Portable data comparator for ocean station

Abstract

The application discloses a portable data comparison measuring instrument for ocean station and belongs to the technical field of data comparison measuring instruments, which comprises a measuring host, an internal integrated data acquisition display module, a power supply battery and a communication connecting piece; a measuring sensor group for collecting environmental data; a data acquisition circuit board in the measuring host is provided with a main control module, a data acquisition module and a power supply control module, the data acquisition module filters sample data through a median filtering algorithm, the main control module adopts an average error and extreme error weighted comprehensive scoring method to determine the instrument state, the main control module determines the system deviation according to the comparison result, performs linear regression analysis, writes the sensitivity deviation coefficient and zero point drift into the instrument to be measured through the communication connecting piece, and realizes sensor calibration. Through integrated design and intelligent data processing algorithm, the application can automatically complete multi-parameter synchronous acquisition and storage, and realizes unmanned automatic comparison measurement of the observation data of the ocean station.

Description

Technical Field

[0001] This invention belongs to the field of data comparison instrument technology, and in particular relates to a portable data comparison instrument for marine stations. Background Technology

[0002] Ocean stations are observation sites established for the long-term, continuous acquisition of marine environmental data and are a core component of the marine observation network. To ensure the accuracy of ocean station observation data, ocean stations should regularly organize on-site data comparison tests, no less than once a month. When new automated observation instruments are installed or sensors are repaired or replaced, on-site comparison tests must be conducted for no less than 48 hours. Currently, the data comparison test mode at ocean stations mainly combines manual comparison and manual recording. Staff members need to bring calibrated standard instruments, recording forms, communication equipment, and safety protective equipment to the ocean station observation site to familiarize themselves with the online instrument operation status. Afterwards, they perform data comparison tests on each parameter and manually record the relevant data in forms. After the on-site comparison is completed, staff members organize the on-site observation records, instrument calibration certificates, data comparison reports, and other materials, manually filling in key information such as comparison time, location, participants, instrument model, and comparison results.

[0003] Defects and shortcomings of existing technology: Currently, data comparison at marine stations is mainly conducted through a combination of manual (sampling) comparison and manual recording. According to regulations, each marine station needs to conduct data comparison every month. The comparison data is often in the minute range, and staff need to manually record a large amount of data and analyze it. The on-site comparison records at grassroots stations are mostly made of paper forms, which are easily blurred due to sea winds and humidity, making subsequent data tracing and verification difficult. At the same time, there are cases where record items are missing (such as the sea condition and instrument number at the time of sampling are not marked), which affects the rigor of data comparison and analysis.

[0004] The data comparison work generally needs to be carried out continuously for 24 hours. The staff may be affected by extreme weather such as rain and high temperature, which may cause the on-site comparison to be interrupted. Some coastal stations are unable to complete the comparison task as planned every year due to weather reasons, resulting in time blind spots in data quality control.

[0005] Some comparative parameters require manual calibration readings (seawater thermometers, wet-bulb and dry-bulb thermometers, etc.). Technicians at remote coastal stations lack systematic training and have insufficient professional skills in instrument calibration and data error analysis, inevitably leading to reading errors when reading multiple times.

[0006] Unmanned marine stations are mostly located in remote areas, and their data comparison work takes up most of the energy of front-line staff. As the number of marine stations increases, the shortcomings of insufficient number and skills of grassroots staff are gradually exposed. Summary of the Invention

[0007] To address the above-mentioned technical deficiencies, this invention provides a portable data comparison instrument for marine stations. Through integrated design and intelligent data processing algorithms, it can automatically complete the synchronous acquisition and storage of multiple parameters, realizing unattended automated comparison of marine station observation data.

[0008] To achieve the above-mentioned technical objectives, the present invention is implemented through the following technical solution: A portable data comparison instrument for marine stations includes: A working support is used to provide a stable installation platform; The measuring host is detachably mounted on the working bracket and integrates a data acquisition and display module, a power supply battery, and communication connectors. The measurement sensor group, including meteorological measurement sensors and hydrological measurement sensors, is connected to the measurement host via a data cable and is used to collect environmental data; The measuring unit is detachably mounted on the working stand and integrates a data acquisition and display module, a power supply battery, and communication connectors. The measurement sensor group is connected to the measurement host via a data cable and is used to collect environmental data; The data acquisition circuit board inside the measurement host includes a main control module, a data acquisition module, and a power control module, wherein: The data acquisition module samples a set of data every 3 seconds. The data acquisition module filters 1 minute of sample data using a median filtering algorithm to obtain the median filtering result V. std ; The main control module uses a weighted comprehensive scoring method of average error and extreme error to determine the instrument status, with the average error being... :

