CN112557455A - Full-automatic conductivity calibration system for ocean detection sensor and application method thereof - Google Patents
Full-automatic conductivity calibration system for ocean detection sensor and application method thereof Download PDFInfo
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- CN112557455A CN112557455A CN202011532054.4A CN202011532054A CN112557455A CN 112557455 A CN112557455 A CN 112557455A CN 202011532054 A CN202011532054 A CN 202011532054A CN 112557455 A CN112557455 A CN 112557455A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
Abstract
The invention belongs to the technical field of conductivity sensor calibration equipment, and discloses a full-automatic conductivity calibration system of an ocean detection sensor, which comprises a measuring tank, wherein the measuring tank is communicated with a reservoir, a combined pump is arranged between the reservoir and the measuring tank, and two ends of the combined pump are respectively communicated with the measuring tank and the reservoir; a funnel is communicated above the measuring pool, a feeder is arranged between the funnel and the measuring pool, and two ends of the feeder are respectively communicated with the funnel and the measuring pool; an ultrasonic vibrator is arranged below the measuring pool and matched with the bottom surface of the measuring pool; a conductivity detector is arranged in the measuring tank, the conductivity detector is connected with an ARM controller, and the ARM controller is connected with a touch screen; the ARM controller is also connected with the combined pump, the feeder and the ultrasonic vibrator; the invention provides a full-automatic conductivity calibration system for a marine detection sensor, which can automatically prepare a required conductivity solution in the calibration process of the conductivity sensor, and a use method thereof.
Description
Technical Field
The invention belongs to the technical field of conductivity sensor calibration equipment, and particularly relates to a full-automatic conductivity calibration system of an ocean detection sensor and a use method thereof.
Background
Seawater salinity is a scale of salt content in seawater, is an important characteristic of seawater, and is a basic parameter for researching the physical process and the chemical process of seawater. The measurement of seawater salinity plays an important role in salt chemical engineering, marine climate monitoring, marine energy exploration and development and the like, and along with the development of marine industry, the development of conductivity-method salinity meters is rapid. The conductivity method is a method for indirectly measuring the salinity of seawater based on the physical characteristics of seawater conductivity. The method mainly measures the conductivity or conductivity ratio of the seawater through a certain circuit design.
When designing and manufacturing a conductivity sensor, a calibration process cannot be left, and the current situation is that an experimenter manually configures a solution with required conductivity according to a standard, measures the solution by using a standard instrument, compares the measured result with a self-made instrument, and then repeats an experiment by using conductivity solutions with different conductivity values, the whole process of preparing the solution is complicated, and the accuracy can be achieved only by high proficiency of an operator.
Disclosure of Invention
The invention aims to provide a full-automatic conductivity calibration system for a marine detection sensor, which can automatically prepare a solution with required conductivity in the calibration process of the conductivity sensor, and a use method thereof.
Based on the purpose, the invention adopts the following technical scheme:
a full-automatic conductivity calibration system for an ocean exploration sensor comprises a measuring pool, wherein the measuring pool is communicated with a water storage pool, a combined pump is arranged between the water storage pool and the measuring pool and comprises two peristaltic pumps, and two ends of each peristaltic pump are respectively connected with the water storage pool and the measuring pool; one peristaltic pump is 17 ml/min, the other peristaltic pump is 1 ml/min, the two peristaltic pumps are both connected with stepping motors, and the stepping motors connected with the peristaltic pumps are both connected with the ARM controller; a funnel is communicated above the measuring pool, a feeder is arranged between the funnel and the measuring pool, and two ends of the feeder are respectively communicated with the funnel and the measuring pool; an ultrasonic vibrator is arranged below the measuring pool and matched with the bottom surface of the measuring pool; a conductivity detector is arranged in the measuring tank, the conductivity detector is connected with an ARM controller, and the ARM controller is connected with a touch screen; the ARM controller is also connected with the combined pump, the feeder and the ultrasonic vibrator; a peristaltic pump of 17 ml/min was used in the large range (greater than 10 ml) and a peristaltic pump of 1 ml/min was used in the small range (less than 5 ml).
