Design of data acquisition system for heat flow field of photoelectric pod

Photoelectric pod is one of the essential components of modern weapons. It can obtain accurate image information in real time in complex environment, which helps commanders to judge the battle situation quickly, so as to formulate more effective attack strategy. However, in the process of high-speed flight, the photoelectric pod will be subjected to strong airflow, which will lead to uneven temperature distribution inside and outside the pod, resulting in a certain heat flow field. In order to better understand the characteristics of heat flow field inside the photoelectric pod, it is necessary to design a set of data acquisition system to obtain key parameters such as temperature and airflow velocity inside the pod. This paper will introduce the design of this data acquisition system.

1. Objectives and principles

The goal of this system is to collect real-time data of heat flow field inside the photoelectric pod, including speed, temperature and pressure. To achieve this goal, we need to divide different locations inside the pod into several measuring points, and set up a sensor at each measuring point, which is used to sense the temperature, pressure and speed of the point. The data collected by the sensor is transmitted to the central control board through the communication module, and the central control board stores and processes the data and displays and analyzes the data through the data processing software, so as to obtain the heat flow field data inside the photoelectric pod.

2. Hardware design of data acquisition system

1, sensor selection and layout

This system uses a variety of sensors, including thermocouple, static pressure sensor, differential pressure sensor and wind speed sensor. The thermocouple is used to measure the temperature of various areas in the pod, the static pressure sensor and the differential pressure sensor are used to measure the pressure difference and differential pressure of the gas inside and outside the pod respectively, and the wind speed sensor is used to measure the airflow speed. When designing the layout of the sensor, it is necessary to select the most suitable position according to the characteristics of the photoelectric pod and the actual working situation.

2, Communication module

This system adopts Zigbee wireless communication module, which can realize wireless data transmission between two modules. In this system, the sensor module transmits the collected parameter data to the central control board through the communication module, realizing the seamless connection between data acquisition and transmission.

3, Design of center control board

The central control board is the core component of the system, which integrates, stores and processes the data collected by all sensors, and can analyze and display the data through data processing software. The center control board uses the ARM Cortex-A53 processor, which can process large amounts of data quickly and has high stability and reliability.

3. Software design of data acquisition system

The software of data acquisition system includes sensor driver, Zigbee communication program, data processing program and data display program. Among them, the sensor driver is responsible for receiving the data collected by the sensor, analyzing and processing it, and transmitting the processed data to the central control board; Zigbee communication program is responsible for controlling the data transmission between the sensor module and the central control board to ensure the reliability and stability of the data; The data processing program integrates and processes the original data collected by each sensor to obtain the heat flow field data in the pod; The data display program will display and analyze the processed data in graphs and tables to help users quickly understand the current changes in the heat flow field.

4. Conclusion

This paper introduces a system design scheme for heat flow field data acquisition of the photoelectric pod. The scheme realizes real-time acquisition and transmission of heat flow field data inside the pod by using a variety of sensors and Zigbee wireless communication module. The system has high stability and reliability in practical application. It is one of the more advanced heat flow field data acquisition systems of photoelectric pod.