In the last decades various internal refrigeration or heating equipment has been developed mainly for a specific use, such as refrigerators air conditioning and freezers each with technology for temperature control. The incubators greenhouses were originally developed to incubate long-lasting biochemical oxygen demand (BOD) tests. The objective of this work was to build a low-cost BOD incubator and to technically evaluate temperature control through an adjustment to the electrical current in the system supply in addition to wireless monitoring. The project consisted of the dimensioning and projection of the materials for the refrigeration system, the realization of the algorithm that connects the physical part with the logical part of the system, with the development of hardware and software using Arduino to the 3D mechanical part. with the construction of the incubator for the validation of the complete system. It is concluded that the use of thermoelectric TEC1-12706 was possible with the variables presented for the cooling of a small volume. Thus, the prototype of the BOD incubator achieved a minimum temperature of 13 C and maximum of 40 C with an approximate error of 0.2 C. Our BOD system presented an excellent control system through a smartphone that helps in experiments in the laboratory to guarantee the ideal temperature. In addition, the incubator is inexpensive portable and lightweight.

中文翻译：

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基于热电效应的生化需氧量培养箱原型开发及监控系统


在过去的几十年中，主要针对特定​​用途开发了各种内部制冷或加热设备，例如冰箱、空调和冰柜，每种设备都具有温度控制技术。培养箱温室最初是为了培养持久的生化需氧量 (BOD) 测试而开发的。这项工作的目标是建造一个低成本的 BOD 培养箱，并通过调整系统电源中的电流以及无线监控来技术评估温度控制。该项目包括制冷系统材料的尺寸标注和投影、连接系统物理部分和逻辑部分的算法的实现，以及使用 Arduino 开发 3D 机械部分的硬件和软件。建造孵化器以验证整个系统。结论是，通过为小体积冷却提供的变量，可以使用热电 TEC1-12706。因此，BOD 培养箱的原型实现了最低温度 13°C、最高温度 40°C，误差约为 0.2°C。我们的 BOD 系统通过智能手机提供了出色的控制系统，有助于实验室实验保证理想的结果。温度。此外，该培养箱价格便宜、便于携带且重量轻。