Furthermore, a liquid level meter is arranged in the reservoir, an electromagnetic valve is arranged at a water inlet of the reservoir, and the liquid level meter and the electromagnetic valve are both connected with the ARM controller.
Further, the feeder comprises a rotor arranged below the hopper, the rotor is connected with a stepping motor, a feeding groove matched with the bottom end of the hopper is formed in the rotor, a shell is arranged outside the rotor, a first shell hole corresponding to the feeding groove is formed in the top end of the shell, and a second shell hole symmetrical to the first shell hole is formed in the bottom end of the shell; the first shell hole and the second shell hole are through holes; the second shell hole is communicated with the measuring pool; the bottom end of the funnel is an upward concave cambered surface and is consistent with the outer wall of the rotor; the bottom end of the funnel penetrates through the first shell hole to be contacted with the feeding groove; the hole on the funnel is named as a feeding hole, the feeding hole arranged on the funnel is communicated with the feeding groove, and the projection of the feeding hole on the horizontal plane does not exceed the rotor; the shell is a hollow cylinder structure which is horizontally arranged; the rotor is a horizontally arranged cylindrical structure; the outer wall of the rotor is matched with the inner wall of the shell; the shell end face matched with the rotor is arranged in the shell; the end face of the shell end face close to the rotor is aligned with the end faces of the first shell hole and the second shell hole far away from the rotor, and one side of the feeding groove close to the shell end face is communicated with the outside; a hole site for mounting the stepping motor is arranged on the end surface of the shell; and a stepping motor of the feeder is connected with an ARM controller.
Further, the ARM controller is connected with the conductivity detector through a digital communication interface; the conductivity detector can directly output digital signals, and can realize conductivity real-time acquisition without signal processing, and data can be accurately uploaded in real time.
Furthermore, purified water in the measuring tank is extracted from the water storage tank by the combined pump, the sodium chloride particles can be added by rotating the stepping motor connected with the feeder, the ultrasonic vibrator is started to accelerate dissolution, and the solution to be measured with specific conductivity can be automatically configured as required.
The use method of the full-automatic conductivity calibration system of the ocean detection sensor comprises the following steps:
step 1, setting the water level of a reservoir, the primary water level of a measuring pool, a calibration range, the number of calibration points and a time interval by using a touch screen through an ARM controller;
step 2, the ARM controller converts touch information into a control signal, controls an electromagnetic valve and a combined pump, injects water into a reservoir and a measuring pool, controls a stepping motor of a feeder to add sodium chloride solid into the measuring pool, then the ARM controller starts a power supply of an ultrasonic vibrator, and the ultrasonic vibrator drives the measuring pool to vibrate to dissolve the sodium chloride solid;
and 3, controlling the conductivity value in the measuring pool to be larger than the maximum value of the calibration range by the ARM controller, and then starting calibration.
Further, the process of injecting water into the water storage tank and the measuring tank in the step 2 is as follows:
(1) the ARM controller starts the electromagnetic valve to inject water into the reservoir, and simultaneously starts the combined pump to pump water in the reservoir and inject water into the measuring tank;
(2) the ARM controller controls the starting time of the combined pump according to the set primary water level of the measuring tank, so that the water level in the measuring tank reaches the set primary water level of the measuring tank;
(3) the ARM controller monitors the liquid level in the reservoir in real time through a liquid level meter signal, and when the liquid level in the reservoir reaches the set reservoir water level, the ARM controller controls the electromagnetic valve to be closed, so that the set water level of the reservoir is maintained.
Further, the process of adding sodium chloride solid to the measuring cell in the step 2 is as follows:
(1) the ARM controller calculates the primary addition amount of the solid through an algorithm according to the set primary water level of the measuring pool and the maximum value of the calibration range;
(2) and the ARM controller controls the stepping motor of the feeder to rotate for a fixed number of times according to the calculated initial solid addition amount, and quantitative sodium chloride solids are added into the measuring cell.
