Ocean multi-parameter profile measuring instrument

Abstract

The invention discloses an ocean multi-parameter profile measuring instrument, and relates to the technical field of ocean measurement. The modular design is adopted, each sensor probe can be independently calibrated and tested, replacement is convenient, plug and play is achieved, the maintenance period is greatly shortened, and the maintenance cost is greatly reduced. A GNSS positioning module is additionally arranged, time, a pressure zero point and current station longitude and latitude are automatically searched and recorded when equipment is started, a Bluetooth wireless transmission module is additionally arranged, data can be automatically transmitted and state information such as electric quantity can be monitored in real time when the instrument is exposed out of the water surface, and intelligentization of data acquisition, recording and observation is achieved. The state information and measurement data of the measuring instrument can be obtained without recovering the instrument, the data of each observation station can be rapidly and timely obtained, and the observation efficiency is improved. The power-on can be realized by rotating the tail end cover for 90 degrees, the operation is simple and convenient, the user-friendly LED indicating lamp is arranged, the power-on state and the states of the GNSS, the battery and the Bluetooth can be clearly displayed, the interference of environmental noise is avoided, and the user operation experience is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean measurement, and particularly to a novel ocean multi-parameter profiling instrument. Background Art

[0002] The ocean multi-parameter profiling instrument integrates temperature, conductivity, pressure, and pH sensors, and is used for observing the environmental parameters of the ocean profile, providing data support for ocean scientific research and the observation and monitoring of the ocean ecosystem.

[0003] During the actual use process, the multi-parameter sensor probe needs to be calibrated and maintained regularly. In the traditional ocean multi-parameter profiling instrument, the sensor probe is fixedly installed, which makes the calibration and maintenance of the sensor probe each time require the overall repair and maintenance of the measuring instrument, with a long cycle and high cost, and is not conducive to large-scale popularization and application. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel ocean multi-parameter profiling instrument, which adopts a modular design, and each sensor probe can be individually calibrated and tested, is convenient to replace, plug-and-play, and can greatly reduce the maintenance cycle and cost, so as to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides an ocean multi-parameter profiling instrument, including a sealed cabin body, a temperature sensor, a conductivity sensor, a pressure sensor, a pH sensor, a GNSS positioning module, a battery compartment, a switch assembly, and an acquisition control circuit board. The acquisition control circuit board is arranged in the sealed cabin body. The temperature sensor, the conductivity sensor, the pressure sensor, and the pH sensor are respectively installed in a pluggable manner with the sealed cabin body through a watertight connector. Moreover, the temperature sensor, the conductivity sensor, the pressure sensor, and the pH sensor are all built-in with a standardized description file and an independent power supply and signal conditioning circuit. The main controller of the acquisition control circuit board can send a broadcast instruction through a communication bus to automatically detect and drive the newly connected sensor. The GNSS positioning module is arranged in the sealed cabin body and is communicatively connected with the acquisition control circuit board. The GNSS positioning module has a GNSS positioning function and a pressure zero marking function. The battery compartment is arranged in the sealed cabin body and is communicatively connected with the acquisition control circuit board. The acquisition control circuit board adopts an adaptive power management mechanism to monitor and manage the power of the battery compartment. The switch assembly is used to turn on and off the measuring instrument and can display the use state of the measuring instrument through an indicator light.

[0006] Preferably, the sealed cabin body includes a sealed cylinder, a head end cover and a tail end cover, and the head end cover and the tail end cover are respectively and sealingly installed at two axial ends of the sealed cylinder; a circuit board bracket is arranged in the sealed cylinder, and the acquisition control circuit board is installed on the circuit board bracket; four cabin watertight connectors are fixed on the head end cover, and the temperature sensor, the conductivity sensor, the pressure sensor and the pH sensor are respectively and pluggably installed with the corresponding cabin watertight connectors through watertight connectors.

[0007] Preferably, the pressure sensor is a silicon piezoresistive pressure sensor, a pressure watertight connector is arranged at the rear end of the silicon piezoresistive pressure sensor, and the silicon piezoresistive pressure sensor is pluggably installed with the corresponding cabin watertight connector through the pressure watertight connector; the conductivity sensor is a seven-electrode conductivity sensor, a conductivity watertight connector is arranged at the rear end of the seven-electrode conductivity sensor, and the seven-electrode conductivity sensor is pluggably installed with the corresponding cabin watertight connector through the conductivity watertight connector; the temperature sensor is a thermistor sensor, a temperature watertight connector is arranged at the rear end of the thermistor sensor, and the thermistor sensor is pluggably installed with the corresponding cabin watertight connector through the temperature watertight connector; the pH sensor is a pH composite electrode sensor, a pH watertight connector is arranged at the rear end of the pH composite electrode sensor, and the pH composite electrode sensor is pluggably installed with the corresponding cabin watertight connector through the pH watertight connector.

[0008] Preferably, the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all locked and fixed with the head end cover through watertight connector latches.

[0009] Preferably, the four cabin watertight connectors are evenly embedded in the head end cover; the watertight connector latch is cylindrical, the rear ends of the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all sleeved with the watertight connector latch, the rear end of the watertight connector latch is threadedly connected with the installation hole of the head end cover in which the cabin watertight connector is embedded, a snap ring is arranged at the front end port of the watertight connector latch, and a raised step adapted to the snap ring is arranged on each of the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector.

[0010] Preferably, the marine multi-parameter profiling measuring instrument further includes a Bluetooth wireless transmission module, and the Bluetooth wireless transmission module is arranged in the sealed cabin body and is communicatively connected with the acquisition control circuit board.

[0011] Preferably, the battery compartment can supply power to the GNSS positioning module, the Bluetooth wireless transmission module, the temperature sensor, the conductivity sensor, the pressure sensor, the pH sensor, and the acquisition control circuit board.

[0012] Preferably, the marine multi-parameter profiler further includes an external watertight connector, which is threadedly connected to the tail end cover and is communicatively connected to both the acquisition control circuit board and the battery compartment; the external watertight connector can be externally connected to a matching cable to charge the battery compartment or perform wired data transmission.

