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Variable-granularity feature sampling method based on multimedia sensor

A multimedia sensor and variable granularity technology, applied in advanced technology, power management, electrical components, etc., can solve the problems of long network survival time, short survival time, and reduced sensing accuracy

Active Publication Date: 2018-10-09
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology

[0003] To measure the effectiveness of WMSNs, that is, wireless multimedia sensor networks, it is generally considered that there are two sensor nodes with the same transmission bandwidth, transmission rate, energy consumption and computing energy consumption, and the sensing accuracy is the survival time of nodes with high sampling resolution and sampling bit rate Relatively short, while reducing the sensing accuracy, the sensing energy consumption is low, and the network survival time is relatively long

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Embodiment 1

[0114] This embodiment illustrates the application of the present invention "a variable granularity feature sampling method based on a multimedia sensor" to the algorithm flow of saving energy and improving accuracy in the process of multimedia image acquisition, as shown in figure 1 shown.

[0115] Step A: For specific implementation, according to the resolution requirements of multimedia images, initially set the sampling period of the sensor T = 0.01 and the initial value κ of the ratio of periodic active to dormant periods κ 0 =0.3, and the initial value θ of the periodic control parameter θ 0 =0, set the initial working mode Y 0 =A, that is, Y=Y 0 , the initial mode of the node is that mode A is coarse-grained sampling at periodic intervals; U is the cycle count, that is, the number of cycles, and U starts counting from 0 when powering on.

[0116] Set the value of the following parameters

[0117]

[0118] Among them, λ is the index of the event arrival time inter...

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Abstract

The invention discloses a variable-granularity feature sampling method based on a multimedia sensor, and belongs to the field of energy consumption and storage of multimedia sensors. In the sampling process of the multimedia sensor, the residual energy of the sensor is estimated by the period, an energy-saving mode is switched by a membership threshold function, and a high-precision mode is switched by a high-precision measurement threshold function to realize the sampling mode of variable-precision sampling, thus changing the active and dormant time in the period, achieving energy-saving andhigh-precision sampling goals, and enhancing the working time and value of the sensor. Through adoption of the method, the sensing accuracy and the network lifetime can be balanced effectively; a balance is achieved between the two; and meanwhile the measurement accuracy and the reduction of energy consumption are ensured.

Description

technical field [0001] The invention relates to a variable granularity feature sampling method based on a multimedia sensor, which is used to reduce energy consumption during the use of the sensor, and belongs to the field of energy consumption and storage of multimedia sensors. Background technique [0002] As the monitoring environment becomes increasingly complex and changeable, the simple data fusion obtained by traditional wireless sensor networks (WSNs) can no longer meet the comprehensive needs of environmental monitoring, and there is an urgent need to combine information-rich images, audio, video and other multimedia The information is introduced into the environmental monitoring activities based on the sensor network. Therefore, based on the traditional two sensor networks, it is very important to study a wireless multimedia sensor network (wireless multimedia sensor networks, WMSNs) that has the functions of audio, image, video and other multimedia information acq...

Claims

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Application Information

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IPC IPC(8): H04W52/02H04W84/18
CPCH04W52/02H04W52/0203H04W84/18Y02D30/70
Inventor 郭树理韩丽娜张禾桂心哲陈启明张祎彤弗朗斯刘宏斌范利
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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