Further, the process of controlling the conductivity value in the measuring cell by the ARM controller in step 3 is as follows: the ARM controller monitors the conductivity value in the measuring pool in real time through the conductivity detector, judges whether the maximum value of a set calibration range is smaller than the conductivity value in the current measuring pool, and if yes, the stepping motor of the feeder is closed, and calibration is started; if not, starting the stepping motor of the feeder to add the sodium chloride solid, and when the conductivity value added into the measuring pool is larger than or equal to the maximum value of the set calibration range, closing the stepping motor of the feeder to start calibration.
Further, the calibration process in step 3 is as follows:
(1) the ARM controller equally divides the set calibration range into a plurality of calibration points according to the number of the calibration points;
(2) the ARM controller starts the combined pump to add water into the measuring pool, reduces the conductivity value in the measuring pool, reduces the water yield of the combined pump when the conductivity value in the measuring pool is close to the maximum calibration point value, and closes the combined pump when the conductivity value in the measuring pool is equal to the maximum calibration point value;
(3) after the combination pump is closed, an operator measures and records the conductivity value in the measuring cell by using the self-made sensor;
(4) after the combination pump is closed and the set time interval countdown is finished, the ARM controller starts the combination pump to add water into the measuring pool, and the processes (2) and (3) are repeated, so that an operator measures and records a next calibration point value; and (3) continuously repeating the processes (2) and (3) until the conductivity values of all the calibration points are measured and recorded, and completing the calibration process.
The invention monitors the conductivity value of the conductivity solution by using an ARM controller and controls the amount of the solvent and the solute of the conductivity solution to prepare the conductivity solution with a specific conductivity value.
Compared with the prior art, the invention has the following beneficial effects:
the reservoir, the combined pump and the measuring tank are matched to add water into the measuring tank to provide a solvent required by preparing a conductivity solution; the funnel, the feeder and the measuring cell are matched, sodium chloride solid can be added into the measuring cell, and solute required by preparing the conductivity solution is provided; the ultrasonic vibrator is arranged below the measuring tank, and can quickly and effectively vibrate the whole measuring tank, so that the sodium chloride solid is quickly dissolved, and the conductivity solution is quickly prepared; the touch screen is connected with the ARM controller; the ARM controller is connected with the conductivity detector, the combined pump, the feeder and the ultrasonic vibrator, can monitor the conductivity value of the conductivity solution in the measuring tank in real time according to the conductivity detector, and controls the combined pump, the feeder and the ultrasonic vibrator in real time according to the monitored conductivity value to prepare the conductivity solution with a specific conductivity value; the touch screen provides a man-machine interface for the system, and a user can conveniently set the conductivity value of the solution to be calibrated and the mode configuration.
The combination pump is provided with two peristaltic pumps with different flow rates and is connected with the stepping motor, and the water yield can be accurately controlled by controlling the rotation number of the stepping motor of the peristaltic pump, so that the water amount flowing into the solution to be detected is controlled, and the preparation of the conductivity solution is more efficient; the level gauge and the solenoid valve cooperation in the cistern to connect ARM controller with level gauge and solenoid valve, make the switching automatic control water yield in the cistern of system's accessible control solenoid valve, with the water control in the cistern at specific height, make things convenient for the peristaltic pump ration to extract the pure water to measure in the pond.
The feeding hole is matched with the feeding groove, so that sodium chloride solids in the hopper can be fed into the feeding groove, and the rotor is matched with the shell, so that the sodium chloride solids in the feeding groove can be prevented from spilling out in the rotating process of the feeding rotor; the first shell hole is matched with the feeding hole, so that the sodium chloride solid in the hopper can be prevented from being influenced to be fed into the feeding groove; the second shell hole is communicated with the measuring pool, and sodium chloride solids in the feeding groove can be fed into the measuring pool when the feeding rotor rotates to the feeding groove to be matched with the second shell hole; the end face of the shell provides axial positioning for the installation of the rotor, so that the rotor is convenient to install; the stepping motor of the feeder is matched with the rotor and is connected with the ARM controller, so that the ARM controller can control the number of turns of the rotor to rotate, sodium chloride solid is quantitatively fed into the measuring pool by the feeder, and the efficiency of preparing the conductivity solution with a specific conductivity value is improved.
