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Dual-source dual-probe orthogonal device for measuring water content by microwave and measurement method

A technology of microwave measurement and moisture content, which is applied in the direction of using microwave to measure moisture content, etc., can solve the problem that it is difficult to balance the measurement range and measurement accuracy

Inactive Publication Date: 2009-10-28
TSINGHUA UNIV
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Problems solved by technology

[0016] In practical industrial applications, with the different types of coal, particle size, moisture content, and thickness, the range of variation in the microwave absorption rate of the medium is very large. If only a single frequency microwave is used, it will be difficult to take into account the measurement range and measurement accuracy

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  • Dual-source dual-probe orthogonal device for measuring water content by microwave and measurement method
  • Dual-source dual-probe orthogonal device for measuring water content by microwave and measurement method
  • Dual-source dual-probe orthogonal device for measuring water content by microwave and measurement method

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Embodiment Construction

[0027] The invention provides a dual-source and double-probe orthogonal microwave moisture content measurement device and measurement method for microwave transmission coal moisture content measurement on a coal conveyor belt. figure 1 Shown is a schematic diagram of the microwave transmission coal moisture content measurement used on the coal conveyor belt. The device includes a 9.4GHz microwave signal source 101, a 2.4G microwave signal source 103, a 9.4GHz detector 106, a 2.4GHz detector 108, a 9.4GHz transmitting antenna 102, a 9.4GHz receiving antenna 105, a 2.4GHz transmitting antenna 104, and a 2.4GHz Receiving antenna 107, data acquisition card 110 and computer 111. 9.4GHz transmitting antenna 102 and 2.4GHz transmitting antenna 104 are installed side by side along the coal conveying direction above the coal conveyer belt 109, and respectively with 9.4GHz microwave signal source 101 and 2.4GHz microwave signal source 103 is connected, 9.4GHz receiving antenna 105 and 2...

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Abstract

The invention discloses a dual-source dual-probe orthogonal device for measuring water content by microwave and a measurement method, belonging to the technical field of microwave measurement; the device is used for measuring the water content of coals on a coal conveyor belt by a microwave transmission way. The device comprises emitting antennas of 9.4GHz and 2.4GHz; the emitting antennas are arranged above the coal conveyor belt in parallel along the conveying direction of the coal and are connected with a microwave signal source with the same frequency respectively; the device also comprises two receiving antennas of 9.4GHz and 2.4GHz; the two receiving antennas are arranged below the coal conveyor belt and are connected with a radiodetector with the same frequency respectively; the device also comprises the radiodetectors of 9.4GHz and 2.4GHz; the two radiodetectors are connected with a data collecting card; and the data collecting card uploads the collected microwave power signals to a computer in which a suitable processing program is installed, thus obtaining the real-time water content of the coals on the conveyor belt. The device and the method can improve the measurement range, improve the measurement precision simultaneously, overcome the contradiction between the measurement range and the measurement precision of the traditional method, effectively eliminate mutual interference and meet the requirement of dynamic measurement.

Description

technical field [0001] The invention belongs to the technical field of microwave measurement. In particular, the utility model relates to a dual-source and double-probe orthogonal microwave moisture content measurement device and measurement method for microwave transmission coal moisture content measurement on a coal conveyor belt. Background technique [0002] The moisture content of coal is an important indicator in coal production, trade, processing utilization and scientific research, which affects the calorific value and price of products. In the study of soft sensor method for coal calorific value detection, moisture content, like ash content, is an important index, which affects the accuracy of calorific value measurement. Therefore, developing a reliable and accurate online coal moisture measurement method is one of the key points to improve the efficiency of the coal preparation industry. [0003] There are two main types of moisture in coal: one is extrinsic moi...

Claims

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Application Information

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IPC IPC(8): G01N22/04
Inventor 陆耿徐文立王焕钢曹丽
Owner TSINGHUA UNIV
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