Design of vigor detection device for batch seeds based on TDLAS

doi:10.3785/j.issn.1006-754X.2022.00.029

Chin J Eng Design

2022, Vol. 29

Issue (2): 231-236 DOI: 10.3785/j.issn.1006-754X.2022.00.029

Whole Machine and System Design

Design of vigor detection device for batch seeds based on TDLAS

Yun-jie XU^1,²(

),Yu SHEN¹,Fei HU¹,Liang-quan JIA¹,Heng-nian QI¹(

)

^1.School of Engineering, Huzhou University, Huzhou 313000, China
^2.Huzhou Mechanical Engineering Society, Huzhou 313000, China

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Abstract

In view of the lack of research on vigor detection device for batch seeds in China and the irreversible damage to seed samples caused by traditional detecting methods, a non-destructive detecting method using tunable diode laser absorption spectroscopy (TDLAS) technology to detect seed respiration intensity to determine its vigor level was proposed, and a detection device was designed to realize the batch detection of seed vigor. Firstly, the overall structure of the vigor detection device for batch seeds was designed, and the process flow and requirements of feeding?detection?sorting?reset were determined. Then, the structural design of the key component, the seed box, was carried out, at the same time, its internal optical path was theoretically designed, and the optical path was simulated and analyzed by the Zemax optical design software. And then, the software and hardware design for the detection device control system was carried out. Finally, a detection device prototype was built up, and the feeding, detecting and sorting tests were conducted. The test results showed that the designed vigor detection device prototype for batch seeds had good stability, and its comprehensive success rate was 96.67%. The research result can provide a reference for the commercialization and marketization of the vigor detection device for batch seeds.

Key words： tunable diode laser absorption spectroscopy (TDLAS) technology seed vigor batch detection optical design

Received: 28 May 2021 Published: 06 May 2022

CLC:

TH 122

Corresponding Authors: Heng-nian QI E-mail: 02455@zjhu.edu.cn;02466@zjhu.edu.cn

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	Yun-jie XU
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Cite this article:

Yun-jie XU,Yu SHEN,Fei HU,Liang-quan JIA,Heng-nian QI. Design of vigor detection device for batch seeds based on TDLAS. Chin J Eng Design, 2022, 29(2): 231-236.

URL:

https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2022.00.029 OR https://www.zjujournals.com/gcsjxb/Y2022/V29/I2/231

基于TDLAS的批量种子活力检测装置设计

针对我国缺乏对批量种子活力检测装置的研究，以及传统检测方法可能会对种子样品造成不可逆损伤的问题，提出了一种通过可调谐半导体激光吸收光谱（tunable diode laser absorption spectroscopy， TDLAS）技术检测种子呼吸强度来判定其活力等级的无损检测方法，并设计了相应的检测装置，以实现对种子活力的批量检测。首先，从整体上设计了批量种子活力检测装置的结构，确定了上料—检测—分选—复位的工艺流程和要求。然后，对该检测装置的关键部件——种子盒进行了结构设计，同时对其内部光路进行了理论设计，并结合Zemax光学设计软件对内部光路进行了仿真分析。接着，对该检测装置控制系统的软、硬件进行了设计。最后，搭建了检测装置样机，并开展了上料、检测和分选试验。试验结果表明，所设计的批量种子活力检测装置样机的稳定性较好，其综合成功率达96.67%。研究结果可为批量种子活力检测装置的商品化和市场化提供参考。

关键词： 可调谐半导体激光吸收光谱（TDLAS）技术, 种子活力, 批量检测, 光学设计

Fig.1 Overall structure of vigor detection device for batch seeds

Fig.2 Schematic diagram of seed box structure

Fig.3 Schematic diagram of reflection principle of White pool

Fig.4 Schematic diagram of internal optical path reflection of optical absorption cell in seed box

Fig.5 Spot produced on the large concave spherical mirror after 40 times of laser reflection

Fig.6 Principle of pneumatic control system of vigor detection device for batch seeds

Table 1 I/O distribution of control system of vigor detection device for batch seeds

Fig.7 Hardware wiring of control system of vigor detection device for batch seeds

Fig.8 PLC program sequential function chart of control system of vigor detection device for batch seeds

Fig.9 Prototype of vigor detection device for batch seeds


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