[0013] Preferably, the switch assembly includes a switch and an LED circuit board, a cabin gland, and a rotary switch. Four Hall switches and four LED indicators are evenly distributed along the circumference on the switch and the LED circuit board, and the LED indicators and the Hall switches are arranged alternately at intervals. The four LED indicators are respectively a GNSS signal lamp, a Bluetooth signal lamp, a power lamp, and a power-on status lamp; the switch and the LED circuit board are fixed to the inner end face of the tail end cover, and a sapphire window is embedded and installed on the outer end face of the tail end cover to display the status of the LED indicators; the cabin gland is fixed to the outer end face of the tail end cover to axially limit the sapphire window; the rotary switch is sleeved outside the cabin gland and is rotationally matched with the cabin gland. Four blind holes and four through holes are evenly distributed along the circumference on the rotary switch, and the blind holes and the through holes are arranged alternately at intervals. Magnets are embedded in the four blind holes. By rotating the rotary switch, the magnets can be brought closer to or farther away from the Hall switches to turn on or off the profiler. The four through holes correspond to the four LED indicators one by one.

[0014] Preferably, the marine multi-parameter profiler further includes a host computer used in conjunction with the marine multi-parameter profiler. An evaluation software is configured on the host computer. The evaluation software can intelligently evaluate the performance status of the temperature sensor, the conductivity sensor, and the pressure sensor respectively according to the on-site measurement data and calibration period of the temperature sensor, the conductivity sensor, and the pressure sensor; the evaluation software can intelligently evaluate the performance status of the pH sensor according to the measurement and calibration data of the pH sensor.

[0015] The present invention has achieved the following technical effects compared with the prior art: The marine multi-parameter profiler proposed by the present invention integrates the measurement functions of four parameters, namely conductivity, pressure, temperature, and pH. Each sensor adopts a modular design, and each sensor probe can be individually calibrated and tested, with convenient replacement and plug-and-play, greatly reducing the maintenance period and cost, and solving the problems of long maintenance period and high cost of the whole profiler, which is not conducive to large-area popularization and application.

[0016] In some of the technical solutions disclosed in the present invention, a new GNSS positioning module is added. When the device is turned on, it automatically searches for and records the time, pressure zero point, and the longitude and latitude of the current position. It has a fast response and high accuracy, realizing the intelligence of data acquisition, recording, and observation, improving the accuracy of pressure profile measurement, and solving the problem that in the use of traditional measuring instruments, the longitude and latitude information and observation time of each position need to be manually recorded, and the subsequent data sorting process is cumbersome, which is not conducive to the efficient analysis and collaborative processing of data.

[0017] In some of the technical solutions disclosed in the present invention, a Bluetooth wireless transmission module is added. When the instrument emerges from the water surface, it can automatically transmit data and monitor status information such as battery power in real time, realizing the intelligence of data acquisition, recording, and observation. Without retrieving the instrument, the status information and measurement data of the measuring instrument can be obtained, which is conducive to quickly and timely obtaining the data of each observation position and improving the observation efficiency.

[0018] In some of the technical solutions disclosed in the present invention, through a clever structural design, the tail end cover can be rotated 90 degrees to turn on the machine. The operation is simple, and it is equipped with user-friendly LED indicators that can clearly display the power-on status, GNSS, battery, and Bluetooth status, without being interfered by environmental noise, greatly improving the user operation experience.

[0019] In some of the technical solutions disclosed in the present invention, the measuring instrument has an intelligent evaluation function. According to the evaluation status of the instrument (green, yellow, red), the system can automatically prompt whether calibration or return to the factory for repair is required, ensuring that each sensor is always in the best working state, thereby guaranteeing the accuracy of measurement data and the reliability of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the marine multi-parameter profile measuring instrument disclosed in the embodiments of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall section of the marine multi-parameter profile measuring instrument disclosed in the embodiments of the present invention.

[0023] Figure 3 It is a schematic diagram of the installation of each sensor module disclosed in the embodiments of the present invention.

[0024] Figure 4Schematic diagram of the structure of the switch and the LED circuit board disclosed in the embodiments of the present invention.

[0025] Figure 5 Schematic diagram of the structure and installation of the rotary switch disclosed in the embodiments of the present invention.

[0026] Figure 6 Schematic diagram of the structure and installation of the sapphire window and the gland disclosed in the embodiments of the present invention.

[0027] In the figure, the reference numerals are: 100 - Marine multi-parameter profiler, 101 - Sealed cabin, 102 - Temperature sensor, 103 - Conductivity sensor, 104 - Pressure sensor, 105 - pH sensor, 1 - Pressure buffer plug, 2 - Pressure sealing cylinder, 3 - Pressure probe, 4 - Pressure measurement circuit board, 5 - Pressure end cap, 6 - Watertight connector lock, 7 - Cabin watertight connector, 8 - Head end cap, 9 - Circuit board bracket, 10 - Sealing cylinder, 11 - Acquisition and control circuit board, 12 - Battery compartment, 13 - Tail end cap, 14 - Switch and LED circuit board, 141 - Hall switch, 142 - LED indicator, 15 - Sapphire window, 16 - Rotary switch, 161 - Through hole, 17 - Cabin gland, 18 - External watertight connector, 19 - Temperature protection cover, 20 - Temperature probe, 21 - Conductivity probe, 22 - pH protection plate, 23 - Glass electrode, 24 - Support column, 25 - Reference electrode, 26 - Pressure watertight connector. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a new type of marine multi-parameter profiler, which adopts a modular design. Each sensor probe can be calibrated and tested separately, is convenient to replace, plug-and-play, and can greatly reduce the maintenance cycle and cost to solve the problems existing in the prior art.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0031] As Figures 1 to 3As shown in the figure, this embodiment provides an ocean multi-parameter profiling instrument 100, which includes a sealed cabin 101, a temperature sensor 102, a conductivity sensor 103, a pressure sensor 104, a pH sensor 105, and an acquisition and control circuit board 11. The acquisition and control circuit board 11 is arranged inside the sealed cabin 101. The temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105 all adopt modular design. Each sensor module is detachably installed on the sealed cabin 101 through a watertight connector, which facilitates the independent disassembly and assembly of each sensor and is convenient for maintenance. At the same time, in order to support the plug-and-play of each sensor, the ocean multi-parameter profiling instrument 100 adopts an automatic addressing technology, enabling each sensor to automatically identify, configure, and operate after connection. Each sensor module of the temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105 is built-in with an independent power supply and signal conditioning circuit, supporting hot-plug operation, which can improve the system compatibility and maintenance efficiency. The main controller of the acquisition and control circuit board 11 sends a broadcast command through the communication bus, automatically detects the newly connected sensor module, and performs dynamic address allocation based on the unique identity (MAC address or UUID) to avoid address conflicts. At the same time, each sensor module of the temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105 is built-in with a standardized description file (EDS), which contains metadata such as sensor type, range, and calibration parameters, enabling the main controller to automatically parse and load the corresponding driver without manual configuration. The entire ocean multi-parameter profiling instrument 100 adopts a hot-plug detection mechanism. Through the voltage monitoring and interrupt trigger circuit, it can perceive the connection or disconnection status of each sensor module in real time and dynamically update the device list. At the same time, the acquisition and control circuit board 11 adopts an adaptive power management mechanism. Through the soft start circuit and overcurrent protection, it realizes current matching and avoids instantaneous impact, which can improve the stability of the measuring instrument system. This design can achieve the rapid deployment and flexible expansion of each sensor module in the ocean multi-parameter profiling instrument 100, and can greatly shorten the repair and maintenance cycle.

