40 results about "Salinity measurement" patented technology

An electronic salt meter including a sensor rod, salt meter body and receiving components to measure a temperature and salinity. The electronic salt meter includes a first and sensor electrode and a temperature sensor to detect a temperature of the measurement object. A measurement monitoring unit detects whether the first and second sensor electrodes are electrically connected to each other. A salinity measurement unit applies an AC power to the first and second sensor electrodes to measure salinity of the measurement object. A temperature measurement unit applies a power to the temperature sensor to measure the temperature of the measurement object. A thermal equilibrium detection unit stores the temperature value previously measured, and when the temperature variation is less than a predetermined threshold, it is determined as a thermal equilibrium state. A room-temperature salinity conversion unit converts the salinity value into a salinity value at room temperature.

The invention discloses a continuous observation system for dissolving of methane in a surface water body, relating to greenhouse gas monitoring equipment. The continuous observation system is provided with a surface water pump, filtering equipment, temperature and salinity measurement equipment, a flow controller, a water-vapor balance device, a temperature probe, a gas pump, a cold trap, a waterproof electrode, a filtering device, an off-axis integral cavity output spectrum detector, a valve and a standard gas cylinder; a water inlet of the surface water pump is arranged underwater, a water outlet of the surface water pump is connected with an inlet of the filtering equipment, an outlet of the filtering equipment is connected with the temperature and salinity measurement equipment, an outlet of the temperature and salinity measurement equipment is connected with an inlet of the flow controller, an outlet of the flow controller is connected with the balance device which is communicated with the atmosphere, an air outlet formed in the upper part of the balance device is connected with a gas inlet of the gas pump, the temperature probe is arranged in the balance device, a gas outlet of the gas pump is connected with an inlet of the cold trap, an outlet of the cold trap is connected with the waterproof electrode, an outlet of the waterproof electrode is connected with an inlet of the filtering device, an outlet of the filtering device is connected with an inlet of the detector, and an outlet of the standard gas cylinder is connected with the balance device and the detector through the valve respectively.

The invention discloses a system and method for measuring seawater salinity based on orthogonal phase-locked amplification technology. The system includes a constant temperature water tank, in which a conductivity cell, a spiral coil, an agitator and a constant temperature device are arranged, the conductivity cell, the agitator and the constant temperature device are connected with the detection control device, the detection control device is also connected with a multi-way valve, a peristaltic pump and a computer terminal. Tanks and standard seawater storage tanks, the outlet is connected to the inlet of the conductivity cell through a peristaltic pump and a spiral coil; two current electrodes and two voltage electrodes are set in the conductivity cell, and the current electrode is a composite oxide electrode loaded with nano-scale platinum; the voltage electrode It is a silver / silver chloride reference electrode; the detection control device adopts digital orthogonal lock-in amplification technology, and the lock-in module is realized by FPGA through digital programming. The method disclosed by the invention is convenient and quick to operate, has high testing efficiency and has relatively high performance index.

The invention relates to the technical field of dynamic testing of oil wells in the petroleum industry, in particular to a multi-sensor fusion measurement system for measuring water content and / or salinity. The output of the programmable oscillator (X1) is connected to the multiplexer (X2), the multiplexer (X2) is connected to the coupler (X5) for communication, and the coupler (X5) is connected to the digital phase shifter (X6) for communication. The phase shifter (X6) communicates with the phase difference detector (X7); the output of the programmable oscillator (X1) is connected to the multi-channel signal distributor (X2) to generate multiple high-frequency signals of the same frequency, amplitude and phase; first take one of the channels After the high-frequency signal enters the coupler (X5), two signals are output, which is the water content measurement part; secondly, two high-frequency signals are taken, which is the salinity measurement part.

The invention discloses a tidal mangrove seedling raising irrigation system, which comprises a seedling bed, a water inlet pump, a timing switch, a water inlet pipe, a timing valve, a drainage pipe, aliquid level sensor, a circulating pool and a salinity measuring device; the seedling bed has an accommodating space with an upward opening; the water inlet pipe is connected with a water inlet of the water inlet pump, and a water outlet of the water inlet pump is connected with the seedling bed; the seedling bed is connected with the water inlet of the timing valve, and the water outlet of the timing valve is connected with the drainage pipe; the water inlet pump is electrically connected with the timing switch and the liquid level sensor, the timing valve is electrically connected with theliquid level sensor. The tidal irrigation system starts flooding irrigation automatically at regular intervals and drains automatically after carrying out flooding irrigation for a fixed time. A salinity probe of a salinity sensor can be maintained continuously in the middle of the circulating pool so that the salinity of the water can be measured stably. The irrigation system is used for seedling raising irrigation of mangrove plants.