Remote concrete strength determination system

Claims

1. A system for remotely determining the strength of concrete, comprising at least two sensors placed in a concrete structure, configured to measure at least the parameters of relative humidity and temperature of the concrete, storing the results of the measurements and receiving / transmitting information from / to a base station, a base station for periodically receiving the measured parameters from said sensors with subsequent transmission of these measured parameters to a remote server connected to the base station and to at least one user device, wherein the server comprises a communication module for communicating with the base station and with at least one user device, a processing and control module connected to the communication module and to a database module that contains a set of calibration data, wherein the processing and control module is configured to receive the measured parameters from the base station,determining the current concrete strength of a concrete structure based on the measured parameters and calibration data and providing at least one user with an interface containing information about the current concrete strength of the concrete structure.

2. The system according to paragraph 1, characterized in that the sensor contains a battery and a printed circuit board placed in a sealed radio-transparent housing, on the printed circuit board are placed at least a processor, memory, a communication module, an omnidirectional antenna, a humidity sensor, a temperature sensor, contacts for connecting power from the battery.

3. The system according to paragraph 2, characterized in that the sensor housing has openings on one side for filling the internal volume of the housing with a compound, which is a three-component epoxy rubber compound.

4. The system according to paragraph 2, characterized in that the housing has an opening closed by a membrane that allows water vapor to penetrate into the housing, but prevents liquid water and dirt from penetrating into the housing, wherein the membrane is made of extruded fluoroplastic (ePTFE) with a thickness of at least 0.5 mm and a porosity of at least 50%.

5. The system according to paragraph 2, characterized in that the omnidirectional antenna and the communication module are located on opposite sides of the printed circuit board.

6. The system according to paragraph 1, characterized in that the sensors are placed in a concrete structure at a depth of no more than 15 cm.

7. The system according to claim 2, characterized in that a sealed input is additionally made in the housing of at least one sensor, through which a cable is connected to the printed circuit board at one end, at the other end of which an additional sensor with a communication module is located.

8. The system according to paragraph 7, characterized in that the sensors are placed in a concrete structure at a depth of more than 15 cm.

9. The system according to claim 1, characterized in that at least one of the sensors is configured to receive a signal from the base station for remotely disabling the sensor.

10. The system according to paragraph 1, characterized in that in the absence of measurement information from any of the sensors, the determination of the current strength of concrete is carried out without taking into account such information from this sensor.

11. The system according to paragraph 2, characterized in that the housing is made of two halves connected to prevent their displacement relative to each other.

12. The system according to paragraph 1, characterized in that the exchange of information between the sensors and the base station is carried out using protocols selected from: LoRaWAN, Bluetooth, BLE, ANT, Wi-Fi, ZigBee, NB-IOT.