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雙針結(jié)構(gòu)土壤水分傳感器探針最優(yōu)長(zhǎng)度分析與試驗(yàn)
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林業(yè)公益行業(yè)科研專(zhuān)項(xiàng)（200704040）;國(guó)家自然科學(xué)基金資助項(xiàng)目 （30671715）;北京市教育委員會(huì)共建項(xiàng)目建設(shè)計(jì)劃科學(xué)研究與科研基地建設(shè)項(xiàng)目（2008）


Optimal Analysis for Determining the Dual-pin Length of Soil Moisture Probe
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    摘要:

    在兩針平行式探針結(jié)構(gòu)的阻抗模型的基礎(chǔ)上，進(jìn)一步理論推導(dǎo)了終端開(kāi)路式和終端短路式兩種類(lèi)型土壤水分傳感器探針長(zhǎng)度與阻抗特性的關(guān)系,。借助高頻分析軟件HFSS確定了兩針平行式土壤水分傳感器的最佳探針結(jié)構(gòu),，并采用有機(jī)溶液模擬土壤體積含水率進(jìn)行了試驗(yàn),，試驗(yàn)結(jié)果表明：終端開(kāi)路式和終端短路式土壤水分傳感器探針長(zhǎng)度在0~8.3cm時(shí),，其土壤體積含水率測(cè)量范圍達(dá)到0~100%,。

    Abstract:

    A detailed analysis was provided based on the port impedance theory. The relationship between probe length and impedance characteristics of soil moisture sensors as terminal open or terminal short was deduced. With the aim to verify the theoretical conclusion, the simulation method by using high frequency structure simulator software (HFSS) and the experiment associated with several organic solutions as references of known dielectric constants were conducted. After a number of experiments, the result showed that the measuring range of soil moisture sensors as terminal open or terminal short, when probe length was within 0~8.3cm, could be up to 0~100%.

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趙燕東,聶銘君.雙針結(jié)構(gòu)土壤水分傳感器探針最優(yōu)長(zhǎng)度分析與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(11):39-43. Zhao Yandong, Nie Mingjun. Optimal Analysis for Determining the Dual-pin Length of Soil Moisture Probe[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(11):39-43.

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