[0032] In some feasible embodiments, the sealed cabin 101 includes a sealed cylinder 10, a head end cover 8, and a tail end cover 13. The sealed cylinder 10 is preferably a cylindrical sealed cylinder. The head end cover 8 and the tail end cover 13 are respectively fixed to the axial ends of the sealed cylinder 10 by bolts. And O-rings are arranged between the head end cover 8 and the sealed cylinder 10, and between the tail end cover 13 and the sealed cylinder 10 to achieve reliable sealing of the head end cover 8 and the tail end cover 13 on the sealed cylinder 10. A circuit board bracket 9 is arranged inside the sealed cylinder 10, and the acquisition and control circuit board 11 is installed on the circuit board bracket 9 by screws. Four watertight connectors 7 of the cabin are fixed on the head end cover 8, which are respectively used for the installation of the temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105.

[0033] In some feasible embodiments, the pressure sensor 104 preferably adopts a silicon piezoresistive pressure sensor. The pressure measurement uses the silicon piezoresistive principle, and the pressure value is calculated by using the resistance change of the Wheatstone bridge on the silicon piezoresistive chip, which has the characteristics of small volume, fast response and high precision. Specifically, the pressure sensor 104 includes a pressure buffer plug 1, a pressure sealing cylinder 2, a pressure probe 3, a pressure measurement circuit board 4, a pressure end cover 5 and a pressure watertight connector 26. The pressure buffer plug 1 is installed at the front end port of the pressure sealing cylinder 2 through a thread, and is used to buffer the impact of water flow and improve the pressure measurement accuracy; the pressure probe 3 is installed inside the pressure sealing cylinder 2, and an O-ring is used for reliable sealing between the pressure probe 3 and the inner wall of the pressure sealing cylinder 2. The pressure probe 3 is close to the pressure buffer plug 1, and a water inlet hole is opened in the center of the pressure buffer plug 1. The water entering the water inlet hole can directly contact the pressure probe 3, so that the pressure probe 3 can complete the measurement of the water pressure; the pressure measurement circuit board 4 is arranged inside the pressure sealing cylinder 2 and is arranged close to the tail end of the pressure sealing cylinder 2. The pressure probe 3 is communicatively connected to the pressure measurement circuit board 4; the pressure end cover 5 is fixed to the rear end port of the pressure sealing cylinder 2 by screws, and an O-ring is used for reliable sealing between the two; the pressure measurement circuit board 4 is fixedly inserted into the front end of the pressure end cover 5 through a copper column. The pressure watertight connector 26 is externally arranged on the pressure sealing cylinder 2, and an external thread section is arranged at the front end of the pressure watertight connector 26. The pressure watertight connector 26 is threadedly fixed in the rear end threaded hole of the pressure end cover 5 through the external thread section, and an O-ring is used for reliable sealing between the pressure watertight connector 26 and the pressure end cover 5. The pressure sensor 104 is connected to a corresponding cabin watertight connector 7 through the pressure watertight connector 26 for power supply and data transmission.

[0034] In some feasible embodiments, the conductivity sensor 103 preferably adopts a seven-electrode conductivity sensor. The conductivity measurement is based on the seven-electrode principle. By applying an alternating current signal and measuring the voltage and current changes between the electrodes, the conductivity is calculated. The seven-electrode design can effectively eliminate the polarization effect and capacitance effect and is suitable for wide-range measurement. Specifically, the conductivity sensor 103 includes a conductivity probe 21, a conductivity sealed cylinder, a conductivity measurement circuit board, a conductivity end cap, and a conductivity watertight connector. The conductivity probe 21 is fixed to the conductivity sealed cylinder, and the two are reliably sealed by an O-ring. The conductivity measurement circuit board is arranged inside the conductivity sealed cylinder and is communicatively connected to the conductivity probe 21; the conductivity end cap is fixed to the rear end port of the conductivity sealed cylinder by screws, and the two are reliably sealed by an O-ring; the conductivity measurement circuit board is fixedly inserted into the front end of the conductivity end cap through a copper column. The conductivity watertight connector is externally disposed on the conductivity sealed cylinder, and the front end of the conductivity watertight connector is provided with an external thread section. The conductivity watertight connector is threadedly fixed to the rear threaded hole of the conductivity end cap through the external thread section, and the conductivity watertight connector and the conductivity end cap are reliably sealed by an O-ring. The conductivity sensor 103 is connected to a corresponding watertight connector 7 of a cabin through the conductivity watertight connector for power supply and data transmission.

