An ocean multi-parameter profile measuring instrument

Abstract

The present invention discloses an ocean multi-parameter profile measuring instrument, which relates to the field of ocean measurement technology. With a modular design, each sensor probe can be calibrated and tested individually, and the replacement is convenient and plug-and-play, which greatly reduces the maintenance cycle and cost. A new GNSS positioning module is added, which automatically searches and records the time, pressure zero point and the longitude and latitude of the current station when the device is turned on. A Bluetooth wireless transmission module is added, and the instrument can automatically transmit data and monitor status information such as power in real time when it is exposed to the water surface, realizing the intelligence of data acquisition, recording and observation. The status information and measurement data of the measuring instrument can be obtained without recovering the instrument, and the data of each observation station can be obtained quickly and timely, improving the observation efficiency. The tail end cover can be turned on by rotating 90 degrees. It is easy to operate and is equipped with a user-friendly LED indicator light, which can clearly display the power-on status, GNSS, battery and Bluetooth status, and is not affected by environmental noise, which greatly improves the user's operating experience.

Description

Technical Field

[0001] The present invention relates to the field of ocean measurement technology, in particular to a novel ocean multi-parameter profile measuring instrument. Background Art

[0002] The ocean multi-parameter profiler integrates temperature, conductivity, pressure and pH sensors, and is used to observe ocean profile environmental parameters, providing data support for marine scientific research and marine ecosystem observation and monitoring.

[0003] During actual use, multi-parameter sensor probes need to be calibrated and maintained regularly. However, in traditional marine multi-parameter profile measuring instruments, the sensor probes are fixedly installed. This means that each sensor probe calibration and maintenance requires the entire measuring instrument to be repaired and maintained, which has a long cycle and high cost, and is not conducive to large-scale promotion and application. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of ocean multi-parameter profile measuring instrument, which adopts a modular design. Each sensor probe can be calibrated and tested individually. It is easy to replace and plug and play, which 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 object, the present invention provides the following solutions:

[0006] The present invention provides an ocean multi-parameter profile measuring instrument, comprising 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 in the sealed cabin, and the temperature sensor, the conductivity sensor, the pressure sensor, and the pH sensor are respectively pluggable and installed with the sealed cabin through a watertight connector. 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 in the sealed cabin and is communicatively connected to the acquisition control circuit board. The GNSS positioning module has a GNSS positioning function and a pressure zero point marking function; the battery compartment is arranged in the sealed cabin and is communicatively connected to 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 open and close the measuring instrument and can display the usage status of the measuring instrument through an indicator light.

[0007] Preferably, the sealed cabin includes a sealing cylinder, a head end cover and a tail end cover, and the head end cover and the tail end cover are respectively sealed and installed on the axial ends of the sealing cylinder; a circuit board bracket is provided in the sealing 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 pluggable and installed with the corresponding cabin watertight connectors through watertight connectors.

[0008] Preferably, the pressure sensor is a silicon piezoresistive pressure sensor, and a pressure watertight connector is provided at the rear end of the silicon piezoresistive pressure sensor, and the silicon piezoresistive pressure sensor is pluggable and installed with the corresponding cabin watertight connector through the pressure watertight connector; the conductivity sensor is a seven-electrode conductivity sensor, and a conductivity watertight connector is provided at the rear end of the seven-electrode conductivity sensor, and the seven-electrode conductivity sensor is pluggable and installed with the corresponding cabin watertight connector through the conductivity watertight connector; the temperature sensor is a thermistor sensor, and a temperature watertight connector is provided at the rear end of the thermistor sensor, and the thermistor sensor is pluggable and installed with the corresponding cabin watertight connector through the temperature watertight connector; the pH sensor is a pH composite electrode sensor, and a pH watertight connector is provided at the rear end of the pH composite electrode sensor, and the pH composite electrode sensor is pluggable and installed with the corresponding cabin watertight connector through the pH watertight connector.

[0009] Preferably, 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 a watertight connector lock.

[0010] Preferably, the four cabin watertight connectors are evenly embedded in the head end cover; the watertight connector lock is cylindrical, and the rear ends of the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all equipped with the watertight connector lock, and the rear end of the watertight connector lock is threadedly connected to the mounting hole of the head end cover in which the cabin watertight connector is embedded, and the front end port of the watertight connector lock is provided with a snap ring, and the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all provided with a raised step adapted to the snap ring.

[0011] Preferably, the ocean multi-parameter profile measuring instrument further includes a Bluetooth wireless transmission module, which is disposed in the sealed cabin and is communicatively connected to the acquisition control circuit board.

[0012] 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.

[0013] Preferably, the ocean multi-parameter profile measuring instrument also includes an external watertight connector, which is threadedly connected to the tail end cover and is communicatively connected to 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.

[0014] Preferably, the switch assembly includes a switch and LED circuit board, a cabin pressure cover and a rotary switch, four Hall switches and four LED indicators are evenly distributed along the circumference on the switch and LED circuit board, and the LED indicators and the Hall switches are staggered at intervals, and the four LED indicators are respectively a GNSS signal light, a Bluetooth signal light, a power signal light and a power-on status signal light; the switch and LED circuit board are fixed to the inner end surface of the tail end cover, and a sapphire window is embedded and installed on the outer end surface of the tail end cover to display the status of the LED indicators; the cabin pressure cover is fixed to the outer end surface of the tail end cover to axially limit the sapphire window; the rotary switch is sleeved on the outside of the cabin pressure cover and rotatably cooperates with the cabin pressure cover, 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 staggered at intervals, and magnets are embedded in the four blind holes. Rotating the rotary switch can make the magnet approach or move away from the Hall switch to turn on or off the measuring instrument, and the four through holes correspond one-to-one to the four LED indicators.

