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★ liquid-solid two-phase flow measurement
In the use of electromagnetic technology to measure the flow of liquid-solid two-phase flow applications, mainly involves the following two aspects of the problem:
1, Due to the noise interference signal generated by the rubbing electrode of the solid material (related to the concentration), the measurement accuracy and stability caused by the magnetic field interference of the magnetically conductive object. Different technical routes have different abilities to solve this problem. Because of the low sampling rate, square wave excitation technology can not fundamentally solve the above problems and can only be improved by adjusting the excitation frequency and software algorithms to meet the requirements of the equipment under certain conditions (fixed medium, fixed concentration) , Different equipment manufacturers to improve the effect of a certain difference; frequency AC excitation technology should be high sampling frequency (microsecond level), curve reduction technology can completely remove the above two types of interference, to ensure accurate, stable, real-time organic unity.
2, due to the working conditions of the sensor lining damage caused by equipment life issues. Liner life by the solid form (particle size, sharpness), flow rate, pressure, lining material, lining production process and other factors. For media containing sharp objects (such as coarse sand, coral reefs, gravel, pebbles, rocks, etc.), any colloid liner can be easily damaged by scratches. According to different conditions and conditions, choose different lining material, production process is the key to solve the above problems, composite ceramic lining technology with its impact resistance, cutting, stripping ability to become the first choice to improve the working life of the sensor program.

★ nuclear application technology
The use of nuclear detection technology to solve the problem of density measurement during the construction of dredgers has been widely used. Nuclear detection technology has the advantage of non-contact measurement, but due to the mystery of nuclear technology, professional, leading to the use of equipment in the following factors that affect the use of:
1, application personnel lack of knowledge about radiation, leading to blind panic or contempt, the safe place to work hard to get involved, there is a danger of radiation can not effectively identify the area.
2. There is not enough basic knowledge about the design of ray detection technology, the parameters to be calibrated during the process of equipment use are not well understood, and the relevant parameters can not be correctly and completely set, which affects the accurate working of the whole equipment.
3, the lack of technical standards for measurement, equipment performance no uniform evaluation system.
4, the concept of understanding there is bias, misled by some manufacturers, the life of the radioactive sources and their half-life confused.

★ production calculation and equipment composition program
Yield calculation involves soil parameters. Due to the frequent changes of soil quality during dredging construction, the accuracy of soil parameters can not be guaranteed, so the accuracy of real-time output calculation can not be guaranteed. Based on the construction data for a period of time, determining a set of comprehensive soil parameters will improve the calculation accuracy of the cumulative production. Different equipment composition scheme has a great impact on user's using effect, using cost and maintaining cost. For details, please refer to "Production Meter" section (or other relevant publicity material of the Company).