The model M24 multifunctional static data acquisition instrument is a product based on the modular static data acquisition platform SPP-1. The acquisition instrument adopts an energy-efficient processor with an industrial-grade Cortex-A7 architecture, and balances power consumption and computing power at the same time to achieve lower power consumption and stronger data processing capabilities. The device adopts the Linux operating system, supports customized applications, supports mixed acquisition functions of five mainstream signals, supports optional customized functional modules,and supports various wired and wireless communication methods,making product application more convenient. The products are widely used in infrastructure health monitoring such as subway foundation pits, bridges, buildings, dams, and slopes etc.

Figure 1-1 Multi-function static data acquisition instrument network structure diagram.

Multi-function static data acquisition instrument is a product SPP-1 based on modular static data acquisition platform. It integrates measuring circuits of various signals such as vibrating string/RS485/voltage/current/bridge. Each channel of the equipment can be configured according to actual needs to collect signals of vibrating string/RS485/voltage/current/bridge sensors.

The external power interface of the equipment is connected to the mains or external photovoltaic system, and the built-in 2.2AH lithium battery is used as the UPS backup power supply of the equipment, which can provide the power supply for the equipment to continue to work in the event of sudden interruption of the external mains.

The equipment can set the acquisition cycle according to the requirements, and the minimum acquisition cycle is 5min. The device wakes up and collects once in each collection cycle, hibernates after collecting and uploading data, and waits for the next collection cycle to wake up again. This working mode greatly reduces the power consumption of the device and realizes low power consumption.

The device has a built-in large-capacity memory for backing up collected data (cyclic storage). When a network exception causes the device to fail to report the collected data in time, the device automatically saves the data and uploads the data when the network is normal. At the same time, the platform has a power display function, which can keep abreast of the working conditions of the equipment.

Product functional characteristics

• Support up to 24 channels, each channel can be configured to measure one of the five signals of vibrating wire/voltage/current/bridge/RS485;
• The built-in 2AH lithium battery is used as the UPS backup power supply. After the external power failure, it can ensure that the equipment continues to work for a period of time, and at the same time report the power failure information to the platform;
• Based on the modular platform design, by replacing the measurement module, the customized function can be realized, and it can be widely compatible with various sensors. At the same time, it supports OTA remote firmware upgrade function to realize customized algorithm upgrade;
• Support Ethernet, fully isolated RS485 wired communication and 4G wireless communication, and support GPS\WIFI\BT\LoRaWAN\NB-IoT module optional;
• Fully isolated RS485 communication interface, sensor interface surge protection, power supply anti-reverse connection, over-current prevention, and over-voltage release to improve interface reliability and safety;
• Use a dedicated key to authenticate the chip to protect the core logic and key algorithms of the device. At the same time, device rights management can be carried out for special applications of products to protect the rights and interests of product owners;
• It supports magnetic quick installation and quick release or hanging ear fixing (need to configure a small chassis), which is fast and convenient, suitable for most installation scenarios; supports local and platform configuration, and can be put into use quickly.

Application scenarios：

• Bridge structure health monitoring
• Building structure health monitoring
• Smart city\Infrastructure monitoring
• Mine structure health monitoring
• Dam structure health monitoring
• Pipline monitoring