[0015] Preferably, the ocean multi-parameter profile measuring instrument also includes a host computer used in conjunction with the ocean multi-parameter profile measuring instrument, and the host computer is configured with evaluation software. The evaluation software can perform intelligent evaluation on the performance status of the temperature sensor, the conductivity sensor and the pressure sensor according to the field measurement data and calibration cycle of the temperature sensor, the conductivity sensor and the pressure sensor respectively; 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.

[0016] Compared with the existing technology, the present invention has achieved the following technical effects: the ocean multi-parameter profile measuring instrument proposed in the present invention integrates the measurement functions of four parameters: conductivity, pressure, temperature and pH, and each sensor adopts a modular design. Each sensor probe can be calibrated and tested individually, and is easy to replace and plug and play, which greatly reduces the maintenance cycle and cost, and solves the problem that the maintenance cycle of the entire measuring instrument is long and the cost is high, which is not conducive to large-scale promotion and application.

[0017] In some technical solutions disclosed in the present invention, a new GNSS positioning module is added, which automatically searches and records the time, pressure zero point and longitude and latitude of the current station when the device is turned on. It has fast response and high accuracy, realizes the intelligence of data acquisition, recording and observation, and improves the accuracy of pressure profile measurement. It can solve the problem that when using traditional measuring instruments, the longitude and latitude information and observation time of each station need to be manually recorded, and the subsequent data collation process is cumbersome, which is not conducive to efficient analysis and collaborative processing of data.

[0018] In some technical solutions disclosed in the present invention, a Bluetooth wireless transmission module is added, and the instrument can automatically transmit data and monitor status information such as power in real time when it is exposed to the water surface, realizing the intelligence of data acquisition, recording and observation. The measuring instrument status information and measurement data can be obtained without recovering the instrument, which is conducive to quickly and timely obtaining data from each observation station and improving observation efficiency.

[0019] In some technical solutions disclosed in the present invention, through clever structural design, the tail end cover can be turned on by rotating 90 degrees. It is easy to operate and is equipped with user-friendly LED indicators that can clearly display the power-on status, GNSS, battery and Bluetooth status without being disturbed by environmental noise, greatly improving the user operation experience.

[0020] In some technical solutions disclosed in the present invention, the measuring instrument has an intelligent evaluation function. According to the instrument evaluation status (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 condition, thereby ensuring the accuracy of the measurement data and the reliability of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the ocean multi-parameter profile measuring instrument disclosed in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall cross-section of the ocean multi-parameter profiler disclosed in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the installation of each sensor module disclosed in an embodiment of the present invention.

[0025] Figure 4This is a schematic diagram of the structure of the switch and LED circuit board disclosed in an embodiment of the present invention.

[0026] Figure 5 The diagram is a schematic diagram of the structure and installation of a rotary switch disclosed in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure and installation of the sapphire window and pressure cover disclosed in an embodiment of the present invention.

[0028] In the figure, the reference numerals are: 100-ocean 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 cover, 6-watertight connector lock, 7-cabin watertight connector, 8-head end cover, 9-circuit board bracket, 10-sealed cylinder, 11-acquisition control circuit board, 12-battery compartment, 13-tail end cover, 14-switch and LED circuit board, 141-Hall switch, 142-LED indicator, 15-sapphire window, 16-rotary switch, 161-through hole, 17-cabin pressure cover, 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 DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a new type of ocean multi-parameter profile measuring instrument, which adopts a modular design. Each sensor probe can be calibrated and tested individually. It is easy to replace and plug and play, which can greatly reduce the maintenance cycle and cost, so as to solve the problems existing in the prior art.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 3As shown, this embodiment provides an ocean multi-parameter profiler 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 control circuit board 11. The acquisition control circuit board 11 is disposed within the sealed cabin 101. The temperature sensor 102, the conductivity sensor 103, the pressure sensor 104, and the pH sensor 105 all adopt a modular design. Each sensor module is detachably mounted to the sealed cabin 101 via a watertight connector, facilitating independent assembly and disassembly of each sensor and facilitating repair and maintenance. Furthermore, to support plug-and-play operation of each sensor, the ocean multi-parameter profiler 100 employs automatic addressing technology, enabling each sensor to automatically identify, configure, and operate upon connection. Each sensor module, including the temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105, features independent power supplies and signal conditioning circuitry, supporting hot-swappable operation and improving system compatibility and maintenance efficiency. The main controller on the acquisition and control circuit board 11 automatically detects newly connected sensor modules by sending broadcast commands via the communication bus. It dynamically assigns addresses based on their unique identifiers (MAC addresses or UUIDs) to avoid address conflicts. Furthermore, each sensor module, including the temperature sensor 102, conductivity sensor 103, pressure sensor 104, and pH sensor 105, includes a built-in standardized description file (EDS) containing metadata such as sensor type, range, and calibration parameters. This allows the main controller to automatically parse and load the corresponding driver, eliminating the need for manual configuration. The entire ocean multi-parameter profiler 100 utilizes a hot-swappable detection mechanism. Through voltage monitoring and interrupt triggering circuitry, it detects the connection and disconnection status of each sensor module in real time and dynamically updates the device list. Furthermore, the acquisition and control circuit board 11 employs an adaptive power management mechanism, using soft-start circuitry and overcurrent protection to achieve current matching, prevent transient surges, and enhance instrument system stability. This design can realize the rapid deployment and flexible expansion of each sensor module in the ocean multi-parameter profiler 100, and can significantly shorten the repair and maintenance cycle.

