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Raspberry Pi-based remote transmission method for weak signal

A long-distance transmission and weak signal technology, applied in the field of signal transmission, to achieve the effect of simple and convenient operation and low cost

Inactive Publication Date: 2018-05-25
天津邦纳科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

However, there are uncertain factors such as microcontroller power consumption and program reliability.

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  • Raspberry Pi-based remote transmission method for weak signal
  • Raspberry Pi-based remote transmission method for weak signal
  • Raspberry Pi-based remote transmission method for weak signal

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Embodiment Construction

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, a specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0017] like figure 1 For the conversion and transmission of the signal shown, first, the sensor 1 inputs the measured analog signal into the preamplifier 2 to amplify it, and the first Raspberry Pi microcomputer selects the required signal according to the control signal and connects the input terminal to the output terminal. , the unnecessary signal route is disconnected, the required analog signal is amplified by the main amplifier 4 and filtered by the filter 5, and then the analog signal enters the A / D conversion circuit 6 to be converted into a digital signal, and the digital signal enters the first Raspberry Pi microcomputer 9 , the first raspberry pie microcomputer 9 packs the digital signal and the original info...

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Abstract

The invention relates to a raspberry Pi-based remote transmission method for a weak signal. After the weak signal is subjected to amplification processing and filtering processing, an analog signal isconverted into a digital signal through A / D conversion, a first semiconductor laser is driven by a laser driving circuit to convert the digital signal into an optical signal, the optical signal is coupled into an optical fiber through a first optical fiber coupler, the signal is amplified again in the transmission process to lengthen the transport distance, and receiving and conversion of the signal are achieved under control of a raspberry Pi in a transmission terminal. The method has the advantages that the signal is amplified multiple times in transmission, a signal sending and receiving circuit is controlled by the raspberry Pi microcomputer, multiple multiplex circuits are arranged, therefore, operation is easy and convenient, and the cost is reduced.

Description

Background technique [0001] The present invention relates to a signal transmission method, in particular to a remote transmission method for weak signals based on Raspberry Pi. Background technique [0002] At present, weak analog signals below 1 millivolt generally cannot be transmitted with long-distance wires exceeding 100 meters, because the signals are very easily affected by space electromagnetic radiation and common-mode signals, resulting in transmission distortion. Therefore, digital-to-analog converters are generally used at short distances to convert weak analog signals into digital signals, read the conversion results through a single-chip microcomputer, and finally transmit the converted results to the remote end through various transmission methods. However, there are uncertain factors such as single-chip power consumption and program reliability in single-chip microcomputers. During the transmission, the signal is amplified multiple times, and the Raspberry...

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Application Information

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IPC IPC(8): H04B10/299H04B10/25
CPCH04B10/25891H04B10/299
Inventor 王斌徐晓轩
Owner 天津邦纳科技有限公司
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