Local monitoring pressure sensitive cement base stress and strain sensor of concrete structure
A concrete structure and strain sensor technology, applied in the field of sensors, can solve the problems of single measurement parameters and low measurement accuracy, and achieve the effects of high embedding survival rate, high sensitivity and good compatibility
Inactive Publication Date: 2007-10-10
HARBIN INST OF TECH
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[0003] The present invention provides a pressure-sensitive cement-based stress and strain sensor for local monitoring of concrete structures in order to solve the problems of low measurement accuracy and single measurement parameters in current local monitoring sensors for concrete structures.
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specific Embodiment approach 2
[0007] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the conductive material is composed of chopped carbon fiber and carbon fiber powder, and the components of chopped carbon fiber and carbon fiber powder are in a weight ratio of 1-2:1-2.
specific Embodiment approach 3
[0008] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the conductive material is composed of carbon fiber powder and carbon black, and the weight ratio of carbon fiber powder and carbon black is 1-2:1-2.
specific Embodiment approach 4
[0009] Embodiment 4: The difference between this embodiment and Embodiment 1 is that the conductive material is composed of carbon black and chopped carbon fibers, and the components of carbon black and chopped carbon fibers are 1-2:1-2 by weight.
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A stress and strain transducer for monitoring pressure-sensitive cement base in concrete structure is prepared for fixing four mesh metal electrodes in parallel mode in pressure-sensitive cement base, leading each metal electrode out of external surface of said base by wire, setting pressure-sensitive cement base material to be mixture of conduction material and cement material, exerting DC voltage between two mesh metal electrodes at external side, measuring voltage between tow mesh metal electrodes at internal side and setting up relation curve of voltage to pressure stress and strain for realizing monitor on pressure-sensitive cement base.
Description
technical field [0001] The invention relates to a sensor, in particular to a sensor for monitoring local stress and strain of a concrete structure. Background technique [0002] At present, strain gauges are widely used in civil construction to monitor the strain of concrete structures. Due to the high cost of strain gauges, complicated installation processes, poor compatibility with concrete, and poor durability, long-term accurate monitoring cannot be achieved. Although there are devices that use concrete sensing elements to monitor parameters of concrete structures recently, there are still problems such as low measurement accuracy and single measurement parameters. SUMMARY OF THE INVENTION [0003] The invention provides a pressure-sensitive cement-based stress and strain sensor for local monitoring of concrete structures in order to solve the problems of low measurement accuracy and single measurement parameters of the current local monitoring sensors of concrete stru...
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IPC IPC(8): G01L1/18G01B7/16
Inventor 欧进萍韩宝国关新春
Owner HARBIN INST OF TECH
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