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| Development of the NB-IoT-based measurement and control software for broadband SIP response testers for rock and ore specimens |
HOU Sheng-Lan1,2( ), CHEN Ru-Jun1,2,3,4(), WANG Zi-Hui1,2, LIU Zhi-Tong1,2, LIU Jin1,2 |
1. School of Geoscience and Info-Physics, Central South University, Changsha 410083,China
2. AIoT Innovation and Entrepreneurship Education Center for Geology and Geophysics, Central South University, Changsha 410083,China
3. The Key Laboratory of Nonferrous Metal Mineralization Prediction and Geological Environment Detection of Ministry of Education, Changsha 410083,China
4. Hunan Key Laboratory of Non-ferrous Resources and Geological Disaster Exploration, Changsha 410083,China |
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Abstract Spectral induced polarization (SIP) response testers for rock and ore specimens determine the SIP response differences between ore bodies and host rocks by measuring the SIP characteristics of rock and ore specimens, thus providing a basis for ore prospecting. They are widely used in geophysical exploration. However, the existing SIP response testers have shortcomings in terms of bandwidth, intelligence, portability, and power consumption. Given this, this study developed a piece of measurement and control software for SIP response testers based on the Internet of Things (IoT) techniques including NB-IoT, Bluetooth, and Wifi, realizing the functions such as near-field communication, cloud communication, data visualization, and data processing. The test results verify that the software can achieve the desired effect owing to its easy operation, stable running, and friendly man-machine interaction.
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Received: 27 September 2021
Published: 03 January 2023
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Corresponding Authors:
CHEN Ru-Jun
E-mail: 1875565461@qq.com;chen.rujun@foxmail.com
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Schematic diagram of complex resistivity measurement for rock and ore specimen
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Overall structure diagram of measurement and control system
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Instruction protocol parsing format diagram
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| 类型 | 描述 | | | Object | String | 标本名 |
属性 | Resistivity | String | 电阻率 | | Phase | String | 相位 | | Frequency | String | 频率 |
命令 | Status | String | 仪器状态 | | Config | String | 配置指令 |
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Product attributes and commands
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The main flow chart of the Android App
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信号频率
f1/Hz | 采样频率
f2/Hz | 采样时间
t/s | 采样点数
(N=f2×t) | 频率分辨率
(r=f2/N) | | f1>50000 | 1250000 | 0.0032 | 4000 | 312.500 | | 50000≥f1>5000 | 625000 | 0.0064 | 4000 | 156.250 | | 5000≥f1>1000 | 312500 | 0.0128 | 4000 | 78.125 | | 1000≥f1>100 | 156250 | 0.5000 | 78125 | 2.000 | | 100≥f1≥1 | 78125 | 1.0000 | 78125 | 1.000 |
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Relationship among sampling frequency, sampling points and signal frequency
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User interface of short-rang control(a),parameter setling(b) and remote control(c) in Android App for SIP tester for rock and ore specimens
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SIP response of chalcopyrite specimen and its photo
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Photo of schist(a) and its SIP response(b)
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