| Marine sediment sampling and measurement will change the temperature, pressure and other parameters of the sediment, and the data obtained by sampling and measurement will be different from the real parameters of the sediment. Marine sediment sampling and measurement will change the temperature, pressure and other parameters of the sediment, and the data obtained by sampling and measurement will be different from the real parameters of the sediment. In view of the above problems, this paper carried out research on the thermal, electrical and acoustic detection technology of Marine sediments, and designed an in−situ thermal, electrical and acoustic multi−parameter probe of Marine sediments suitable for deep−sea submersible. The probe used the time difference method to measure the sound velocity and sound attenuation coefficient in the sediment, the Wenner method to measure the conductivity parameters of the sediment, and the NTC thermistor as a temperature sensor to measure the temperature of the sediment. Sandy sediments were measured after probe calibration. The experimental results show that the acoustic velocity of the sediment samples is 1588.1m/s and the acoustic attenuation coefficient is 2.5dB/m. The standard error of the probe is less than 2.8%. The temperature measurement error is less than 0.28℃, and the temperature measurement time is not less than 120 seconds. The experimental results show that the probe can accurately and quickly measure the thermal, electrical and acoustic parameters of Marine sediments. In view of the above problems, this paper carried out research on the thermal, electrical and acoustic detection technology of Marine sediments, and designed an in−situ thermal, electrical and acoustic multi−parameter probe of Marine sediments suitable for deep−sea submersible. The probe used the time difference method to measure the sound velocity and sound attenuation coefficient in the sediment, the Wenner method to measure the conductivity parameters of the sediment, and the NTC thermistor as a temperature sensor to measure the temperature of the sediment. Sandy sediments were measured after probe calibration. The experimental results show that the acoustic velocity of the sediment samples is 1 737.5 m/s and the acoustic attenuation coefficient is 2.5 dB/m. The standard error of the probe is less than 2.8 %. The temperature measurement error is less than 0.28 ℃, and the temperature measurement time is not less than 120 s. The experimental results show that the probe can accurately and quickly measure the thermal, electrical and acoustic parameters of Marine sediments. |