[0009] i This refers to the group number of the comparison values. n This represents the total number of comparison value groups. V std_i This is the standard value. V test_i The value to be measured; Calculate the sensitivity deviation coefficient k, zero drift b, and linear correlation coefficient R. 2 To assess whether the response trend of the instrument under test to environmental changes is consistent with that of the standard instrument; The main control module compares ΔQ with the parameter value to obtain a graded comparison conclusion. If the linear correlation coefficient R... 2If the value is greater than 0.95 and ΔQ exceeds the parameter value, the main control module determines the system deviation based on the comparison test results, performs linear regression analysis, and writes the sensitivity deviation coefficient k and zero drift b into the instrument under test through the communication connector to achieve sensor calibration.

[0010] Preferably, the working support includes a support body and a worktable. The upper end of the support body is provided with a universal ball joint, and a screw is provided on the universal ball joint. The bottom surface of the worktable is provided with a screw hole, and the screw hole at the bottom of the worktable is tightened and fixed to the universal ball joint screw of the support body.

[0011] Preferably, the measuring host and the measuring sensor group are mounted on the workbench via a clamp structure.

[0012] Preferably, the measurement sensor group includes a meteorological measurement sensor and a hydrological measurement sensor, and the measurement host is equipped with at least three communication connectors, which are respectively used to connect the hydrological measurement sensor, the meteorological measurement sensor and the data acquisition device of the device to be compared, so as to realize multi-parameter synchronous comparison and data exchange.

[0013] Preferably, the communication connector includes an RS-232 serial interface for communicating with the device to be compared, enabling time synchronization and real-time data synchronization between the measurement host and the field automated data acquisition device.

[0014] Preferably, the data acquisition circuit board is equipped with a power control module, including a charging and discharging control unit and a voltage detection unit; when the voltage of the power supply battery is detected to be higher than 16V, the charging circuit is cut off, and when the voltage is lower than 10.8V, the discharging circuit is cut off to protect the battery safety.

[0015] Preferably, the front shell of the measuring host adopts a thin-walled structure, including a lower shell and an upper shell, which are fixedly connected by bolts, and the side wall is provided with a groove to cooperate with the clamp structure of the working bracket.

[0016] Preferably, the top and side walls of the upper shell are provided with openings, the communication connector is installed in the top opening by screwing, and the power switch and charging interface are installed in the side wall opening by screwing.

[0017] Preferably, the data acquisition and display module and the power supply battery are located inside the cavity of the face shell. The data acquisition and display module is located at the upper part of the cavity and is connected to the face shell by threaded connection. The power supply battery is located at the lower part of the face shell cavity and is connected to the face shell by solid glue.

[0018] Preferably, the data acquisition module is connected to the measurement sensor group via a communication connector and a data cable to acquire the output data of the measurement sensor group. The main control module processes the data and displays it on the display screen. The power control module controls the power supply battery to power the measurement host and the measurement sensor group. The main control module is equipped with a crystal oscillator circuit and a UART serial interface for time setting and RS-232 data communication with the automated acquisition equipment to realize real-time data exchange between the comparison instrument and the automated acquisition equipment, ensuring that the comparison value is synchronized with the automated acquisition.

[0019] The advantages and technical effects of this invention are: This invention, through an integrated measurement host and sensor array, achieves a transformation from manual reading to automatic data acquisition and storage. Once installed, the equipment can operate automatically without human intervention, completely resolving the issue of measurement interruptions caused by weather conditions and ensuring seamless data quality control.

[0020] This invention introduces a median filtering algorithm, which can effectively filter out noise introduced by complex electromagnetic environment or sensor fluctuations on site, and improve the signal-to-noise ratio of the comparison data; at the same time, it eliminates the time difference between manual recording and automated system by synchronizing with the field data acquisition device through RS-232 interface, ensuring the timeliness and rigor of the comparison data.

[0021] This invention is portable and easy to use, and can adapt to complex environments. The whole machine adopts a lightweight and integrated design, and is equipped with a waterproof and shockproof chassis and a low-power power management module (with a battery life of up to 15 hours). It is especially suitable for single-person fieldwork in islands, offshore areas and other scenarios where there is no mains power and inconvenient transportation.