[0033] In some feasible embodiments, the sealed capsule 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 provided between the head end cover 8 and the sealed cylinder 10, as well as 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 to the sealed cylinder 10. A circuit board bracket 9 is provided in the sealed cylinder 10, and the acquisition control circuit board 11 is mounted on the circuit board bracket 9 by screws. Four cabin watertight connectors 7 are fixed to the head end cover 8, which are used for the installation of the temperature sensor 102, the conductivity sensor 103, the pressure sensor 104, and the pH sensor 105, respectively.

[0034] In some feasible embodiments, pressure sensor 104 preferably employs a silicon piezoresistive pressure sensor. Pressure measurement utilizes the silicon piezoresistive principle, calculating pressure values ​​using the resistance change of a Wheatstone bridge on a silicon piezoresistive chip. This sensor features a compact size, fast response, and high accuracy. Specifically, 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 cap 5, and a watertight pressure connector 26. The pressure buffer plug 1 is installed on the front end port of the pressure sealing cylinder 2 through threads, which 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 the pressure probe 3 and the inner wall of the pressure sealing cylinder 2 are reliably sealed by an O-ring. The pressure probe 3 is close to the pressure buffer plug 1, and a water inlet is opened in the center of the pressure buffer plug 1. The water entering the water inlet can directly contact the pressure probe 3, so that the pressure probe 3 completes the measurement of the water pressure; the pressure measurement circuit board 4 is arranged in 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 with 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 to reliably seal between the two; the pressure measurement circuit board 4 is fixedly inserted into the front end of the pressure end cover 5 by a copper column. A pressure-tight connector 26 is externally mounted on the pressure-sealing cylinder 2. The front end of the connector 26 is provided with an externally threaded section. This section allows the connector 26 to be threadedly secured to the rear threaded hole of the pressure end cover 5. An O-ring is used to provide a secure seal between the connector 26 and the pressure end cover 5. The pressure sensor 104 is connected to the corresponding cabin watertight connector 7 via the pressure-tight connector 26 for power and data transmission.

[0035] In some feasible implementations, the conductivity sensor 103 preferably adopts a seven-electrode conductivity sensor. The conductivity measurement is based on the seven-electrode principle. The conductivity is calculated by applying an AC signal and measuring the voltage and current changes between the electrodes. The seven-electrode design can effectively eliminate the polarization effect and the capacitance effect, and is suitable for wide-range measurement. Specifically, the conductivity sensor 103 includes a conductivity probe 21, a conductivity sealing cylinder, a conductivity measurement circuit board, a conductivity end cap, and a conductivity watertight connector. The conductivity probe 21 is fixed to the conductivity sealing cylinder, and the two are reliably sealed by an O-ring. The conductivity measurement circuit board is arranged in the conductivity sealing cylinder and is communicatively connected to the conductivity probe 21; the conductivity end cap is fixed to the rear end port of the conductivity sealing cylinder by screws, and an O-ring is used to reliably seal the two; the conductivity measurement circuit board is fixedly inserted into the front end of the conductivity end cap by a copper column. The conductivity watertight connector is externally mounted on the conductivity sealing cylinder. The front end of the connector is provided with an externally threaded section, which is threadedly fixed into the threaded hole at the rear end of the conductivity end cap. An O-ring is used to provide a reliable seal between the connector and the end cap. The conductivity sensor 103 is connected to the corresponding cabin watertight connector 7 via the conductivity watertight connector for power supply and data transmission.

[0036] In some feasible implementations, the temperature sensor 102 preferably adopts a thermistor sensor, in which the temperature measurement uses a thermistor as a sensitive element, and the temperature is calculated by the change in resistance value. Specifically, the temperature sensor 102 includes a temperature sealing cylinder, a temperature probe 20, a temperature protection cover 19, a temperature measurement circuit board, a temperature end cover, and a temperature watertight connector. The temperature probe 20 is fixed to the front end of the temperature sealing cylinder, and the two are reliably sealed by a rubber plug; the temperature protection cover 19 is sleeved on the outside of the temperature probe 20 to protect the temperature probe 20, and the temperature protection cover 19 is fixed to the temperature sealing cylinder by screws. The temperature measurement circuit board is arranged in the temperature sealing cylinder and is in communication connection with the temperature probe 20; the temperature end cover is fixed to the rear end port of the temperature sealing cylinder by screws, and an O-ring is used to reliably seal the two; the temperature measurement circuit board is fixedly inserted into the front end of the temperature end cover by a copper column. The temperature watertight connector is externally mounted on the temperature-sealed cylinder. Its front end is provided with an externally threaded section, which is threadedly secured to the rear threaded hole of the temperature end cap. An O-ring is used to provide a secure seal between the temperature watertight connector and the end cap. Temperature sensor 102 is connected to a corresponding cabin watertight connector 7 via the temperature watertight connector for power and data transmission.