The ARM controller is connected with the conductivity detector through the digital communication interface, so that the conductivity detector can directly output digital signals, real-time conductivity acquisition can be realized without signal processing, data can be accurately uploaded in real time, the ARM controller can monitor conductivity values in the measuring cell in real time, and then a conductivity solution with a specific conductivity value can be prepared.
Drawings
FIG. 1 is a system framework schematic of example 1 of the present invention;
FIG. 2 is a schematic diagram showing the overall configuration of a system of example 1 of the present invention;
FIG. 3 is a schematic diagram showing the connection of a measuring cell and an ultrasonic vibrator according to example 1 of the present invention;
FIG. 4 is a schematic view of a charging device of example 1 of the present invention;
FIG. 5 is an exploded view of the charging device of example 1 of the present invention;
fig. 6 is an exploded view of the charging device of example 2 of the present invention.
In the figure, 1, a solenoid valve, 2, a liquid level meter, 3, a reservoir, 4, a pipeline, 5, a combination pump, 6, a funnel, 7, a feeder, 8, a conductivity detector, 9, a touch screen, 10, a control box, 11, an ARM controller, 12, an ultrasonic vibrator, 13, a measuring pool, 14, a shell, 15, a rotor, 16, a stepping motor, 17, a feeding groove, 18, a first shell hole, 19, a second shell hole, 20, a feeding hole, 21 and a shell end face.
Detailed Description
Example 1
A full-automatic conductivity calibration system for an ocean exploration sensor is shown in figures 1 and 2 and comprises a control box 10, wherein a measuring pool 13 is fixed in the control box 10, the measuring pool 13 is communicated with a water storage tank 3 through a pipeline 4, and a combined pump 5 is arranged in the pipeline 4; a feeder 7 is communicated above the measuring pool 13, a funnel 6 is communicated above the feeder 7, two ends of the feeder 7 are respectively communicated with the funnel 6 and the measuring pool 13, and the feeder 7 and the funnel 6 form a solid feeding device; as shown in fig. 3, an ultrasonic vibrator is arranged below the measuring cell 13, one end of the ultrasonic vibrator is fixed on the bottom surface of the measuring cell 13, and the other end of the ultrasonic vibrator is fixed on the bottom surface of the control box 10; a conductivity detector 8 is arranged in the measuring cell 13, and a conductivity sensor is fixed on a cover plate at the top end of the measuring cell 13; the conductivity detector 8 is connected with an ARM controller 11, and the ARM controller 11 is fixed on the bottom surface of the control box 10; the ARM controller 11 is connected with a touch screen 9, and the touch screen 9 is fixed on the front of the control box 10; the ARM controller 11 is also connected with the combined pump 5, the feeder 7 and the ultrasonic vibrator; the water storage tank 3 is filled with low-conductivity purified water, and the measuring tank 13 is used for containing the configured liquid to be measured; the touch screen 9 comprises a display and a touch panel, provides a man-machine interface for the system, and is convenient for a user to set the conductivity value and the mode configuration of the solution to be calibrated.
A liquid level meter 2 is arranged in the reservoir 3, the liquid level meter 2 is fixed on the top surface of the reservoir 3, an electromagnetic valve 1 is arranged at a water inlet outside the reservoir 3, and the liquid level meter 2 and the electromagnetic valve 1 are both connected with an ARM controller 11.