[0022] This invention is compatible with common hydrological and meteorological sensor interfaces used in marine stations, replacing traditional single reading instruments and reducing the number of portable devices; it automatically generates electronic reports to avoid the defects of paper records being easily damaged and difficult to trace, and realizes digital closed-loop management of comparative measurement data. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a preferred embodiment of the present invention is shown; Figure 2 A schematic diagram of the measuring host structure in a preferred embodiment of the present invention is shown; Figure 3 A schematic diagram of the data acquisition circuit board in a preferred embodiment of the present invention is shown; Figure 4 A flowchart of a preferred embodiment of the present invention is shown.

[0025] The components include: 1. Measurement host; 2. Measurement sensor group; 3. Working bracket; 4. Data cable; 101. Communication connector; 102. Lower shell; 103. Upper shell; 104. Power switch; 105. Charging interface; 106. Groove; 107. Data acquisition and display module; 108. Power supply battery; 201. Data acquisition circuit board; 202. Display screen; 301. Bolt fastening structure for data acquisition and display module; 302. Bolt fastening structure for front shell; 401. Bracket body; 402. Workbench; 403. Caliper structure; 501. Main control module; 502. Data acquisition module; 503. Power control module. Detailed Implementation

[0026] To make the above-mentioned objectives, control system design, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] The portable data comparison instrument for marine stations is a mobile metering device specifically designed for data comparison at marine stations. Its core function is to automatically perform on-site comparison and verification of sensor data from the marine station's hydrological and meteorological observation system, replacing the manual comparison and recording mode at marine stations. This ensures the accuracy and reliability of marine hydrological and meteorological observation data and is a key tool for quality control of marine observation data.

[0028] The portable data comparison instrument of this invention features intelligence and low power consumption, and is compatible with multiple parameters, including common sensors used in marine stations such as water temperature / salinity, wind speed / direction, air temperature / humidity, air pressure, and visibility sensors, enabling simultaneous multi-parameter comparison. Equipped with a working stand, the instrument automatically collects and stores comparison data in real time, automatically generating error curves and comparison reports, enabling long-term data comparison. This avoids delays or interruptions caused by human error, or reading errors affecting the comparison work, thus completing the transformation from manual to automated comparison of marine station observation equipment.

[0029] The working steps of the portable data comparison instrument are as follows: Step 1: Device Handshake and Task Configuration The portable data comparison instrument establishes a communication connection with the marine instrument under test (usually a data acquisition device used in marine stations) via RS232 communication. It reads the device ID, sensor type and current operating parameters of the instrument under test, adjusts the measurement time of the portable data comparison instrument to match that of the instrument under test, and generates a comparison task configuration file, which includes information such as comparison time, location, device under test, and comparison parameters.

[0030] Step 2: Data Synchronization and Acquisition The portable data comparison instrument can collect a set of data every 3 seconds. Set the sampling frequency of the portable data comparison instrument to match that of the instrument under test, and perform synchronous sampling within the comparison time window. Obtain the original dataset Data = {(t i , V std_i , V test_i )}, where t i It is a time series. V std_i This is the standard value (measured by a comparison instrument). V test_i This is the value to be measured.

[0031] Step 3: Data Preprocessing and Outlier Removal The median filtering algorithm is used to remove outliers from the Data dataset and eliminate high-frequency noise interference.

[0032] Step 4: Comparison Algorithm Portable data comparators use a weighted comprehensive scoring method to determine instrument status, considering not only average error but also extreme errors. The mean of the error sequence is calculated. :

[0033] in, i This refers to the group number of the comparison values. n This represents the total number of comparison value groups. V std_i This is the standard value. V test_i The value to be measured; Calculate the linear correlation coefficient R 2 The purpose is to assess whether the response trend of the instrument under test to environmental changes is consistent with that of the standard instrument.

[0034] Step 5: Result Determination and Report Generation The calculation results are compared with the preset marine observation specifications, Part 2: Coastal Observation, or user-defined thresholds. A comparison report is automatically generated, and a comparison conclusion of "qualified," "needs calibration," or "faulty" is given.

[0035] Step 6: Intelligent Drift Calibration Algorithm If the comparison results show a fixed systematic bias (i.e., the linear correlation coefficient R), 2 If the error is greater than 0.95 but the average error exceeds the threshold, then linear regression analysis is performed to automatically calculate the correction sensitivity deviation coefficient k and zero drift b. The portable comparator writes the correction coefficients into the instrument under test through the communication interface to achieve sensor calibration.

