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 salinity measurement method. The salinity measurement method specifically comprises the following steps: 1, solving the conductivity of a salt solution by calculation formulas of salinity temperature and conductivity when the salinity and the temperature are known; 2, substituting the solved conductivity into a calculation formula of a plane circular electrode model and establishing a relation between a sensor resistance and the salinity and temperature; 3, substituting an output voltage value of a sensor into a charging / discharging formula of a sensor resistance-capacitance network, and solving a resistance value of the other group of sensor; and 4, carrying out curve fitting to establish two groups of formulas of resistance values, which are obtained by calculation, and determining relative parameters, so as to establish a function relation of salinity, temperature and voltage. With the adoption of the salinity measurement method, the acquisition amount of calibrated data is extremely reduced through the plane circular electrode model which is established by salinity measurement, so that the calibration efficiency is improved, the calculation speed is accelerated and the influences of temperature effect are reduced, and furthermore, the salinity measurement accuracy is remarkably improved.

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 relates to a salinity meter with a suction pump protecting device, which comprises a salinity meter main body with a suction pump and a sump and is characterized by also comprising the suction pump protecting device, wherein the upper end of the suction pump protecting device is connected with the inlet end of the suction pump, while the lower end is inserted into the sump; a tubular body in the suction pump protecting device is divided into three cavities by a valve seat and a director from the top to bottom, namely the cavity wall side above the valve seat is provided with a safety valve communicated with the external atmosphere by means of an air inlet; the cavity wall side between the valve seat and the director is provided with an air inlet hole; and a floater is arranged in the cavity under the director, a valve rod passing through the director is fixed in the axial direction of the floater, and the top of the valve rod is provided with a valve head. The valve headprevents waste liquor from entering the suction pump along with the rise of the liquor level. The salinity meter has simple process, eliminates corrosion even burning of the suction pump caused by ambient environment and improper human operation, ensures the continuity and stability of field salinity measurement, prolongs the service life and reduces the maintenance charge.

The object of the present invention relates to a system for measuring the salinity of hydrocarbons at the bottom of an oil well, using the technique of time domain reflectometry (TDR). The system comprises an electromagnetic pulse generator, an oscilloscope for displaying and measuring the frequency, amplitude and wavelength of the signal, a signal amplifier, a computer for processing and storing the information, and a metal wire that functions as a waveguide To transmit the signal from the signal generator to the hydrocarbon to which its salinity is to be determined at the bottom of the well. The signal returns from the bottom of the well to the oscilloscope where the difference between the sent signal and the return signal is measured. This difference allows us to infer the salinity of the hydrocarbon. The guide wire is attached to the production line by means of a strap or other fastening device from the surface to the bottom of the well, where the tip of the cable is inserted into the pipe to contact the hydrocarbon and in this way detect its salinity. It is possible to use the same pipe as a waveguide to transmit the test signal to the bottom of the well. In addition, the salinity of the hydrocarbon can be determined at different points along the well.

The invention discloses an optical fiber detector for measuring the salinity and a measurement device using the optical fiber detector. The optical fiber detector is characterized by comprising an optical fiber probe, wherein the optical fiber probe is composed of a first optical fiber, a long-period optical fiber grating, a second optical fiber, fiber bragg gratings and a third optical fiber; one end of the first optical fiber is plated with a metal reflection membrane; the other end of the first optical fiber, an optical fiber carried with the long-period optical fiber grating, the second optical fiber, the optical fiber carried with the fiber bragg grating and the third optical fiber are connected with one another in sequence. The optical fiber detector for measuring the salinity has the advantages that the optical fiber detector is simple in whole structure and convenient to manufacture; the price of each part of the optical fiber is low and the ranges of the applicable environment temperature and environment depth are wide; the optical fiber detector is suitable for large-scale production; the measuring device using the optical fiber detector is convenient to assemble and is easy to operate by users; the measurement device can be used for accurately obtaining the salinity, the temperature and the depth of a water body in a large range in real time.

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.

The invention relates to an underwater section detection buoyage. The buoyage comprises a cable puller hinging ring, a temperature, salinity and pressure measuring sensor, a sensor protection cover, a buoyancy cabin, an underwater control unit, an inner oil bag, a direct current motor, an electric rotating valve, a check valve, a hydraulic motor, a rear end cover, an outer oil bag, an oil bag protection cover and a buoy watertight connector. The underwater section detection buoyage can be used for buoyancy conversion and lift control for performing temperature measurement, salinity measurement and depth measurement on sea water. The underwater section detection buoyage is connected with an ice-based buoyage by a high strength pulling cable device with seawater corrosion-resistant vulcanized joints for forming a shallow water type pull-type temperature, salinity and depth monitoring system in the Arctic Ocean. The underwater section detection buoyage is used for performing underwater temperature, salinity and depth section measurement with the measuring depth being 0-120m under the ice layer, so that the blank of being short of an observation method for 120m or shallower water in high seas internationally is filled, and the hydrological and meteorological simultaneous observation in the same region is realized; a lithium battery with ultra-large capacity is adopted for supplying power, so that the service life of the system is prolonged, and the underwater section detection buoyage can be applied to the field related to research in polar regions internationally.