[0037] In some feasible embodiments, the pH sensor 105 preferably adopts a pH composite electrode sensor, and the pH measurement adopts a combination of a glass electrode and a reference electrode. 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 sealing 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 cover and a pH watertight connector; the glass electrode 23 and the reference electrode 25 are fixed to the front end of the pH sealing cylinder and are both reliably sealed by O-rings and epoxy glue; the support column 24 is fixed to the front end of the pH sealing cylinder by threads, and the glass electrode 23, the support column 24 and the reference electrode 25 are parallel, and the pH protection plate 22 is fixed to the end of the support column 24 for protecting the glass electrode 23 and the reference electrode 25. Specifically, the pH protection plate 22 is preferably a circular protection plate, which is fixed to the front end of the pH sealing cylinder by 2 to 3 evenly distributed support columns 24. The pH measurement circuit board is housed within the pH sealing cylinder and is in communication with the glass electrode 23 and the reference electrode 25. The pH end cap is secured to the rear end port of the pH sealing cylinder via screws, with an O-ring used to reliably seal the two. The pH measurement circuit board is fixedly inserted into the front end of the pH end cap via a copper column. The pH watertight connector is externally mounted on the pH sealing cylinder, and the front end of the pH watertight connector is provided with an externally threaded section, through which the pH watertight connector is threadedly secured within the rear end threaded hole of the pH end cap. An O-ring is used to reliably seal the pH watertight connector and the pH end cap. The pH sensor 105 is connected to a corresponding cabin watertight connector 7 via the pH watertight connector for power supply and data transmission.

[0038] Some feasible implementations, such as Figure 2 As shown, four cabin watertight connectors 7 are evenly embedded in the head end cover 8. In order to ensure sealing, it is preferred that each cabin watertight connector 7 and the head end cover 8 are reliably sealed by an O-ring.

[0039] Some feasible implementations, such as Figure 2 and Figure 3As shown, in order to ensure that each sensor module is securely installed and the signal transmission is stable, it is preferred that the rear end of the watertight connector of each sensor module is fitted with a cylindrical watertight connector lock 6, the front end port of the watertight connector lock 6 is provided with a snap ring, and the watertight connector of each sensor module is provided with a raised step that matches the snap ring; the rear end of the watertight connector lock 6 is provided with an external thread, and at the same time, the inner wall of the mounting hole of each cabin watertight connector 7 embedded in the head end cover 8 is provided with an internal thread, 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 screw 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 and the head end cover 8 are tightened, the pressure watertight connector 26 is just docked with the cabin watertight connector 7. At the same time, the snap ring of the watertight connector lock 6 and the raised step on the outside of the pressure watertight connector 26 are matched, and the watertight connector lock 6 plays a role in pressing and preventing the pressure watertight connector 26 from loosening, which can ensure the reliability of the connection between the pressure watertight connector 26 and the corresponding cabin watertight connector 7. Conversely, when disassembly is required, the watertight connector lock 6 can be screwed out in the opposite direction to achieve the separation of the pressure watertight connector 26 and the corresponding cabin watertight connector 7. The assembly and disassembly procedures for the remaining sensor watertight connectors and the cabin watertight connector 7 are similar to those for the pressure watertight connector 26 described above and will not be repeated here. It should be noted that the cabin watertight connector 7 and the watertight connectors of the sensors are finished parts, often with a cylindrical plug-in connection. Therefore, tightening and unscrewing the watertight connector lock 6 does not affect the mating of the cabin watertight connector 7 and the watertight connectors of the sensors.

[0040] In some feasible embodiments, the ocean multi-parameter profiler 100 also includes a GNSS positioning module, which is located within the sealed cabin 101 and communicates with the acquisition and control circuit board 11. The GNSS positioning module primarily provides GNSS positioning and pressure zero-point marking functions. When the instrument is turned on and the pressure measurement value of the pressure sensor 104 falls below a set value, the GNSS positioning module immediately searches for time and location data. When a position fix is ​​obtained, the GNSS positioning module's indicator light flashes green. Upon obtaining a valid position fix, the GNSS positioning module's indicator light switches to solid green, and the acquisition and control circuit board 11 records and stores the current station's latitude and longitude. At each GNSS position fix, the acquisition and control circuit board 11 records a pressure reading and sets it as the pressure zero point for the current position. This pressure value, stored in decibars (dbar), provides a baseline for subsequent pressure data measurements. In actual measurements, the pressure data recorded by the acquisition and control circuit board 11 is the difference relative to this pressure zero point, thereby improving pressure measurement accuracy. During actual use, the marine multi-parameter profiler 100 will continuously update its GNSS position until deployed in water. Once the pressure exceeds a set value, the GNSS positioning module will automatically disable positioning and the signal light display. Because the zero pressure point in air varies at different locations, the GNSS positioning module's zero pressure marking function significantly improves the accuracy of pressure profile measurements. GNSS positioning modules include, but are not limited to, GPS positioning modules.