As shown in fig. 4 and 5, the feeding device comprises a feeder 7 and a hopper 6, the feeder 7 comprises a rotor 15 arranged below the hopper 6, the rotor 15 is connected with a stepping motor 16, a feeding groove 17 matched with the bottom end of the hopper 6 is arranged on the rotor 15, a shell 14 is arranged outside the rotor 15, a first shell hole 18 corresponding to the feeding groove 17 is formed in the top end of the shell 14, and a second shell hole 19 symmetrical to the first shell hole 18 is further formed in the bottom end of the shell 14; the first shell hole 18 and the second shell hole 19 are both through holes; the second shell hole 19 is communicated with the measuring cell 13; the bottom end of the funnel 6 is an upward concave cambered surface and is consistent with the outer wall of the rotor 15; the bottom end of the funnel 16 passes through the first shell hole 18 to be in contact with the feed chute 17; the hole on the funnel 6 is a feeding hole 20, the feeding hole 20 arranged on the funnel 6 is communicated with the feeding groove 17, and the projection of the feeding hole 20 on the horizontal plane does not exceed the rotor 15; the shell 14 is a horizontally arranged hollow cylinder structure; the rotor 15 is a horizontally arranged cylindrical structure; the outer wall of the rotor 15 is matched with the inner wall of the shell 14; a shell end face 21 matched with the rotor 15 is arranged in the shell 14; the end face of the shell end face close to the rotor 15 is aligned with the end faces of the first shell hole 18 and the second shell hole 19 far away from the rotor 15, and one side of the feed chute 17 close to the shell end face 21 is communicated with the outside; a hole site for installing the stepping motor 16 is arranged on the shell end surface 21; the stepping motor 16 of the feeder 7 is connected with the ARM controller 11.
The ARM controller 11 is connected with the conductivity detector 8 through a digital communication interface; the conductivity detector 8 can directly output digital signals, and can realize conductivity real-time acquisition without signal processing, and data can be accurately uploaded in real time.
The combined pump 5 consists of two peristaltic pumps, one is a peristaltic pump of 17 ml/min, the other is a peristaltic pump of 1 ml/min, and both the peristaltic pumps are driven by stepping motors; the stepping motors of the two peristaltic pumps are connected with the ARM controller 11, and the water yield can be accurately controlled by controlling the rotation number of the stepping motors of the peristaltic pumps, so that the water amount flowing into the solution to be detected is controlled.
Purified water in the measuring tank 13 is extracted from the water reservoir 3 by the combined pump 5, sodium chloride particles can be added after the stepping motor 16 connected with the feeder 7 rotates, the ultrasonic vibrator 12 is started to accelerate dissolution, and the solution to be measured with specific conductivity can be automatically prepared as required.
The use method of the full-automatic conductivity calibration system of the ocean detection sensor comprises the following steps:
step one, when the water storage tank is used for the first time, the liquid level of the water storage tank 3 is set to be a fixed value, and the subsequent setting is not needed; an operator uses the touch screen 9 to set the primary water level of the measuring tank, the calibration range (minimum value-maximum value), the number of calibration points and the time interval through the ARM controller 11; the number of calibration points can be set within the maximum and minimum range by a user, an operator can set the calibration time interval of each point according to actual requirements (the minimum value is 1min, the solid is ensured to be fully dissolved, and the solid and the liquid are uniformly mixed), and an 'opening' button in the touch screen 9 is clicked to open an automatic calibration process.