[0035] In some feasible embodiments, the temperature sensor 102 preferably adopts a thermistor sensor. The temperature measurement uses a thermistor as a sensitive element, and the temperature is calculated through the change of the resistance value. Specifically, the temperature sensor 102 includes a temperature sealed cylinder, a temperature probe 20, a temperature protection cover 19, a temperature measurement circuit board, a temperature end cap, and a temperature watertight connector. The temperature probe 20 is fixed to the front end of the temperature sealed cylinder, and the two are reliably sealed by a rubber plug; the temperature protection cover 19 is sleeved outside the temperature probe 20 to protect the temperature probe 20, and the temperature protection cover 19 is fixed to the temperature sealed cylinder by screws. The temperature measurement circuit board is arranged inside the temperature sealed cylinder and is communicatively connected to the temperature probe 20; the temperature end cap is fixed to the rear end port of the temperature sealed cylinder by screws, and the two are reliably sealed by an O-ring; the temperature measurement circuit board is fixedly inserted into the front end of the temperature end cap through a copper column. The temperature watertight connector is externally disposed on the temperature sealed cylinder, and the front end of the temperature watertight connector is provided with an external thread section. The temperature watertight connector is threadedly fixed to the rear threaded hole of the temperature end cap through the external thread section, and the temperature watertight connector and the temperature end cap are reliably sealed by an O-ring. The temperature sensor 102 is connected to a corresponding watertight connector 7 of a cabin through the temperature watertight connector for power supply and data transmission.

[0036] In some feasible embodiments, the pH sensor 105 preferably adopts a pH combined electrode sensor. The pH measurement uses a combination of a glass electrode and a reference electrode, and the pH value is calculated by measuring the potential difference between the two. The high-performance electrode ensures the accuracy and stability of the pH value measurement. Specifically, the pH sensor 105 includes a pH sealed cylinder, a pH protection plate 22, a glass electrode 23, a support column 24, a reference electrode 25, a pH measurement circuit board, a pH end cap, and a pH watertight connector; the glass electrode 23 and the reference electrode 25 are fixed to the front end of the pH sealed cylinder and are reliably sealed by O-rings and epoxy glue; the support column 24 is fixed to the front end of the pH sealed cylinder by threads, and the glass electrode 23, the support column 24, and the reference electrode 25 are parallel. The pH protection plate 22 is fixed to the end of the support column 24 to protect the glass electrode 23 and the reference electrode 25. Specifically, the pH protection plate 22 is preferably a circular protection plate, and it is fixed to the front end of the pH sealed cylinder by 2 to 3 evenly distributed support columns 24. The pH measurement circuit board is arranged in the pH sealed cylinder and is communicatively connected to the glass electrode 23 and the reference electrode 25; the pH end cap is fixed to the rear end port of the pH sealed cylinder by screws, and the two are reliably sealed by an O-ring; the pH measurement circuit board is fixedly inserted into the front end of the pH end cap through a copper column. The pH watertight connector is externally arranged on the pH sealed cylinder, and an external thread section is provided at the front end of the pH watertight connector. The pH watertight connector is threadedly fixed to the rear threaded hole of the pH end cap through this external thread section, and the pH watertight connector and the pH end cap are reliably sealed by an O-ring. The pH sensor 105 is connected to a corresponding cabin watertight connector 7 through the pH watertight connector for power supply and data transmission.

[0037] In some feasible embodiments, as Figure 2 shown, four cabin watertight connectors 7 are evenly embedded in the head end cap 8. To ensure the sealing performance, it is preferred that each cabin watertight connector 7 and the head end cap 8 are reliably sealed by an O-ring.

[0038] In some feasible embodiments, as Figure 2 and Figure 3As shown in the figure, in order to ensure the secure installation of each sensor module and stable signal transmission, it is preferred that a cylindrical watertight connector lock 6 is sleeved at the rear end of the watertight connector of each sensor module. A snap ring is provided at the front end port of the watertight connector lock 6, and a raised step adapted to the snap ring is provided on the watertight connector of each sensor module; an external thread is provided at the rear end of the watertight connector lock 6. At the same time, internal threads are provided on the inner walls of the mounting holes of each mounting cabin watertight connector 7 of the head end cover 8, and the rear end of the watertight connector lock 6 is threadedly connected to the aforementioned mounting hole. Taking the connection between the pressure watertight connector 26 and the corresponding cabin watertight connector 7 as an example, first pass the pressure watertight connector 26 through the watertight connector lock 6, then threadedly fasten the front end of the pressure watertight connector 26 to the pressure end cover 5, and then screw the watertight connector lock 6 into the mounting hole of the head end cover 8. After the watertight connector lock 6 is tightened with the head end cover 8, the pressure watertight connector 26 just completes the docking with the cabin watertight connector 7. At the same time, the snap ring of the watertight connector lock 6 is in concave-convex fit with the raised step on the outside of the pressure watertight connector 26, and the watertight connector lock 6 plays a role in pressing and preventing loosening of the pressure watertight connector 26, which can ensure the connection reliability between the pressure watertight connector 26 and the corresponding cabin watertight connector 7. Conversely, when disassembly is required, unscrew the watertight connector lock 6 in the reverse direction to separate the pressure watertight connector 26 from the corresponding cabin watertight connector 7. The disassembly and assembly methods of the watertight connectors of the remaining sensors and the cabin watertight connector 7 are the same as those of the above-mentioned pressure watertight connector 26 and will not be elaborated here. It should be noted that the cabin watertight connector 7 and the watertight connectors of each sensor are both finished products, and the connection between them is often a cylindrical plug-in connection. Therefore, the tightening and unscrewing actions of the watertight connector lock 6 do not affect the plug-in fit between the cabin watertight connector 7 and the watertight connectors of each sensor.

