Micro sensor applied to detection of nitrogen, phosphorus and potassium in soil

A detection sensor, nitrogen, phosphorus and potassium technology, applied in the field of detection sensors, can solve the problems of many samples to be tested, large volume, high equipment maintenance cost, and achieve the effects of improving portability, good repeatability and low production cost

Inactive Publication Date: 2015-02-04
TSINGHUA UNIV
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Problems solved by technology

[0004] Traditional nitrogen, phosphorus and potassium detection sensors have problems such as huge volume, complex optical system, more samples to be teste...

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  • Micro sensor applied to detection of nitrogen, phosphorus and potassium in soil
  • Micro sensor applied to detection of nitrogen, phosphorus and potassium in soil

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Embodiment Construction

[0011] The miniaturized soil nitrogen phosphorus potassium detection sensor that the present invention proposes, its structure is as follows figure 1 As shown, it includes a photoelectric sensor 7 , a package protection layer 1 , a liquid channel layer 2 , a support layer 3 , an on-chip light source 11 and a printed circuit board layer 4 . The encapsulation protection layer 1 , the liquid channel layer 2 , the support layer 3 and the printed circuit board layer 4 are sequentially laminated together. The photoelectric sensor 7 is encapsulated in the central bottom of the encapsulation protection layer 1, and the two sides of the encapsulation protection layer 1 are respectively provided with a liquid inlet hole 5 and a liquid outlet hole 8. A fluid flow channel 9 is processed on the liquid flow channel layer 2, and both sides of the liquid flow channel 9 are respectively connected with the liquid inlet hole 5 and the liquid outlet hole 8 on the packaging protection layer. The ...

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Abstract

The invention relates to a micro sensor applied to detection of nitrogen, phosphorus and potassium in soil, belonging to the technical field of detection sensors. The sensor is characterized in that an encapsulation protection layer, a liquid flow channel layer, a support layer and a printed circuit board layer are sequentially superposed, wherein a photoelectric sensor is encapsulated in the encapsulation protection layer; a liquid inlet hole and a liquid outlet hole are respectively formed in two sides of the encapsulation protection layer; a fluid flow channel is processed in the liquid flow channel layer and is respectively connected with the liquid inlet hole and the liquid outlet hole; an on-chip light source is encapsulated in the support layer; an operational amplifier, a microprocessor and a liquid crystal display screen are distributed on the printed circuit board layer. According to the sensor, micro chips are adopted by the light source and the photoelectric sensor; just dozens of microliters of to-be-detected liquid is required; a nutrient detector used in the traditional agriculture is shrunk to be 1/1000 of the original volume, so that convenience for detection of nitrogen, phosphorus and potassium is greatly improved; the manufacture cost of the device is greatly reduced; the micro sensor can be applied to large-scale batch production and has the advantages of being high in repeatability and high in stability.

Description

technical field [0001] The invention relates to a miniaturized soil nitrogen, phosphorus and potassium detection sensor, which belongs to the technical field of detection sensors. Background technique [0002] Nowadays, with the development of economy, society and information industry, agricultural informatization has been gradually popularized. Accurate, rapid and real-time collection of soil nitrogen, phosphorus and potassium information is a necessary condition to ensure agricultural development. Among them, the highly stable nitrogen, phosphorus and potassium sensor is the core component to ensure accurate collection of nitrogen, phosphorus and potassium information. [0003] In traditional agriculture, NPK testing is usually done manually. First, the soil samples are sampled and pretreated, and then analyzed with large-scale equipment, which poses a serious challenge to the convenience of soil nitrogen, phosphorus and potassium detection. [0004] Traditional nitroge...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 任天令陶璐琪杨轶刘瑞涛刘博
Owner TSINGHUA UNIV
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