Step 2, an ARM controller 11 in the control box 10 converts the touch information into a control signal and starts a control process; after receiving an opening command, the ARM controller 11 firstly controls the electromagnetic valve 1 to be opened, water is filled into the reservoir 3, the liquid level in the reservoir 3 is monitored in real time through signals of the liquid level meter 2, when the liquid level of the reservoir 3 reaches a preset liquid level value, the electromagnetic valve 1 is closed, and water inflow is stopped;
when water is stored, the ARM controller 11 controls the combined pump 5 to start working, the ARM controller 11 calculates the number of turns of the combined pump 5 according to the set primary water level of the measuring tank and controls the combined pump 5 to rotate according to the calculated number of turns, and quantitative water is pumped into the measuring tank 13; when water is added into the measuring tank 13, different peristaltic pumps are started to add water according to the set value of the initial water level of the measuring tank, a peristaltic pump of 17 ml/min is started in a large range, and a peristaltic pump of 1 ml/min is started in a small range;
the feeding hopper 6 above the measuring pool 13 is pre-filled with sodium chloride solid particles, the sodium chloride solid particles enter the feeding groove 17 through the feeding hole 20, when the combined pump 5 stops working, the stepping motor 16 of the feeder 7 is started, the feeder 7 drives the feeding groove 17 to rotate, and when the feeding groove 17 is communicated with the second shell hole 19, the sodium chloride solid particles in the feeding groove 17 enter the measuring pool 13 through the second shell hole 19; when the feeding groove 17 rotates to the position below the feeding hole 20 every time, the feeding hole 20 is communicated with the feeding groove 17 for enough time to fill the feeding groove 17, so that the adding amount is a fixed value every time, the adding frequency is determined by a control algorithm, the algorithm is an algorithm for controlling the conductivity, the value of the conductivity in the measuring pool 13 is changed by controlling the proportion of solid and liquid, the feeding device is automatically reset after timing is finished, namely the feeding groove 17 is rotated to be aligned with the feeding hole 20, and the solid particle adding is finished;
when the feeding device is reset, starting a stirring process, starting a power supply of an ultrasonic vibrator 12 by an ARM controller 11, driving the wall of a measuring tank 13 to vibrate by the ultrasonic vibrator 12, so that liquid in the measuring tank 13 vibrates, solid particles and liquid dissolution are accelerated, the dissolution time can be freely set by a user, and when the dissolution set time is over, ending the dissolution process, and closing the power supply of the ultrasonic vibrator 12; the above is the ready work of the calibration process, and the whole process lasts for more than 1-2 minutes.
Step 3, the ARM controller 11 judges whether the maximum value of the calibration range set by the user is smaller than the conductivity value in the current measuring pool 13, if not, the solid adding process is repeated until the conductivity in the current measuring pool 13 is larger than or equal to the maximum value of the set value; starting the ultrasonic vibrator 12 after adding the solid, wherein the working time of the ultrasonic vibrator 12 after adding the solid is longer, generally 2min, stopping when no solid is added after the time is up, and resetting for 2min for timing when the solid is added; if the maximum value of the calibration range is smaller than the conductivity value in the measuring cell 13, the calibration is started;
according to the calibration point number, the calibration range and the time interval set by a user, the ARM controller 11 equally divides the calibration range into a plurality of calibration points according to the calibration point number, defaults to take a maximum value, and the maximum value is from big to small, the upper limit is included, and the lower limit is not included; if the maximum value of the set calibration range is 20ms/cm, the minimum value is 10ms/cm and the number of calibration points is 10, the calibration points are 20ms/cm, 19 ms/cm, 18 ms/cm, 17 ms/cm, 16 ms/cm, 15 ms/cm, 14 ms/cm, 13 ms/cm, 12 ms/cm and 11 ms/cm in sequence from 20ms/cm, and the measurement time interval between every two adjacent calibration points is the time interval set by a user;
therefore, the remaining process is as follows: the ARM controller 11 collects the conductivity value in the measuring tank 13 through the conductivity sensor, compares the conductivity value with the maximum calibration point value, if the conductivity value in the measuring tank 13 is larger than the maximum calibration point value, the combined pump 5 is started, water in the reservoir 3 is extracted, water is added into the measuring tank 13, the conductivity value in the measuring tank 13 is monitored in real time, the conductivity value in the tank 13 to be measured is close to the maximum calibration point value, namely, the water yield of the combined pump 5 is reduced by reducing the rotating speed of a stepping motor of the combined pump 5 until the maximum calibration point conductivity value is reached, and the combined pump 5 stops working; after water is added into the measuring pool 13, the ultrasonic vibrator 12 is also started, the working time is 30s, after the time is up, the ultrasonic vibrator stops when no liquid is added, and the ultrasonic vibrator resets for 30s for timing when the liquid is added; when water is added into the measuring tank 13 to dilute the solution, the conductivity value of the solution is monitored constantly, a 17 ml/min peristaltic pump is adopted when the difference value between the current conductivity value and the set conductivity value is greater than 1ms/cm, a 1 ml/min peristaltic pump is adopted when the difference value is less than or equal to 1ms/cm, a large-flow peristaltic pump is adopted in a large atmosphere, so that water inlet is more timely, the overall time is shortened, a small-flow peristaltic pump is adopted in a small range to more accurately control the conductivity of the solution in the measuring tank 13, and the excessive water added into the measuring tank 13 is prevented;
and then the operator finishes measuring and recording the measured value at the point, the countdown of the time interval set by the user is finished, the solution preparation of the next calibration point is automatically started, the ARM controller 11 starts the combination pump 5, adds water into the measurement pool 13, dilutes the solution in the measurement pool 13, reduces the conductivity value of the solution in the measurement pool 13, repeats the processes until the conductivity value in the measurement pool 13 is equal to the value of the point to be calibrated, stops the work of the combination pump 5, repeats the measurement work of each calibration point in this way, and stops the calibration of the group until the data of all the calibration points are measured.