[0039] In some feasible embodiments, the marine multi-parameter profiler 100 further includes a GNSS positioning module. The GNSS positioning module is disposed within the sealed cabin 101 and is communicatively connected to the acquisition control circuit board 11. The GNSS positioning module mainly has the functions of GNSS positioning and pressure zero marking. When the profiler is turned on and the pressure measurement value of the pressure sensor 104 is lower than the set value, the GNSS positioning module will immediately search for time and position data. When positioning is obtained, the signal lamp of the GNSS positioning module will flash green. After obtaining an effective position, the signal lamp of the GNSS positioning module will switch to a constant green light. At this time, the acquisition control circuit board 11 records and stores the longitude and latitude information of the current position. At each GNSS positioning point, the acquisition control circuit board 11 records a pressure reading and sets it as the pressure zero point of the current position. This pressure value is stored in dbar (a unit of pressure), which provides a reference value for subsequent pressure data measurement. In actual measurement, the pressure data recorded by the acquisition control circuit board 11 are all the differences relative to this pressure zero point to improve the accuracy of pressure measurement. During actual application, the marine multi-parameter profiler 100 will continuously update its GNSS positioning points until it is deployed in water. After exceeding the pressure set value, the GNSS positioning module will automatically turn off the positioning and signal lamp display functions. Since the pressure zero points in the air at different positions are different, the pressure zero marking function of the GNSS positioning module greatly improves the accuracy of pressure profile measurement. The GNSS positioning module includes, but is not limited to, a GPS positioning module.

[0040] In some feasible embodiments, the marine multi-parameter profiler 100 further includes a Bluetooth wireless transmission module. The Bluetooth wireless transmission module is disposed within the sealed cylinder 10 and is communicatively connected to the acquisition control circuit board 11. When the instrument is turned on and the pressure measurement value of the pressure sensor 104 is less than the set value, the profiler will automatically turn on the Bluetooth wireless transmission module for pairing and wirelessly communicate with the host computer to start transmitting measurement data and instrument information, realizing the wireless data playback function. A data playback interface can also be specifically configured on the battery compartment 12. The data playback interface is communicatively connected to the acquisition control circuit board 11. When wireless signals cannot be transmitted, the host computer can also be connected to the data playback interface through a cable to realize the wired transmission and playback of measurement data and instrument information.

[0041] In some feasible embodiments, the marine multi-parameter profiler 100 further includes a rechargeable battery compartment 12. The battery compartment 12 is disposed within the sealed cylinder 10 and has a power supply function, capable of supplying power to each sensor module, the acquisition control circuit board 11, the Bluetooth wireless transmission module, and the GNSS positioning module. Such as Figure 2As shown, a rechargeable battery is arranged in the battery compartment 12. The battery compartment 12 is arranged close to the tail end cover 13. The aforementioned acquisition control circuit board 11 is located between the circuit board support 9 and the battery compartment 12, and the front and rear ends of the acquisition control circuit board 11 are respectively fixed to the circuit board support 9 and the battery compartment 12 by screws. The sealed cabin body 101 is also provided with a charging interface for charging the battery compartment 12.

[0042] In some feasible embodiments, the above-mentioned charging interface and data playback interface can be integrated into one interface. Specifically, the interface can be selected in the structural form of a watertight connector. Specifically, as Figure 2 shown, one end of the external watertight connector 18 is threadedly connected to the center of the tail end cover 13, and a reliable seal is achieved between the external watertight connector 18 and the tail end cover 13 through an O-ring. The external watertight connector 18 is connected to a matching cable, and the battery compartment 12 can be charged and data can be transmitted by wire.

[0043] In some feasible embodiments, the Bluetooth wireless transmission module is provided with a Bluetooth signal lamp. Correspondingly, the battery compartment 12 is provided with a power signal lamp. The signal lamps of the GNSS positioning module, the Bluetooth signal lamp, and the power signal lamp are all preferably LED indicator lamps 142. And preferably, the LED indicator lamps 142 of each module are integrated with the measuring instrument switch on the switch and LED circuit board 14. The switch and LED circuit board 14 are communicatively connected to the aforementioned acquisition control circuit board 11. Specifically, as Figure 2 shown, four Hall switches 141 and four LED indicator lamps 142 are evenly distributed on the switch and LED circuit board 14. The four LED indicator lamps 142 are respectively a GNSS signal lamp, a Bluetooth signal lamp, a power signal lamp, and an instrument power-on status signal lamp. The switch and LED circuit board 14 is a circular board. The four Hall switches 141 and the four LED indicator lamps 142 are evenly distributed along the circumference, and the LED indicator lamps 142 and the Hall switches 141 are arranged at intervals in an alternating manner, that is, the interval angle between every two adjacent LED indicator lamps 142 is 90 degrees, and the interval angle between every two adjacent Hall switches 141 is also 90 degrees. The switch and LED circuit board 14 is fixed to the inner end face of the tail end cover 13 by screws. Each Hall switch 141 and each LED indicator lamp 142 are sequentially installed in the installation holes of the tail end cover 13. A sapphire window 15 is embedded and installed on the outer end face of the tail end cover 13. The state of the LED indicator lamp 142 can be clearly observed through the sapphire window 15. The sapphire window 15 is reliably sealed with the tail end cover 13 through two O-rings. The sapphire window 15 can be provided with four, corresponding to the four LED indicator lamps 142 one by one; or, the sapphire window 15 can also be set as an annular window structure, which can cover the four LED indicator lamps 142 at the same time, as Figure 2 and Figure 6 shown, the sapphire window 15 adopts the annular window structure. As Figure 2 andFigure 6 As shown, the cabin gland 17 is fixed to the outer end face of the tail end cover 13 by screws to axially limit the sapphire window 15. The cabin gland 17 is an annular gland, which is coaxially arranged with the switch and the LED circuit board 14 and is close to the outer edge of the switch and the LED circuit board 14. After the cabin gland 17 is fixed, it mainly presses the sapphire window 15 through the inner edge to avoid blocking the sapphire window 15. Four ball studs are provided on the outer side wall of the cabin gland 17 for limiting the rotary switch 16. As Figure 5 shown, the rotary switch 16 is provided with four blind holes and four through holes 161. The four blind holes and the four through holes 161 are evenly distributed along the circumference, and the blind holes and the through holes are arranged alternately at intervals; among them, magnets are embedded in the four blind holes for triggering the Hall switch 141. The four through holes 161 are used to align with the four LED indicators 142 respectively through the sapphire window 15 after the Hall switch 141 is triggered (that is, after the measurer is turned on) to display the states of the respective LED indicators 142, so as to facilitate directly observing the respective LED indicators 142 from the outside of the instrument; the rotary switch 16 is sleeved outside the cabin gland 17, and four grooves are provided on the inner wall of the rotary switch 16. The rotary switch 16 is fixed to the outer circumference of the cabin gland 17 by respectively engaging the four grooves with the four ball studs in a concave-convex manner. At the same time, the rotary switch 16 can rotate relative to the cabin gland 17 through the sliding and guiding cooperation of the grooves and the ball studs. By rotating the rotary switch 16, the magnet can be brought closer to or farther away from the Hall switch 141 to trigger the Hall switch 141 and turn on the measurer, or turn off the Hall switch 141, thereby turning off the measurer. Using the above-mentioned rotary switch 16 to turn on and off the measurer only requires a 90-degree rotation, which is convenient for operation. The outer wall of the rotary switch 16 is octagonal in shape and has an appropriate diameter size, which is convenient for users to rotate and operate. Clear indications are provided on the outer walls of both the rotary switch 16 and the sealed cylinder 10 to facilitate users to judge the rotation direction and angle. The external watertight connector 18 penetrates through the rotary switch 16.

