Remote monitoring system for geothermal resource exploitation

Remote monitoring system for geothermal resource exploitationcommunication network

TD-016C low-power acquisition terminal, supporting signals from both China Telecom and China Mobile networks; Supports 2G/3G/GPRS/CDMA 5-band 800/850/1700/1900/2100 MHz.

1. Monitoring terminal

① Portable structural design, the collector and sensor adopt an integrated design concept, and are connected to the stainless steel waterproof box using a nut type installation mode, without the need for any installation tools. The installation time is less than 1 minute to enter the normal monitoring state.

② 256 * 128 high-definition dot matrix display screen, which can display sensor data status, system status, communication status, data upload status, etc. in real time.

③ Small in size and light in weight, the overall weight of the core part does not exceed 3KG, making it convenient for users to carry the instrument to harsh environments for use. It has high measurement accuracy, reliable stability, and can be observed handheld according to usage needs.

④ Low power consumption, green energy-saving design, internal energy-saving mode design. If powered by solar panels, it can ensure long-term use in areas without electricity; It can also be powered by mains or automotive power sources. The external structure is designed to withstand harsh environments, which does not affect the efficiency of the instrument under adverse weather conditions. It can continue to work continuously in thunderstorms, wind and snow environments. The dustproof and moisture-proof levels meet national standards.

⑤ The data collection density can be set according to observation needs within 1-60 minutes.

⑥ Built in large capacity data storage, capable of continuously storing 3000000 pieces of data; It can be expanded to 64G storage capacity according to monitoring needs, achieving data storage without *.

⑦ Multiple communication methods can be used to read data from devices such as PDAs and laptops on site through standard communication interfaces such as RS232/RS485/USB. Local long-distance (≤ 1000 meters) 485 data communication can also be achieved, with NB iot mode configured by default at the factory.

⑧ The external sensing layer sensors of each observation point can be optionally selected according to the actual needs of the user, and can also be customized for production according to other customer requirements.

Remote monitoring system for geothermal resource exploitationUsing soil as a heat source or sink for buried pipe heat exchangers to provide heating and cooling to buildings The thermal conductivity of soil is an important parameter in the design of buried pipe heat exchangers Long term and reliable monitoring of ground temperature is particularly important. When measuring the soil thermal conductivity on site, the testing time should be long enough. The temperature of the fluid inlet and outlet and different depths after the working conditions are stable during testing will affect the accuracy of the test results. Therefore, the design of buried temperature measurement cables is particularly important. Compared to traditional temperature measurement cable design methods, single bus temperature measurement cables are widely used for ground temperature monitoring in buried pipes and ground source heat pump systems due to their advantages of convenient wiring, high accuracy, environmental resistance, and high cost-effectiveness. Their reliability and stability have been verified and achieved good results in many engineering projects.

The collection server connects the field to the temperature collection module through a bus, and the temperature collection module sends the data collected by each temperature sensor to the bus through a single bus. Each acquisition module can be connected to a temperature measurement cable with 1-60 built-in temperature sensors. This scheme can provide real-time temperature monitoring for large-scale test sites, supporting online temperature monitoring for 180 wells or temperature measurement cables, as well as observation wells with more than 1500 points.