Example 2
This embodiment is different from embodiment 1 in that: the rotor 15 is different in structure.
As shown in fig. 6, the feed chute 17 of the rotor 15 on the side close to the end face 21 of the casing is not in communication with the outside.
Claims (9)
1. The utility model provides a full-automatic calibration system of ocean detection sensor conductivity which characterized in that: the device comprises a measuring tank, wherein the measuring tank is communicated with a water storage tank, a combined pump is arranged between the water storage tank and the measuring tank, the combined pump comprises two peristaltic pumps, and two ends of the two peristaltic pumps are respectively connected with the water storage tank and the measuring tank; one peristaltic pump is 17 ml/min, the other peristaltic pump is 1 ml/min, the two peristaltic pumps are connected with stepping motors, and the stepping motors connected with the peristaltic pumps are connected with the ARM controller; a funnel is communicated above the measuring pool, a feeder is arranged between the funnel and the measuring pool, and the upper end and the lower end of the feeder are respectively communicated with the funnel and the measuring pool; an ultrasonic vibrator is arranged below the measuring pool and matched with the bottom surface of the measuring pool; a conductivity detector is arranged in the measuring tank, the conductivity detector is connected with an ARM controller, and the ARM controller is connected with a touch screen; the ARM controller is also connected with the combination pump, the feeder and the ultrasonic vibrator.
2. The full-automatic conductivity calibration system for the ocean detection sensor according to claim 1, wherein: the feeder comprises a rotor arranged below the hopper, the rotor is connected with a stepping motor, a feeding groove matched with the bottom end of the hopper is formed in the rotor, a shell is arranged outside the rotor, a first shell hole corresponding to the feeding groove is formed in the top end of the shell, and a second shell hole symmetrical to the first shell hole is further formed in the bottom end of the shell; the first shell hole and the second shell hole are through holes; the second shell hole is communicated with the measuring cell; the bottom end of the funnel is an upward concave cambered surface and is consistent with the outer wall of the rotor; the bottom end of the funnel penetrates through the first shell hole to be contacted with the feeding groove; the feeding hole arranged on the hopper is communicated with the feeding groove, and the projection of the feeding hole on the horizontal plane does not exceed the rotor; the shell is of a hollow cylinder structure which is horizontally arranged; the rotor is a horizontally arranged cylindrical structure; the outer wall of the rotor is matched with the inner wall of the shell; the shell end face matched with the rotor is arranged in the shell; the end face of the shell end face close to the rotor is aligned with the end faces of the first shell hole and the second shell hole far away from the rotor, and one side of the feeding groove close to the shell end face is communicated with the outside; a hole site for mounting the stepping motor is arranged on the end surface of the shell; and a stepping motor of the feeder is connected with an ARM controller.
3. The full-automatic conductivity calibration system for the ocean exploration sensor according to claim 2, wherein: be provided with the level gauge in the cistern, the water inlet department of cistern is provided with the solenoid valve, level gauge and solenoid valve all are connected with the ARM controller.