[0044] Before deploying the ocean multi-parameter profiler 100, it is necessary to judge the instrument information according to the signal lights of each module. The Bluetooth signal light, the battery level signal light, and the GNSS positioning signal light are all green and constantly on, indicating that the Bluetooth connection is normal, the positioning signal has been obtained, and the battery is in good condition, and it is ready for deployment. Users can timely evaluate the usage duration according to the instrument battery information. The GNSS positioning module, Bluetooth, and all signal lights are disabled when the pressure is below the set value (for example, when the pressure measurement value of the pressure sensor 104 exceeds 2 dbar) to save power. This situation generally occurs when the measurer sinks below the water surface; when the measurer is close to or floating on the water surface, the GNSS positioning module, Bluetooth, and all signal lights are normally enabled.

[0045] In some feasible embodiments, the marine multi-parameter profiler 100 also has a sensor intelligent evaluation function. That is, according to the instrument evaluation status (green, yellow, red), the profiler can automatically prompt whether calibration or return to the factory for repair is required, ensuring that each sensor is always in the best working state, thereby guaranteeing the accuracy of measurement data and the reliability of the instrument.

[0046] Generally, the calibration period of the temperature sensor 102, conductivity sensor 103, and pressure sensor 104 is 1 year. The user can set the latest calibration date. The upper computer software of this profiler can evaluate according to the on-site measurement data of the temperature, conductivity, and pressure sensors and the calibration period. The instrument status is displayed as red, yellow, or green: Green indicates that the sensor does not need to be returned to the factory for calibration, and the measurement data used to evaluate its performance status are all within the limits defined by the factory; Yellow indicates that the measurement data used to evaluate its performance status are all within the limits defined by the factory, but it needs to be returned to the factory for calibration; Red indicates that the measurement data used to evaluate its performance status exceed the limits defined by the factory, and this sensor needs to be returned to the factory for repair or detection. The specific judgment principles are as follows: 1. Temperature sensor 102: Evaluate the sensor status based on the measurement data of the temperature sensor 102 and the calibration period. The scores are divided into three states: green, yellow, and red: (1) Green: The sensor is in good condition and meets the conditions: The sensor calibration date is within 1 year (current date - latest calibration date ≤ 365 days); The proportion of valid data in the temperature profile measurement ≥ 90%; The valid data in the temperature profile measurement does not exceed the instrument measurement range of -5°C to +35°C; (2) Yellow: The sensor status requires return to the factory for calibration and meets the conditions: The sensor calibration date exceeds 1 year (current date - latest calibration date > 365 days); The proportion of valid data in the temperature profile measurement ≥ 90%; The valid data in the temperature profile measurement does not exceed the instrument measurement range of -5°C to +35°C; (3) Red: The sensor status requires return to the factory for repair and meets the conditions (meeting any one): The proportion of valid data in the temperature profile measurement < 90%; The valid data in the temperature profile measurement exceeds the instrument measurement range of -5°C to +35°C.

[0047] Among them, the definition and calculation method of the proportion of valid data are as follows: Quantity of valid data: When the deviation between the current measurement data and its adjacent measurement values (25 values before and after by agreement) is not greater than 3 times the standard deviation of the adjacent measurement values, the current measurement data is considered valid, and the total number of valid data is the quantity of valid data.

[0048] Indicator Definition: The ratio of valid data volume refers to the ratio of the valid data volume to the theoretical data volume during a complete profile measurement process, after eliminating gross error data according to the error analysis method.

[0049] Calculation Formula: Theoretical data volume = Sampling frequency × Working time; Valid data volume = The data volume after eliminating gross error, generally achieved by means of search and counting; Ratio of valid data volume = Valid data volume / Theoretical data volume.

[0050] Investigation Method: For the original data (temperature, conductivity, pressure) throughout the sea trial, after eliminating gross error according to the 3-sigma rule, calculate the valid data volume, calculate the theoretical data volume based on the start and end times of the sea trial process data, and count the proportion of the valid data volume in the theoretical data volume.

[0051] 2. Conductivity Sensor 103: Based on the measurement data and calibration period of conductivity sensor 103, evaluate the sensor status, and the scores are divided into three statuses: green, yellow, and red: (1) Green: The sensor is in good condition, meeting the conditions: The sensor calibration date is within 1 year (Current date - Latest calibration date ≤ 365 days); The ratio of valid data in the conductivity profile measurement ≥ 90%; The valid data in the conductivity profile measurement does not exceed the instrument measurement range of 0 - 70 mS / cm; (2) Yellow: The sensor status requires factory calibration, meeting the conditions: The sensor calibration date exceeds 1 year (Current date - Latest calibration date > 365 days); The ratio of valid data in the conductivity profile measurement ≥ 90%; The valid data in the conductivity profile measurement does not exceed the instrument measurement range of 0 - 70 mS / cm; (3) Red: The sensor status requires factory repair, meeting the conditions (meeting any one): The ratio of valid data in the conductivity profile measurement < 90%; The valid data in the conductivity profile measurement exceeds the instrument measurement range of 0 - 70 mS / cm.