[0041] In some feasible embodiments, the marine multi-parameter profiler 100 further includes a Bluetooth wireless transmission module, which is disposed within the sealed cylinder 10 and is communicatively connected to the acquisition and control circuit board 11. When the instrument is powered on and the pressure measurement value of the pressure sensor 104 is less than a set value, the instrument automatically activates the Bluetooth wireless transmission module, establishes a wireless communication connection with the host computer, and begins transmitting measurement data and instrument information, thereby enabling wireless data playback. A data playback interface may also be specifically configured on the battery compartment 12, which is communicatively connected to the acquisition and control circuit board 11. When wireless signal transmission is unable to proceed, the host computer may also be connected to the data playback interface via a cable to enable wired transmission and playback of measurement data and instrument information.

[0042] In some feasible implementations, the ocean multi-parameter profiler 100 further includes a rechargeable battery compartment 12, which 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. Figure 2As shown, a rechargeable battery is housed in a battery compartment 12, which is located near the rear end cap 13. The aforementioned acquisition control circuit board 11 is located between the circuit board bracket 9 and the battery compartment 12, with the front and rear ends of the acquisition control circuit board 11 being secured to the circuit board bracket 9 and the battery compartment 12, respectively, via screws. A charging port for charging the battery compartment 12 is also provided on the sealed cabin 101.

[0043] In some feasible implementations, the charging interface and the data playback interface can be integrated into one interface. Specifically, the interface can be in the form of a watertight connector. Specifically, Figure 2 As shown, one end of the external watertight connector 18 is threadedly connected to the center of the tail end cover 13, and the external watertight connector 18 and the tail end cover 13 are reliably sealed by an O-ring. The external watertight connector 18 is connected to the matching cable, which can charge the battery compartment 12 and transmit data by wire.

[0044] In some feasible implementations, the Bluetooth wireless transmission module is equipped with a Bluetooth signal light, and correspondingly, the battery compartment 12 is equipped with a power signal light. The signal light of the GNSS positioning module, the Bluetooth signal light, and the power signal light are preferably LED indicators 142, and preferably, the LED indicators 142 of each module and the measuring instrument switch are integrated on the switch and LED circuit board 14, and the switch and LED circuit board 14 are communicatively connected to the aforementioned acquisition control circuit board 11. Specifically, Figure 2 As shown, the switch and LED circuit board 14 is evenly distributed with four Hall switches 141 and four LED indicators 142. The four LED indicators 142 serve as a GNSS signal light, a Bluetooth signal light, a battery indicator light, and an instrument power-on status indicator light. The switch and LED circuit board 14 is a circular plate, and the four Hall switches 141 and four LED indicators 142 are evenly distributed along the circumference. The LED indicators 142 and Hall switches 141 are staggered, with the angle between each adjacent pair of LED indicators 142 being 90 degrees, and the angle between each adjacent pair of Hall switches 141 also being 90 degrees. The switch and LED circuit board 14 is fixed to the inner end surface of the tail end cap 13 by screws, and each Hall switch 141 and each LED indicator 142 are sequentially embedded in the mounting holes of the tail end cap 13. A sapphire window 15 is embedded in the outer end surface of the tail end cap 13, through which the status of the LED indicators 142 can be clearly observed. The sapphire window 15 is securely sealed to the tail end cap 13 by two O-rings. Four sapphire windows 15 can be provided, and correspond one to one with the four LED indicators 142; or, the sapphire window 15 can also be provided as a ring-shaped window structure, which can cover the four LED indicators 142 at the same time, such as Figure 2 and Figure 6 As shown, the sapphire window 15 adopts an annular window structure. Figure 2 and Figure 6 As shown, the cabin cover 17 is fixed to the outer end surface of the tail end cover 13 by screws to limit the sapphire window 15 axially. The cabin cover 17 is an annular cover, which is coaxially arranged with the switch and LED circuit board 14 and close to the outer edge of the switch and LED circuit board 14. After the cabin cover 17 is fixed, it mainly presses the sapphire window 15 through the inner edge to avoid blocking the sapphire window 15. The outer wall of the cabin cover 17 is provided with four ball screws for realizing the limit of the rotary switch 16. Figure 5 As shown, the rotary switch 16 is provided with four blind holes and four through holes 161, which are evenly distributed along the circumference, and the blind holes and the through holes are staggered at intervals; wherein, magnets are embedded in the four blind holes for triggering the Hall switch 141, and the four through holes 161 are used to align with the four LED indicator lights 142 through the sapphire windows 15 after the Hall switch 141 is triggered (i.e., after the measuring device is turned on), so as to display the status of each LED indicator light 142, so as to facilitate direct observation of each LED indicator light 142 from the outside of the instrument; the rotary switch 16 is sleeved on the outside of the cabin cover 17, and the inner wall of the rotary switch 16 is provided with four grooves, and the rotary switch 16 is fixed to the outer periphery of the cabin cover 17 through the four grooves and the four ball screws respectively. At the same time, the rotary switch 16 can rotate relative to the cabin cover 17 through the sliding guide cooperation of the grooves and the ball screws. Rotating the rotary switch 16 moves the magnet closer to or further from the Hall switch 141, triggering it and turning the meter on, or off. Using the rotary switch 16, turning the meter on and off requires only a 90-degree turn, making it easy to operate. The outer wall of the rotary switch 16 is octagonal, with a convenient diameter, making it easy for the user to rotate. Clear indicators on the outer walls of both the rotary switch 16 and the sealing cylinder 10 facilitate the user's determination of rotation direction and angle. An external watertight connector 18 extends through the rotary switch 16.

