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A wireless data acquisition and processing method and its system

A wireless data and processing system technology, applied in transmission systems, signal transmission systems, near-field transmission systems, etc., can solve the problems of inability to meet large data transmission, reduce data acquisition accuracy, and low protocol power consumption, and reduce data The number of transmissions, the improvement of effective utilization, and the effect of solving bandwidth bottlenecks

Active Publication Date: 2007-05-30
无锡必创测控科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The 802.11b / g protocol can provide a wide bandwidth for system wireless data transmission, but it consumes a lot of power and costs, so it is not suitable for low-power devices powered by batteries
The 802.15.4 protocol has low power consumption and has the ability to form a huge wireless sensor network, but the data transmission bandwidth provided is small, which cannot meet the needs of large data transmission, and cannot form a wireless sensor network with broadband acquisition requirements
[0003] In addition, if you want to achieve high-precision dynamic data acquisition, you can only achieve a sampling rate of about 1KHz with a low-power 16-bit microcontroller and a 24-bit AD.
However, the existing wireless sensor network nodes do not have data processing functions, and there is no way to use digital filters, so in order to prevent aliasing, a high-order low-pass anti-aliasing filter must be used
However, it is impossible to design high-order filter hardware in wireless sensor network nodes that have strict requirements on power consumption and volume. When the filter cannot achieve a sufficient attenuation rate, the accuracy of data acquisition will be greatly reduced

Method used

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  • A wireless data acquisition and processing method and its system
  • A wireless data acquisition and processing method and its system

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no. 1 example

[0025] As shown in Figure 1, the system of this embodiment includes a data conditioner, an analog low-pass filter, an analog-to-digital converter (AD), a main processor, a wireless communication module and a power transmission module connected in sequence, and the main processor is connected External memory, and a power module connected to the active devices in the above modules. In addition, the wireless communication module is also connected to the data conditioner (not shown), and only the main direction of data transmission is shown in the figure, wherein:

[0026] The data conditioner can collect and process various dynamic sensor signals, including pressure, acceleration, strain, torque, etc. Various sensors can be embedded in the data conditioner to form a wireless sensor network node, and existing sensors can also be connected to the interface of the data conditioner to form a wireless sensor network node.

[0027] The analog low-pass filter uses a 5th-order Butterwor...

no. 2 example

[0059] The overall structure and method flow of this embodiment are the same as those of the first embodiment, as shown in FIG. 1 and FIG. 2 . Only the specific implementations of the main processor and the wireless communication module in this embodiment are different from those in the first embodiment, which will be described in detail below.

[0060] main processor

[0061] The main processor in this embodiment adopts a model BF531 digital signal processor, which is characterized by low power consumption and powerful data processing capability. Its core uses a core voltage of 1.2V and a peripheral interface voltage of 3.3V, and operates at a low power consumption of 0.05mW / MIP. BF531 supports rich peripheral interfaces, which can complete functions such as data collection, processing, transmission and control of other devices.

[0062] There is no FLASH inside BF531, and its program loading needs external memory. The system uses memory AM29LV040 to load the program.

[...

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Abstract

This invention relates to wireless data collection and process method and system, which orderly comprises data adjuster, analogue low pass filter, A / D converter, main processor, wireless communication module and receive antenna and memory connected to main processor and power module with power parts. The method comprises the following steps: adjusting digital signal form digital filtering and processing analogue low pass filter converted into digital signals; after filtering on digital signal and processing time zone signal compression and property extracting to realize wireless receive and send of data.

Description

technical field [0001] The invention relates to an embedded wireless data collection and processing method and a system thereof. Background technique [0002] Traditional data measurement uses wired transmission. The on-site wiring of data acquisition is complicated, and the amount of data transmitted is large. The required results can only be obtained after the results of data acquisition are sent to the computer for data analysis. In order to reduce the complexity of on-site wiring, the transmission mode tends to be changed to wireless network transmission. The more popular network transmission protocols are 802.11b / g and 802.15.4 protocols. The 802.11b / g protocol can provide a wide bandwidth for system wireless data transmission, but it consumes a lot of power and costs high, and is not suitable for low-power devices powered by batteries. The 802.15.4 protocol has low power consumption and has the ability to form a huge wireless sensor network, but the data transmissio...

Claims

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Application Information

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IPC IPC(8): H04B5/00G08C17/02H04L29/06H04L12/28
Inventor 孙岩松唐智斌代啸宁
Owner 无锡必创测控科技有限公司
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