[0052] 3. Pressure Sensor 104: Based on the measurement data and calibration period of pressure sensor 104, evaluate the sensor status, and the scores are divided into three statuses: green, yellow, and red: (1) Green: The sensor is in good condition, meeting the conditions: The sensor calibration date is within 1 year (Current date - Latest calibration date ≤ 365 days); The ratio of valid data in the pressure profile measurement ≥ 90%; The valid data in the pressure profile measurement does not exceed the instrument measurement range; The zero drift in air of the pressure does not exceed the instrument measurement accuracy.

[0053] (2) Yellow: The sensor status requires factory calibration, meeting the conditions: The sensor calibration date exceeds 1 year (current date - latest calibration date > 365 days), or the zero drift in the pressure air exceeds the instrument measurement accuracy; the proportion of valid data in the pressure profile measurement ≥ 90%; the valid data in the pressure profile measurement does not exceed the instrument measurement range.

[0054] (3) Red: The sensor status requires factory repair, meeting the conditions (meeting any one of them): The proportion of valid data in the pressure profile measurement < 90%; the valid data in the pressure profile measurement exceeds the instrument measurement range.

[0055] Due to the aging of the glass electrode 23, the potential change of the reference electrode 25, the accumulation of pollutants, and the consumption of the electrolyte in the pH sensor 105, the measured value of the sensor may gradually deviate from the true pH value. Therefore, it is necessary to calibrate and evaluate regularly to ensure the measurement accuracy, compensate for the sensor drift, and extend the service life. The upper computer software of this instrument can evaluate based on the measurement and calibration data of the pH sensor, and the instrument status is displayed in red, yellow, or green: Green indicates that the sensor does not require calibration, and all parameters used to evaluate its performance status are within the limits defined by the factory; Yellow indicates that all parameters used to evaluate its performance status are within the limits defined by the factory, but calibration is required; Red indicates that all parameters used to evaluate its performance status are not within the range specified by the factory, and this sensor needs to be sent back to the factory for repair or testing. The specific judgment criteria are as follows: (1) Green: The sensor status is good, meeting the conditions: The errors at the three calibration points (the difference between the measured value of the sensor in the standard buffer solution (such as pH 4, 7, 10) and the standard value) are all within ±0.05; the pH profile measurement data does not exceed the instrument measurement range of 0 - 14; (2) Yellow: The sensor requires on-site calibration, meeting the conditions: At least one calibration point error is between ±0.05 and ±0.2; the pH profile measurement data does not exceed the instrument measurement range of 0 - 14; (3) Red: The sensor requires factory overhaul or replacement, meeting the conditions (meeting any one of them): At least one calibration point error is greater than ±0.2 pH; the pH profile measurement data exceeds the instrument measurement range of 0 - 14.

[0056] This multi-parameter measuring instrument is equipped with two portable calibration cups, which can be used for on-site calibration and measurement. To obtain accurate pH calibration results, thoroughly rinse the calibration cup with water, and then rinse it with a small amount of the sensor calibration standard solution to be calibrated. Pour out the rinsing calibration solution, and then refill the calibration cup with unused standard solution, and then start the instrument calibration. It is recommended that users use one measuring cup only for calibration and the other for on-site measurement, which will greatly ensure the cleanliness and calibration accuracy during the calibration process.

[0057] In summary, the marine multi-parameter profiler 100 proposed in this solution integrates the measurement functions of four parameters: conductivity, pressure, temperature, and pH, and uses a variety of advanced principles to achieve high-precision and high-stability measurements. In addition, this type of instrument adopts an intelligent, integrated, and self-contained design, which can operate independently for a long time and improve the observation efficiency. The specific beneficial effects are as follows: (1) Adopting a modular design, each sensor probe can be calibrated and tested independently, with convenient replacement, plug-and-play, greatly reducing the maintenance cycle and cost, and solving the problems of long maintenance cycle and high cost of the whole profiler, which is not conducive to large-scale popularization and application.

[0058] (2) A new GNSS positioning module is added. When the device is turned on, it automatically searches for and records time, position data, and the longitude and latitude of the current station. It has a fast response and high accuracy, realizing the intelligence of data acquisition, recording, and observation, improving the accuracy of pressure profile measurement, and solving the problems that when using traditional profilers, the longitude and latitude information and observation time of each station need to be manually recorded, and the subsequent data sorting process is cumbersome, which is not conducive to the efficient analysis and collaborative processing of data.

[0059] (3) A Bluetooth wireless transmission module is added. When the instrument emerges from the water surface, it can automatically transmit data and monitor status information such as battery power in real time, realizing the intelligence of data acquisition, recording, and observation. Without retrieving the instrument, the status information and measurement data of the profiler can be obtained, which is conducive to quickly and timely obtaining data of each observation station and improving the observation efficiency.

[0060] (4) For traditional profilers, turning on and off the machine needs to be done by short-circuiting the watertight plug, using an external magnet, etc., and judging the successful startup by the continuous beeping sound of the instrument. This operation process is relatively complex and difficult to perform in bad sea conditions. In a scenario with a large environmental background noise, it is easy to interfere with the user's judgment of the startup status. In this solution, through a clever structural design, the tail end cover can be rotated 90 degrees to turn on the machine, with simple operation, and is equipped with a user-friendly LED indicator, which can clearly display the startup status, GNSS, battery, and Bluetooth status, without being interfered by environmental noise, greatly improving the user operation experience.

[0061] (5) This profiler has an intelligent evaluation function. According to the evaluation status of the instrument (green, yellow, red), the system can automatically prompt whether calibration or factory repair is required, ensuring that each sensor is always in the best working state, thus guaranteeing the accuracy of measurement data and the reliability of the instrument.

[0062] In summary, the marine multi-parameter profiler 100 of this solution has been greatly improved in terms of modularization, usability, and intelligent design compared with the existing technology.