[0045] Before deploying the ocean multi-parameter profiler 100, check the instrument's status based on the indicators on each module. If the Bluetooth, battery, and GNSS positioning indicators are all solid green, this indicates a functioning Bluetooth connection, a positioning signal, and a healthy battery, indicating that deployment is possible. This battery level information allows users to quickly assess the instrument's operating life. The GNSS positioning module, Bluetooth, and all indicators are disabled to conserve power when the pressure exceeds the set pressure (for example, when the pressure sensor 104 measures more than 2 decibar). This typically occurs when the instrument is submerged. When the instrument is near or floating on the surface, the GNSS positioning module, Bluetooth, and all indicators are enabled normally.

[0046] In some feasible implementations, the ocean multi-parameter profile measuring instrument 100 also has a sensor intelligent evaluation function, that is, according to the instrument evaluation status (green, yellow, red), the measuring instrument can automatically prompt whether calibration or factory repair is required, ensuring that each sensor is always in the best working condition, thereby ensuring the accuracy of the measurement data and the reliability of the instrument.

[0047] Generally, the calibration cycle of the temperature sensor 102, the conductivity sensor 103, and the pressure sensor 104 is one year. The user can set the latest calibration date. The measuring instrument host software can evaluate the temperature, conductivity, and pressure sensors based on their on-site measurement data and calibration cycle. The instrument status is displayed in red, yellow, or green: green means 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 factory-defined limits; yellow means that the measurement data used to evaluate its performance status are all within the factory-defined limits, but it needs to be returned to the factory for calibration; red means that the measurement data used to evaluate its performance status exceeds the factory-defined limits, and the sensor needs to be returned to the factory for repair or testing. The specific evaluation principles are as follows:

[0048] 1. Temperature sensor 102: Based on the measurement data and calibration period of the temperature sensor 102, the sensor status is evaluated and scored into three states: green, yellow, and red.

[0049] (1) Green: The sensor is in good condition and meets the following conditions: the sensor calibration date is within 1 year (current date - latest calibration date ≤ 365 days); the valid data of the temperature profile measurement accounts for ≥ 90%; the valid data of the temperature profile measurement does not exceed the instrument measurement range of -5℃~+35℃;

[0050] (2) Yellow: The sensor status needs to be returned to the factory for calibration. The following conditions are met: the sensor calibration date is more than 1 year (current date - latest calibration date > 365 days); the valid data percentage of temperature profile measurement is ≥ 90%;

[0051] The effective data of temperature profile measurement does not exceed the instrument measurement range of -5℃~+35℃;

[0052] (3) Red: The sensor status needs to be returned to the factory for repair. The following conditions are met (any one of them): the valid data of the temperature profile measurement is less than 90%; the valid data of the temperature profile measurement exceeds the instrument measurement range of -5℃~+35℃.

[0053] The definition and calculation method of the effective data ratio are as follows:

[0054] Valid data volume: When the deviation between the current measurement data and its adjacent measurement values ​​(the agreed 25 values ​​before and after) is no more than three 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 valid data volume.

[0055] Indicator definition: The effective data volume ratio refers to the ratio of the effective data volume to the theoretical data volume in a complete profile measurement process, under the premise of eliminating gross errors and other data according to the error analysis method.

[0056] Calculation formula:

[0057] Theoretical data volume = sampling frequency × working time;

[0058] Effective data volume = the amount of data after eliminating gross errors, which is generally achieved by searching and counting;

[0059] The proportion of effective data volume = effective data volume / theoretical data volume.

[0060] Investigation method: For the original data (temperature, conductivity, pressure) of the entire sea trial, after eliminating gross errors according to the 3 Sigma rule, the effective data volume is calculated. For the sea trial process data, the theoretical data volume is calculated according to the start and end time, and the proportion of the effective data volume to the theoretical data volume is counted.

[0061] 2. Conductivity sensor 103:

[0062] Based on the measurement data and calibration cycle of the conductivity sensor 103, the sensor status is evaluated and scored into three states: green, yellow, and red:

[0063] (1) Green: The sensor is in good condition and meets the following conditions: the sensor calibration date is within 1 year (current date - latest calibration date ≤ 365 days); the conductivity profile measurement valid data accounts for ≥ 90%; the conductivity profile measurement valid data does not exceed the instrument measurement range of 0~70mS / cm;

[0064] (2) Yellow: The sensor status needs to be returned to the factory for calibration. The following conditions are met: the sensor calibration date is more than 1 year (current date - latest calibration date > 365 days); the conductivity profile measurement valid data accounts for ≥ 90%; the conductivity profile measurement valid data does not exceed the instrument measurement range of 0~70mS / cm;

[0065] (3) Red: The sensor needs to be returned to the factory for repair. The following conditions are met (any one of them): The effective data of the conductivity profile measurement is less than 90%; The effective data of the conductivity profile measurement exceeds the instrument measurement range of 0~70mS / cm.

