A system and method for multiplexing measurement ports of multiple types of sensors

Abstract

The invention belongs to the technical field of sensor instrument measurement, and discloses a multi-type sensor measurement port multiplexing system and method. By switching relays, the excitation source and the measurement module are respectively connected to the excitation bus E+, E- and the measurement bus M+, M- and according to the needs of the sensor, connect the sensor to the excitation bus E+, E- and the measurement bus M+, M-; according to the type of the sensor, set the corresponding parameters in the memory of the microprocessor, according to the type of sensor connected to the port , and perform corresponding excitation and measurement. The present invention integrates a variety of excitation sources by designing a set of circuits, and realizes port multiplexing of the sensor interface by switching different excitation sources according to different types of external sensors, that is, the same interface can be connected to various types of sensors; The invention greatly simplifies the installation complexity on site, simplifies the system structure and maintenance difficulty, and saves investment cost.

Description

technical field [0001] The invention belongs to the technical field of sensor instruments, and in particular relates to a multiplexing system and method for measurement ports of multiple types of sensors. Background technique [0002] Currently, the closest prior art: [0003] Water conservancy is the lifeblood of the national economy. With the development of science and technology and the improvement of people's living standards, a large number of water conservancy projects have been built to meet the needs of flood prevention and drought relief, optimized water resource scheduling and clean energy. The safety of the operation of these water conservancy projects is one of the priorities of the management department's daily supervision work. [0004] In the safety monitoring of water conservancy projects, in order to obtain comprehensive engineering safety information, a large number of sensors are used to obtain information such as seepage, leakage, stress, strain, tempera...

AI Technical Summary

Problems solved by technology

However, in real engineering, there are many types of sensors, and the number of sensors of each type is also different. In order to measure these sensors, corresponding measuring equipment needs to be installed. In order to cater to this situation, one situation is to gather the same type of sensors to A large number of cables are generated at one measuring device, and cable trenches need to be excavated. If the cable is too long, it may easily cause signal interference. The number of sensors is large, the measurement interface is not enough, and multiple devices are needed, while the number of other types of sensors is small, and even one type of sensor has only one sensor, and multiple interfaces are pre-set on the device, so redundant ports cause waste, resulting in The entire monitoring system is complex, with poor compatibility, reduced availability, and difficult maintenance, resulting in high project investment costs and high post-maintenance costs, which bring great inconvenience to the reliable operation of the project

[0006] To sum up, one set of measuring equipment is used for one type of engineering quantity, and a large number of different types of sensors at the same location requires the installation of multiple sets of different types of measuring equipment, resulting in a complex structure of the entire monitoring system, great difficulty in installation, and different types of sensors. The communication protocols of the manufacturers of the measurement equipment are inconsistent, and the integration of the back-end acquisition software is difficult, resulting in high investment costs

The monitoring system has complex structure, difficult installation, poor compatibility, reduced usability, difficult maintenance, high investment cost, and high post-maintenance cost

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