Abstract：In order to solve the problem of monitoring the uneven settlement of building structures in engineering, this paper takes the communication device as the basic theory and proposes a wireless static level system design based on LTE CAT-1, which is based on the embedded real-time operating system (FreeRTOS). The system is divided into three parts: data acquisition terminal, data base station, and client. The data collection terminal is mainly composed of pressure sensor, ZigBee terminal and Cortex-M3 microcontroller. We establish a number of data acquisition nodes using ZigBee. The data base station consists of a ZigBee coordinator, a Cortex-M3 microcontroller, a Wi-Fi module, and LTE Cat-1. The ZigBee coordinator collects data from multiple terminals. Users can view the data on-site by connecting the device Wi-Fi via PC or mobile terminal. The client is mainly designed for the quality inspection center or the personnel engaged in the municipal engineering industry, convenient to view the on-site test results and prevent the data from being untrue. The field test results show that the system can complete the collection and stable upload of settlement data, and the measurement accuracy reaches millimeter level.