4. The full-automatic conductivity calibration system for the ocean exploration sensor according to claim 3, wherein: and the ARM controller is connected with the conductivity detector through a digital communication interface.
5. The use method of the full-automatic calibration system for the conductivity of the ocean detection sensor according to the claims 1-4 is characterized by comprising the following steps:
step 1, setting the water level of a reservoir, the primary water level of a measuring pool, a calibration range, the number of calibration points and a time interval by using a touch screen through an ARM controller;
step 2, the ARM controller converts touch information into a control signal, controls an electromagnetic valve and a combined pump to inject water into a reservoir and a measuring pool, controls a stepping motor of a feeder to add sodium chloride solid into the measuring pool, then the ARM controller starts a power supply of an ultrasonic vibrator, and the ultrasonic vibrator drives the measuring pool to vibrate to dissolve the sodium chloride solid;
and 3, controlling the conductivity value in the measuring pool to be larger than the maximum value of the calibration range by the ARM controller, and then starting calibration.
6. The method for using the system for calibrating the conductivity of the ocean exploration sensor according to claim 5, wherein the step 2 of filling water into the water reservoir and the measuring tank comprises the following steps:
(1) the ARM controller starts the electromagnetic valve to inject water into the reservoir, and simultaneously starts the combined pump to pump water in the reservoir and inject water into the measuring tank;
(2) the ARM controller controls the starting time of the combined pump according to the set primary water level of the measuring tank, so that the water level in the measuring tank reaches the set primary water level of the measuring tank;
the ARM controller monitors the liquid level in the reservoir in real time through a liquid level meter signal, and when the liquid level in the reservoir reaches the set reservoir water level, the ARM controller controls the electromagnetic valve to be closed, so that the set water level of the reservoir is maintained.
7. The use method of the full-automatic calibration system for the conductivity of the ocean detection sensor according to claim 5 or 6, wherein the process of adding the sodium chloride solid into the measuring cell in the step 2 is as follows:
(1) the ARM controller calculates the primary addition amount of the solid through an algorithm according to the set primary water level of the measuring pool and the maximum value of the calibration range;
(2) and the ARM controller controls the stepping motor of the feeder to rotate for a fixed number of times according to the calculated initial solid addition amount, and quantitative sodium chloride solids are added into the measuring cell.
8. The method for using the system for automatically calibrating the conductivity of the ocean exploration sensor according to claim 5, wherein in the step 3, the ARM controller controls the conductivity value in the measuring cell to be as follows: the ARM controller monitors the conductivity value in the measuring pool in real time through the conductivity detector, judges whether the maximum value of a set calibration range is smaller than the conductivity value in the current measuring pool, and if yes, the stepping motor of the feeder is closed, and calibration is started; if not, starting the stepping motor of the feeder to add the sodium chloride solid, and when the conductivity value added into the measuring pool is larger than or equal to the maximum value of the set calibration range, closing the stepping motor of the feeder to start calibration.
9. The use method of the full-automatic conductivity calibration system for the ocean detection sensor according to claim 5 or 8, wherein in the step 3, the calibration process comprises the following steps:
(1) the ARM controller equally divides the set calibration range into a plurality of calibration points according to the number of the calibration points;
(2) the ARM controller starts the combined pump to add water into the measuring pool, reduces the conductivity value in the measuring pool, reduces the water yield of the combined pump when the conductivity value in the measuring pool is close to the maximum calibration point value, and closes the combined pump when the conductivity value in the measuring pool is equal to the maximum calibration point value;
(3) after the combination pump is closed, an operator measures and records the conductivity value in the measuring cell by using the self-made sensor;
(4) after the combination pump is closed and the set time interval countdown is finished, the ARM controller starts the combination pump to add water into the measuring pool, and the processes (2) and (3) are repeated, so that an operator measures and records a next calibration point value; and (3) continuously repeating the processes (2) and (3) until the conductivity values of all the calibration points are measured and recorded, and completing the calibration process.
Priority Applications (1)
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