Granted Patent B2

US 12,200,396 · App. 17/728,960 · Granted Jan 14, 2025

Inventors: Xiaohua Tong (Shanghai, CN); Peng Chen (Shanghai, CN); Huangping Ma (Shanghai, CN); Huan Xie (Shanghai, CN); Yongjiu Feng (Shanghai, CN); Shijie Liu (Shanghai, CN); Yanmin Jin (Shanghai, CN); Xiong Xu (Shanghai, CN); Sicong Liu (Shanghai, CN); Zhen Ye (Shanghai, CN); Chao Wang (Shanghai, CN)

Assignee: TONGJI UNIVERSITY

H04N5/907H04N5/77H04N25/71

Abstract

Claims (29)

1. A method for asynchronously storing massive data generated during high speed video measurement, comprising the following steps:

step (1), constructing a high speed video measurement hardware model; and

step (2) realizing asynchronous I/O real-time storage in a high speed solid state disk on a basis of Windows core programming,

wherein the step (2) comprises:

step 201 , asynchronous I/O preprocessing process, comprising: step 2011 , providing an absolute path of a file to be stored; connecting a corresponding device by using the absolute path of the file to be stored as a parameter; creating an I/O completion port, and binding the I/O completion port to a started device; pre-sending a write command with four null bytes; setting to start to store data; and starting up a thread to prepare for the cyclic asynchronous I/O process of the massive data;

step 202 , cyclic asynchronous I/O processing process of massive data; and

step 203 , asynchronous I/O stopping-storing processing process.

2. The method for asynchronously storing massive data generated during high speed video measurement according to claim 1 , wherein the step (1) constructing the high speed video measurement hardware model specifically is as follows:

step 101 , constructing an analog data source hardware module;

step 102 , constructing a high speed transmission hardware module; and

step 103 , constructing a high speed storage hardware module.

3. The method for asynchronously storing massive data generated during high speed video measurement according to claim 2 , wherein the step 101 specifically is as follows:

using a complementary metal-oxide-semiconductor (CMOS) high speed camera as an analog data source, wherein a resolution of the COMS high speed camera is 2048×2000, an acquisition frame frequency of the COMS high speed camera is 500 fps, and an image bit depth of the COMS high speed camera is 8 bits.

4. The method for asynchronously storing massive data generated during high speed video measurement according to claim 2 , wherein the step 102 specifically is as follows:

using two optical fiber mediums to connect a CMOS high speed camera data simulator and a high speed image acquisition card, and using a Camera Link HS interface as a data transmission interface.

5. The method for asynchronously storing massive data generated during high speed video measurement according to claim 2 , wherein the step 103 specifically is as follows: using an M.2 type NVMe (non-volatile memory express) protocol high speed solid state disk as a storage medium, wherein the storage medium adopt a memory array form.

6. The method for asynchronously storing massive data generated during high speed video measurement according to claim 1 , wherein the step 202 specifically comprises the following steps:

step 2021 , first checking whether to start to store data; if not, then directly ending the processing process, otherwise executing step 2022 ;

step 2022 , checking an I/O completed queue;

step 2023 , determining whether a write command is completed; if not, then continuously checking the I/O completed queue, otherwise executing step 2024 ;

step 2024 , reading a data block from a buffer pool; and

step 2025 , sending a write-in-device command, and updating a written offset value.

7. The method for asynchronously storing massive data generated during high speed video measurement according to claim 6 , wherein the data block in the step 2024 is in a size of a single frame image.

8. The method for asynchronously storing massive data generated during high speed video measurement according to claim 1 , wherein the step 203 specifically comprises the following steps:

step 2031 , determining whether stopping-storing is triggered; if the stopping-storing is triggered, executing step 2032 ;

step 2032 , starting up a thread;

step 2033 , checking whether preset time is consistent with storage time; if the preset time is consistent with the storage time, executing step 2035 ; if the preset time is not consistent with the storage time, executing step 2034 ;

step 2034 , continuously waiting until the storage time is consistent with the preset time, and then executing step 2035 ; and

step 2035 , directly setting to stop storing.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (35)