[0066] 3. Pressure sensor 104:

[0067] Based on the measurement data and calibration cycle of the pressure sensor 104, the sensor status is evaluated and scored into three states: green, yellow, and red:

[0068] (1) Green: The sensor is in good condition and meets the following conditions: the sensor calibration date is within 1 year (current date - latest calibration date ≤ 365 days); the proportion of valid data in pressure profile measurement is ≥ 90%; the valid data in pressure profile measurement does not exceed the instrument measurement range; the zero drift in pressure air does not exceed the instrument measurement accuracy.

[0069] (2) Yellow: The sensor status needs to be returned to the factory for calibration. The following conditions are met: the sensor calibration date is more than 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 is ≥ 90%; the valid data in the pressure profile measurement does not exceed the instrument measurement range.

[0070] (3) Red: The sensor needs to be returned to the factory for repair. The following conditions are met (any one of them): The proportion of valid data in the pressure profile measurement is less than 90%; The valid data in the pressure profile measurement exceeds the measurement range of the instrument.

[0071] The pH sensor 105 may gradually deviate from the true pH value due to aging of the glass electrode 23, changes in the potential of the reference electrode 25, accumulation of contaminants, and consumption of the electrolyte. Therefore, regular calibration and evaluation are required to ensure measurement accuracy, compensate for sensor drift, and extend the service life. The instrument host software can perform evaluation based on the pH sensor measurement and calibration data. The instrument status is displayed in red, yellow, or green: green means that the sensor does not need to be calibrated, and all parameters used to evaluate its performance status are within the factory-defined limits; yellow means that all parameters used to evaluate its performance status are within the factory-defined limits, but calibration is required; red means that all parameters used to evaluate its performance status are not within the factory-specified range, and the sensor needs to be returned to the factory for repair or testing. The specific evaluation criteria are as follows:

[0072] (1) Green: The sensor is in good condition and meets the following conditions: the three calibration point errors (the difference between the sensor's measured value and the standard value in the standard buffer solution (e.g., pH 4, 7, 10)) are all within ±0.05; the pH profile measurement data does not exceed the instrument's measurement range of 0-14;

[0073] (2) Yellow: The sensor needs to be calibrated on site. The following conditions are met: the error of at least one calibration point is between ±0.05 and ±0.2; the pH profile measurement data does not exceed the instrument measurement range of 0 to 14;

[0074] (3) Red: The sensor needs to be returned to the factory for inspection or replacement. The following conditions are met (any one of them): the error of at least one calibration point is greater than ±0.2 pH; the pH profile measurement data exceeds the instrument measurement range of 0~14.

[0075] The multi-parameter meter comes with two portable calibration cups for field calibration and measurement. To obtain accurate pH calibration results, rinse the calibration cups thoroughly with water, then rinse with a small amount of the calibration standard solution for the sensor to be calibrated. Discard the rinse solution, refill the calibration cups with unused standard solution, and then begin instrument calibration. It is recommended that users use one measuring cup only for calibration and the other for field measurements; this will greatly ensure cleanliness and accuracy during the calibration process.

[0076] In summary, the proposed ocean multi-parameter profiler 100 integrates the measurement functions of four parameters: conductivity, pressure, temperature, and pH, and utilizes multiple advanced principles to achieve high-precision and high-stability measurements. Furthermore, this instrument utilizes an intelligent, integrated, and self-contained design, enabling long-term autonomous operation and improving observation efficiency. Specific benefits are as follows:

[0077] (1) With modular design, each sensor probe can be calibrated and tested individually, and is easy to replace and plug-and-play, which greatly reduces the maintenance cycle and cost, and solves the problem of long maintenance cycle and high cost of the measuring instrument, which is not conducive to large-scale promotion and application.

[0078] (2) A new GNSS positioning module has been added. When the device is turned on, it automatically searches and records the time, location data, and the longitude and latitude of the current station. It has a fast response and high accuracy, and realizes the intelligence of data acquisition, recording, and observation, which improves the accuracy of pressure profile measurement. It can solve the problem that when using traditional measuring instruments, the longitude and latitude information and observation time of each station need to be manually recorded, and the subsequent data collation process is cumbersome, which is not conducive to efficient data analysis and collaborative processing.

[0079] (3) A Bluetooth wireless transmission module is added. The instrument can automatically transmit data and monitor status information such as power in real time as soon as it emerges from the water, realizing intelligent data acquisition, recording and observation. The status information and measurement data of the measuring instrument can be obtained without recovering the instrument, which is conducive to quickly and timely obtaining data from each observation station and improving observation efficiency.

[0080] (IV) Traditional measuring instruments require powering on and off using methods such as short-circuiting watertight plugs and external magnets, with a continuous beeping sound from the instrument confirming successful power-up. This process is complex and difficult to perform in rough sea conditions. In environments with high background noise, it can easily interfere with the user's ability to determine the power-on status. However, this solution utilizes a clever structural design that allows the instrument to be powered on by simply rotating the rear end cap 90 degrees. This solution is simple to operate and features user-friendly LED indicators that clearly display the power-on status, GNSS, battery, and Bluetooth status, unaffected by ambient noise, significantly improving the user experience.

[0081] (5) The measuring instrument has an intelligent evaluation function. According to the instrument evaluation status (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 condition, thereby ensuring the accuracy of measurement data and the reliability of the instrument.

[0082] In summary, the ocean multi-parameter profiler 100 of this solution has been greatly improved in modularity, ease of use and intelligent design compared to the existing technology.