[0063] It should be noted that the structures, proportions, sizes, etc. depicted in the accompanying drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0064] Specific examples are used in the present invention to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, there will be changes in the specific implementation manners and application scopes according to the idea of the present invention. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An ocean multi-parameter profiling instrument, characterized in that, It includes a sealed cabin, a temperature sensor, a conductivity sensor, a pressure sensor, a pH sensor, a GNSS positioning module, a battery compartment, a switch assembly and an acquisition control circuit board. The acquisition control circuit board is arranged inside the sealed cabin. The temperature sensor, the conductivity sensor, the pressure sensor and the pH sensor are respectively installed on the sealed cabin in a pluggable manner through a watertight connector. Moreover, the temperature sensor, the conductivity sensor, the pressure sensor and the pH sensor all have built-in standardized description files and independent power supply and signal conditioning circuits. The main controller of the acquisition control circuit board can send broadcast instructions through a communication bus to automatically detect and drive newly connected sensors; the GNSS positioning module is arranged inside the sealed cabin and is communicatively connected to the acquisition control circuit board. The GNSS positioning module has GNSS positioning function and pressure zero marking function; the battery compartment is arranged inside the sealed cabin and is communicatively connected to the acquisition control circuit board. The acquisition control circuit board uses an adaptive power management mechanism to monitor and manage the power of the battery compartment; the switch assembly is used to turn on and off the measuring instrument and can display the usage status of the measuring instrument through an indicator light.

2. The ocean multi-parameter profiling instrument according to claim 1, characterized in that, The sealed cabin includes a sealed cylinder body, a head end cover and a tail end cover. The head end cover and the tail end cover are respectively and hermetically installed at both axial ends of the sealed cylinder body; a circuit board support is arranged inside the sealed cylinder body, and the acquisition control circuit board is installed on the circuit board support; four cabin watertight connectors are fixed on the head end cover, and the temperature sensor, the conductivity sensor, the pressure sensor and the pH sensor are respectively installed on the corresponding cabin watertight connectors in a pluggable manner through watertight connectors.

3. The ocean multi-parameter profiling instrument according to claim 2, wherein, The pressure sensor is a silicon piezoresistive pressure sensor. A pressure watertight connector is arranged at the rear end of the silicon piezoresistive pressure sensor. The silicon piezoresistive pressure sensor is installed on the corresponding cabin watertight connector in a pluggable manner through the pressure watertight connector; the conductivity sensor is a seven-electrode conductivity sensor. A conductivity watertight connector is arranged at the rear end of the seven-electrode conductivity sensor. The seven-electrode conductivity sensor is installed on the corresponding cabin watertight connector in a pluggable manner through the conductivity watertight connector; the temperature sensor is a thermistor sensor. A temperature watertight connector is arranged at the rear end of the thermistor sensor. The thermistor sensor is installed on the corresponding cabin watertight connector in a pluggable manner through the temperature watertight connector; the pH sensor is a pH composite electrode sensor. A pH watertight connector is arranged at the rear end of the pH composite electrode sensor. The pH composite electrode sensor is installed on the corresponding cabin watertight connector in a pluggable manner through the pH watertight connector.

4. The ocean multi-parameter profiling instrument according to claim 3, wherein, The temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all locked and fixed to the head end cover through watertight connector locks.

5. The marine multi-parameter profiling instrument according to claim 4, characterized in that, The four cabin watertight connectors are evenly embedded in the head end cover; the watertight connector lock is cylindrical. The rear ends of the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector, and the pH watertight connector are all sleeved with the watertight connector lock. The rear end of the watertight connector lock is threadedly connected to the installation hole of the head end cover where the cabin watertight connector is embedded. A snap ring is provided at the front end port of the watertight connector lock. Protruding steps adapted to the snap ring are provided on the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector, and the pH watertight connector.

6. The ocean multi-parameter profiling instrument according to any one of claims 2-5, characterized in that It further includes a Bluetooth wireless transmission module, which is arranged in the sealed cabin and is communicatively connected to the acquisition control circuit board.

7. The ocean multi-parameter profiling instrument according to claim 6, characterized in that The battery compartment can supply power to the GNSS positioning module, the Bluetooth wireless transmission module, the temperature sensor, the conductivity sensor, the pressure sensor, the pH sensor, and the acquisition control circuit board.

8. The ocean multi-parameter profiling instrument according to claim 7, characterized in that It further includes an external watertight connector, which is threadedly connected to the tail end cover and is communicatively connected to both the acquisition control circuit board and the battery compartment; the external watertight connector can be externally connected to a matching cable to charge the battery compartment or perform wired data transmission.

9. The ocean multi-parameter profiling instrument according to claim 7, characterized in that The switch assembly includes a switch and an LED circuit board, a cabin gland, and a rotary switch. Four Hall switches and four LED indicators are evenly distributed along the circumference on the switch and the LED circuit board, and the LED indicators and the Hall switches are arranged alternately at intervals. The four LED indicators are respectively a GNSS signal lamp, a Bluetooth signal lamp, a power quantity signal lamp, and a power-on status signal lamp; the switch and the LED circuit board are fixed to the inner end face of the tail end cover, and a sapphire window is embedded and installed on the outer end face of the tail end cover to display the status of the LED indicators; the cabin gland is fixed to the outer end face of the tail end cover to axially limit the sapphire window; the rotary switch is sleeved outside the cabin gland and is rotationally matched with the cabin gland. Four blind holes and four through holes are evenly distributed along the circumference on the rotary switch, and the blind holes and the through holes are arranged alternately at intervals. Magnets are embedded in the four blind holes. By rotating the rotary switch, the magnets can be made to approach or move away from the Hall switches to turn on or off the measuring instrument. The four through holes correspond one by one to the four LED indicators.

10. The ocean multi-parameter profiling instrument according to any one of claims 1-5, characterized in that, It further includes a host computer used in conjunction with the marine multi-parameter profiling measuring instrument. An evaluation software is configured on the host computer. The evaluation software can respectively perform intelligent evaluation on the performance status of the temperature sensor, the conductivity sensor, and the pressure sensor according to the on-site measurement data and calibration period of the temperature sensor, the conductivity sensor, and the pressure sensor; the evaluation software can perform intelligent evaluation on the performance status of the pH sensor according to the measurement and calibration data of the pH sensor.

Images