A non-contact remote water level detection method based on chaotic laser

A chaotic laser and water level detection technology, which is applied in measuring devices, engine lubrication, liquid/fluid solid measurement, etc., can solve the problems of poor stability of commercial MODEM, high price of MODEM, unstable wireless signal, etc. The effect of low power consumption and flat power spectrum

Active Publication Date: 2016-04-06
TAIYUAN UNIV OF TECH
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Problems solved by technology

Wireless communication needs to establish signal relay stations on high mountains and beside rivers, so the investment is very large. Moreover, general wireless signals are unstable and easy to be interfered. In severe cases, signal interruptions are caused, and cascaded wireless transmission networks are often required.
Wired communication often adopts PSTN network, using MODEM communication, the price of dedicated MODEM is high, and the long-term working stability of commercial MODEM is poor (Yu Lijian. Water level remote measurement and data transmission technology. Journal of Testing Technology, 2008, 22 (4): 296-300. He Song Fuguo, Li Ping. Research on remote water level monitoring and early warning system of flood control station. China Integrated Circuit. 2013, (1): 86-89)

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  • A non-contact remote water level detection method based on chaotic laser

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Embodiment approach 1

[0023] Implement a kind of non-contact remote water level detection method based on chaotic laser provided by the present invention, its specific implementation method is as follows:

[0024] An ultra-broadband chaotic laser source 1 is set, and the chaotic laser source 1 generates an ultra-broadband chaotic laser and is divided into a detection light and a reference light through a fiber coupler 2; wherein, the detection light passes through the first single-mode fiber 3 to the optically adjustable attenuation device 4, which controls the power of its detection light, and then converts it into a corresponding electrical signal by the first photodetector 5, which is amplified by the first low-noise amplifier 6 and then emitted by the ultra-wideband transmitting antenna 7; The broadband receiving antenna 8 receives the partial reflection signal of the liquid surface 17, and then the output of the laser 10 is linearly modulated after being amplified by the second low-noise amplif...

Embodiment approach 2

[0028]To implement a non-contact remote water level detection method based on chaotic laser according to the present invention, firstly, a central station, a transmission optical fiber and a remote antenna end are set. Wherein, the central station includes an ultra-broadband chaotic laser source 1, a fiber coupler 2, a third single-mode optical fiber 15, a third photodetector 14, a second photodetector 13 and a data processing center 16; the transmission optical fiber It comprises a first single-mode optical fiber 3 and a second single-mode optical fiber 12; the remote antenna end comprises an optical adjustable attenuator 4, a first photodetector 5, a first low-noise amplifier 6, an ultra-wideband transmitting antenna 7, An ultra-broadband receiving antenna 8 , a second low noise amplifier 9 , a semiconductor laser 10 and an optical amplifier 11 .

[0029] First, the ultra-broadband chaotic signal generated by the ultra-broadband chaotic laser source 1 is used as a detection ...

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Abstract

The invention provides a non-contact remote water level detecting method based on chaos laser, which is characterized in that an ultra wide band chaos signal serves as a detection signal and reaches a remote antenna terminal after being transmitted by long single mode optical fiber to be transformed into a corresponding electrical signal to be emitted by an ultra wide band antenna, the detection signal is received by an ultra wide band antenna of the same type after being partially reflected at the water level, after a laser is linearly modulated, the electrical signal is transformed into a corresponding optical signal and then is transmitted by signal mode optical fiber, the optical signal returns to a data processing center to be subjected to data processing, so that water surface elevation information is obtained and is displayed, and finally remote water level real-time monitoring is realized. The method can be used for the remote water level real-time monitoring of dangerous environments, such as flood protection and emergency engineering, coal, flood control stations of alpine and gorge regions, seas and sea island resource development workstations.

Description

technical field [0001] The invention relates to a remote water level detection method, in particular to a remote water level monitoring or remote real-time monitoring method based on chaotic signals. technical background [0002] The water level detection method is not only used in high-level water tanks, water towers, urban underground water pipe networks, underground pool wells, etc. , farmland water conservancy monitoring and other fields. [0003] With the rapid development of science and technology, due to people's unreasonable development of the natural environment and economic development, the ecological balance has been seriously damaged, and the frequency of disasters has continued to increase, which seriously threatens the survival of human beings. How to do a good job in flood control and disaster reduction, improve detection and prevention The means are the premise. [0004] There are many methods of water level monitoring adopted at home and abroad, such as di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284
Inventor 张明江吉勇宁王云才王安帮武媛王冰洁
Owner TAIYUAN UNIV OF TECH
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