals in the tire pressure fluctuation signal;
[0094] The second filtering unit 32 is used...
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Abstract
The invention discloses an onboard hard disk protection method based on tire pressure detection and a system thereof. The method includes the following steps: presetting a counting safety value and a counting period; according to changes of air pressure inside the tire, acquiring an air pressure fluctuation signal; filtering the air pressure fluctuation signal to obtain air pressure fluctuation signals having high frequency and high magnitude; converting the air pressure fluctuation signals having high frequency and high magnitude to pulse signals; keeping time based on a counting period, counting the number of the pulse signals; if within the counting period, the counting number of the pulse signals is smaller than the counting safety value, outputting a signal. The method can directly represent the changes to tire pressure of vibration frequencies and magnitudes of an entire vehicle, acquires tire pressure fluctuation signals, and increases the accuracy in determining the vibration of the vehicle body; by carrying out filtering processing, the method removes low frequency and low magnitude fluctuation signals which do not cause the failure of hardware, and provides accurate triggering signals for triggering protection actions of the hardware.
Description
technical field [0001] The invention relates to the technical field of vehicle hard disk protection, in particular to a method and system for protecting a vehicle hard disk based on tire pressure detection. Background technique [0002] Currently on the market, due to cost and hard disk capacity considerations, most vehicle-mounted video surveillance terminals use mechanical hard disks as video file storage media. Mechanical hard drives have high requirements for the stability of the use environment, so most vehicle-mounted video surveillance terminals will be designed with various anti-vibration and shock-absorbing measures, but these measures still cannot guarantee the stable work of the hard drive under certain road conditions, and in these If the hard disk continues to work and data is written into it under certain circumstances, it is easy to cause bad sectors on the hard disk, and even damage the hard disk’s disk-reading laser head. [0003] In the patent document wit...
Claims
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