[0083] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0084] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An ocean multi-parameter profile measuring 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, a Bluetooth wireless transmission module and an acquisition control circuit board. The acquisition control circuit board is arranged in the sealed cabin. The temperature sensor, the conductivity sensor, the pressure sensor and the pH sensor are respectively pluggable and installed with the sealed cabin through a watertight connector. 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 in the sealed cabin and is communicatively connected to the acquisition control circuit board. The GNSS positioning module has a GNSS positioning function and a pressure zero point marking function; the battery compartment is arranged in the sealed cabin. and is communicatively connected to the acquisition control circuit board, which adopts an adaptive power management mechanism to monitor and manage the power of the battery compartment; the sealed cabin body includes a sealing cylinder, a head end cover and a tail end cover, and the head end cover and the tail end cover are respectively sealed and installed at the axial ends of the sealing cylinder; the Bluetooth wireless transmission module is arranged in the sealed cabin body and is communicatively connected to the acquisition control circuit board; the switch assembly includes a switch and an LED circuit board, and the switch and LED circuit board are fixed to the inner end face of the tail end cover, and the tail end cover can be rotated 90 degrees to turn on the measuring instrument, and the power-on status, GNSS and Bluetooth status of the measuring instrument can be displayed through indicator lights; the GNSS positioning module, the Bluetooth wireless transmission module and all signal lights are disabled when the pressure setting value is deeper than the water surface. When the measuring instrument is close to the water surface or floats on the water surface, the GNSS positioning module, the Bluetooth wireless transmission module and all signal lights are normally enabled.

2. The ocean multi-parameter profiler according to claim 1, characterized in that: A circuit board bracket is provided in the sealing 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 installed in a pluggable manner with the corresponding cabin watertight connectors through the watertight connectors.

3. The ocean multi-parameter profiler according to claim 2, characterized in that: The pressure sensor is a silicon piezoresistive pressure sensor, and a pressure watertight connector is provided at the rear end of the silicon piezoresistive pressure sensor, and the silicon piezoresistive pressure sensor is pluggable and installed with the corresponding cabin watertight connector through the pressure watertight connector; the conductivity sensor is a seven-electrode conductivity sensor, and a conductivity watertight connector is provided at the rear end of the seven-electrode conductivity sensor, and the seven-electrode conductivity sensor is pluggable and installed with the corresponding cabin watertight connector through the conductivity watertight connector; the temperature sensor is a thermistor sensor, and a temperature watertight connector is provided at the rear end of the thermistor sensor, and the thermistor sensor is pluggable and installed with the corresponding cabin watertight connector through the temperature watertight connector; the pH sensor is a pH composite electrode sensor, and a pH watertight connector is provided at the rear end of the pH composite electrode sensor, and the pH composite electrode sensor is pluggable and installed with the corresponding cabin watertight connector through the pH watertight connector.

4. The ocean multi-parameter profiler according to claim 3, characterized in that: 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 locks.

5. The ocean multi-parameter profiler 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, and the rear ends of the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all equipped with the watertight connector lock, and the rear end of the watertight connector lock is threadedly connected to the mounting hole of the head end cover in which the cabin watertight connector is embedded, and the front end port of the watertight connector lock is provided with a snap ring, and the temperature watertight connector, the conductivity watertight connector, the pressure watertight connector and the pH watertight connector are all provided with a raised step adapted to the snap ring.

6. The ocean multi-parameter profiler according to any one of claims 1 to 5, 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 and control circuit board.

7. The ocean multi-parameter profiler according to claim 6, characterized in that: It also includes an external watertight connector, which is threadedly connected to the tail end cover and is communicatively connected to the acquisition control circuit board and the battery compartment; the external watertight connector can be connected to an external matching cable to charge the battery compartment or perform wired data transmission.

8. The ocean multi-parameter profiler according to claim 6, characterized in that: The switch assembly also includes a cabin pressure cover and a rotary switch. Four Hall switches and four LED indicator lights are evenly distributed along the circumference of the switch and LED circuit board, and the LED indicator lights and the Hall switches are staggered at intervals. The four LED indicator lights are a GNSS signal light, a Bluetooth signal light, a power signal light and a power-on status signal light; a sapphire window is embedded in the outer end face of the tail end cover to display the status of the LED indicator lights; the cabin pressure cover is fixed to the outer end face of the tail end cover to axially limit the sapphire window; the rotary switch is sleeved on the outside of the cabin pressure cover and rotatably cooperates with the cabin pressure cover. Four blind holes and four through holes are evenly distributed along the circumference of the rotary switch, and the blind holes and the through holes are staggered at intervals. Magnets are embedded in the four blind holes. Rotating the rotary switch can make the magnet approach or move away from the Hall switch to turn on or off the measuring instrument. The four through holes correspond one-to-one to the four LED indicator lights.

9. The ocean multi-parameter profiler according to any one of claims 1 to 5, characterized in that: It also includes a host computer used in conjunction with the ocean multi-parameter profile measuring instrument, and the host computer is configured with evaluation software. The evaluation software can intelligently evaluate the performance status of the temperature sensor, the conductivity sensor and the pressure sensor based on the field measurement data and calibration cycle of the temperature sensor, the conductivity sensor and the pressure sensor; the evaluation software can intelligently evaluate the performance status of the pH sensor based on the measurement and calibration data of the pH sensor.

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