Temporary power supply
during the implementation of the automated monitoring system for surrounding
rock deformation in the excavation area of a construction tunnel is difficult.
To address this issue, a low-power
design technology is used in the on-site data
acquisition terminal. Low-power hardware and software
design strategies are employed to develop and design a set of data acquisition
terminal suitable for tunnel construction sites, this terminal meets the long-term battery power supply requirements. Laser sensors are easily
obstructed by large construction equipment on site during the measurement of
convergence deformation of surrounding rocks, which affects measurement
accuracy. Thus, the collection cycle is dynamically adjusted. When real-time data exceeds the normal reading threshold, the data collection
frequency is increased to ensure timely acquisition of effective on-site data after obstacles are removed. Furthermore, a low-power design strategy of time-sharing and on-demand power supply is adopted, and the operation and shutdown time
of each circuit unit and sensor are determined based on the effectiveness of
real-time data, avoiding simultaneous running of all
circuit units. The experimental results show that: (1) The power supply
strategy based on time-sharing and on-demand reduces energy consumption by approximately 20% compared to
general automated monitoring systems; (2) The collaborative control strategy
based on dynamic frequency modulation and low power consumption effectively
reduces energy consumption while increasing data acquisition frequency,
achieving high efficiency and energy conservation in data acquisition.
WANG Qingling
,
XU Minjian
,
GUO Hongyan
.
Design of Monitoring Terminal for Surrounding Rock Structure Based on Dual Strategy of Low Power Consumption and Dynamic
Frequency Modulation
[J]. Tunnel Construction, 2024
, 44(S2)
: 152
-158
.
DOI: 10.3973/j.issn.2096-4498.2024.S2.016
