Soil pore water conductivity multi-point automatic monitoring apparatus

Abstract

The invention discloses a multipoint automatic conductivity monitoring device of pore water in soil. N sensors with identical structure are respectively connected with coaxial multiplexers at BNC joints via coaxial cable, the coaxial multiplexers are excited by electromagnetic wave and a receiver is connected with a PC computer. Each sensor includes external conductors of coaxial cables, internal conductors of coaxial cables, an epoxy resin box, a first test probe, a second test probe and a third test probe, wherein the second test probe is connected with the internal conductors of the coaxial cables; the first test probe and the third test probe are distributed on both sides of the second test probe at equal distance and are connected with the external conductors of the coaxial cables; and the connection joints are disposed in the epoxy resin box. The conductivity EC omega of pore water in soil can be monitored by PC software to evaluation the pollution degree of the soil. The method is specifically suitable for long-time remote-control multipoint monitoring in sanitary landfill under high corrosion condition, and has the advantages of rapid monitor, convenient operation and high automation degree.

Description

technical field [0001] The invention relates to a detection device utilizing electromagnetic wave reflection, in particular to a multi-point automatic monitoring device for soil pore water conductivity. Background technique [0002] At present, in terms of pollution prevention and control measures, people pay more attention to technical measures such as engineering restoration, biological restoration, physical and chemical restoration, electrokinetic restoration, etc., and do not pay enough attention to the monitoring of soil pollution. Most of the soil pollution testing methods in engineering are indoor. Testing and pollution monitoring instruments are limited to complex testing instruments (HP network analyzers, HP impedance analyzers) used in indoor tests. The disadvantages are 1: it is difficult to prepare samples and require long-term indoor experiments; 2. It is impossible to conduct on-site testing. real-time monitoring. [0003] In addition, the current soil polluti...

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Problems solved by technology

[0002] At present, in terms of pollution prevention and control measures, people pay more attention to technical measures such as engineering restoration, biological restoration, physical and chemical restoration, electrokinetic restoration, etc., and do not pay enough attention to the monitoring of soil pollution. Most of the soil pollution testing methods in engineering are indoor. Testing and pollution monitoring instruments are limited to complex testing instruments (HP network analyzers, HP impedance analyzers) used in indoor tests. The disadvantages are 1: it is difficult to prepare samples and require long-term indoor experiments; 2. It is impossible to conduct on-site testing. real-time monitoring

[0003] In addition, for the current soil pollution tester, the content of heavy metal ions in the soil can be measured on site, but it cannot realize multi-point testing and long-term monitoring on the test site

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