Online deep dynamic level-temperature measuring system for geothermal well

A geothermal water well and temperature measurement technology, applied in thermometers, measuring devices, measuring heat, etc., can solve the problems that liquid level changes cannot be realized, the diameter of the sensing wire is large, and online measurement cannot be achieved.

Inactive Publication Date: 2011-04-06
TIANJIN GEOTHERMAL EXPLORATION & DEV DESIGNING INST
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Problems solved by technology

[0003] At present, the liquid level gauge of the water measuring well generally adopts the manual or servo motor off-line method, which cannot achieve the purpose of online measurement. The liquid level measurement based on the principle of silicon pressure sensor is used because of the bending of th

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  • Online deep dynamic level-temperature measuring system for geothermal well
  • Online deep dynamic level-temperature measuring system for geothermal well
  • Online deep dynamic level-temperature measuring system for geothermal well

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Embodiment Construction

[0015] This invention is achieved like this.

[0016] An online geothermal well deep dynamic liquid level-temperature measurement system, the temperature sensors 1-5 installed in the geothermal well are connected to single-chip microcomputers 1-6; The constant current source 1-2, the other end of the platinum nickel-chromium iron alloy wire 1-1 is connected to the digital-analog converter 1-4; the constant current source is connected to the constant current source switching time controller 1-3, the digital-analog converter 1-4 and the constant current source The flow source switching time controller is connected to the single-chip microcomputer 1-6.

[0017] Platinum-nickel-chromium-iron alloy wire has a positive temperature coefficient and high thermal response speed. Place it in air and liquid, and pass a constant current to the platinum-nickel-chromium-iron alloy wire through the constant current source under the control of the switching time controller. Since the thermal ...

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Abstract

The invention relates to an online deep dynamic level-temperature measuring system for a geothermal well, a temperature sensor arranged in the geothermal well is connected as a singlechip. One end of a platinum nickel chrome ferroalloy wire arranged in the geothermal well is connected with a constant flow source while the other end thereof is connected with a digital to analog converter. The constant flow source is connected with a constant flow source switch time controller and the digital to analog converter and the constant flow source switch time controller are connected with the singlechip. The platinum nickel chrome ferroalloy wire has positive temperature coefficient and great thermal response speed. A constant flow is introduced to the platinum nickel chrome ferroalloy wire under control of the constant flow source switch time controller so that temperature change, resistance change and voltage variation in the upper and lower parts of the platinum nickel chrome ferroalloy wire are different because the thermal resistance of air is far greater than that of liquid. Therefore, level variation can be measured through the digital to analog converter, the temperature sensor and the singlechip and actual liquid and temperature of liquid can be measured through calibration and least square regression.

Description

technical field [0001] The invention belongs to a dynamic measurement system, in particular to an online geothermal water well depth dynamic liquid level-temperature measurement system. Background technique [0002] The significance of online deep dynamic liquid level-temperature measurement of geothermal wells is to protect the normal operation of submersible electric pumps and avoid damage to submersible electric pumps due to air pumping. More importantly, it is to monitor the liquid level data of geothermal wells for a long time to provide for the balance of recharge. reliable data. [0003] At present, the liquid level gauge of the water measuring well generally adopts the manual or servo motor off-line method, which cannot achieve the purpose of online measurement. The liquid level measurement based on the principle of silicon pressure sensor is used because of the bending of the long-distance atmospheric conduit, which makes the long-distance measurement 200- The liqu...

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Application Information

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IPC IPC(8): G01F23/24G01K7/18
Inventor 林黎韩金树孙宝成王幼军程万庆赵苏民李俊曾梅香田光辉于建水孙世文张月菊王坤王光辉郭澎
Owner TIANJIN GEOTHERMAL EXPLORATION & DEV DESIGNING INST
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