[0036] Please see Figures 1 to 3 A portable data comparator for marine stations, comprising: Working bracket 3 is used to provide a stable installation platform; The measuring host 1 is detachably mounted on the working bracket 3 and integrates a data acquisition and display module 107, a power supply battery 108, and a communication connector 101. The measurement sensor group 2, including meteorological measurement sensors and hydrological measurement sensors, is connected to the measurement host 1 via data cable 4 and is used to collect environmental data. The data acquisition circuit board 201 inside the measurement host 1 includes a main control module 501, a data acquisition module 502, and a power control module 503. The data acquisition module 502 samples a set of data every 3 seconds, and samples a total of 20 data samples within 1 minute. X 1 ，X 2 ...X i ...X 19 ，X 20 The data acquisition module 502 is equipped with a median filtering algorithm to filter the sample data to eliminate noise interference. The median filtering result serves as minute-level data for the comparison instrument. The mathematical expression of the median filtering algorithm is: V std =Med( X 1 ，X 2 …X i …X 19 ，X 20 ) in, V std This is the result of median filtering. X i For the first time in every minute i The data is 20 sets of data in 1 minute, and Med() is the median mean function. It is to arrange the 20 sets of sample data in 1 minute from smallest to largest and calculate the mean of the sum of the 10th and 11th sets of data. The main control module 501 uses a weighted comprehensive scoring method of average error and extreme error to determine the instrument status. The average error... :

[0037] in, i This refers to the group number of the comparison values. n This represents the total number of comparison value groups. V std_i This is the standard value. V test_i The value to be measured; Calculate the sensitivity deviation coefficient k, zero drift b, and linear correlation coefficient R. 2 The purpose is to assess whether the response trend of the instrument under test to environmental changes is consistent with that of the standard instrument.

[0038] The formula for calculating the sensitivity deviation coefficient k is:

[0039] The formula for calculating zero drift b is:

[0040] Correlation coefficient R 2 The calculation formula is:

[0041]

[0042] in V std_i This is the standard value (measured by a comparison instrument). V test_i The value to be measured. The sample mean of the standard value. The sample mean of the measured value. For the first i Group predicted values.

[0043] The main control module compares ΔQ with the parameter value, which is a threshold set by the user or the second part of the marine observation specification: coastal observation, to obtain a graded comparison conclusion. The graded comparison conclusion includes "qualified", "needs calibration", or "faulty". If the linear correlation coefficient R 2 If the value is greater than 0.95 and ΔQ exceeds the parameter value, the main control module determines the system deviation based on the comparison test results, performs linear regression analysis, and writes the sensitivity deviation coefficient k and zero drift b into the instrument under test through the communication connector to achieve sensor calibration.

[0044] The main control module 501 determines the system deviation (linear correlation coefficient R) based on the comparison results. 2>0.95 (mean error exceeds threshold), perform linear regression analysis, and write the sensitivity deviation coefficient k and zero drift b into the instrument under test through communication connector 101 to achieve sensor calibration.

[0045] The working support 3 includes a support body 401 and a worktable 402. The upper end of the support body 401 is provided with a universal ball, and the universal ball surface is provided with a screw. The bottom surface of the worktable 402 is provided with a screw hole. The screw hole at the bottom of the worktable 402 is tightened and fixed to the universal ball screw of the support body 401. Loosening the locking universal ball knob allows for free rotation, pitching and tilting in any direction. After adjusting to the correct position, tightening it again will fix the position.

[0046] The measuring host 1 includes a faceplate, a data acquisition and display module 107, a power supply battery 108, a power switch 104, a charging interface 105, a power adapter, a communication connector 101, and a data storage card. The measuring sensor group 2 includes a meteorological measuring sensor and a hydrological measuring sensor. The working support 3 includes a support body 401 and a worktable 402.

[0047] In use, the working bracket 3 is placed at the data comparison site of the marine station. The measurement sensor group 2 and the measurement host 1 are installed and fixed on the workbench 402 of the working bracket 3 through a clamp structure. The measurement sensor group 2 is connected to the communication connector 101 of the measurement host 1 through the data cable 4 and performs data communication. The measurement host 1 collects and stores the environmental data measured by the sensors.

[0048] The housing consists of an upper housing 103 and a lower housing 104. The upper housing 103 and the lower housing 104 are thin-walled structures and are fixedly connected by six housing bolt fastening structures 302 to form a housing cavity. The top and side walls of the upper housing 103 have openings. The measuring host 1 has three communication connectors 101, which are installed in the top openings by the housing bolt fastening structures 302. The power switch 104 and the charging interface 105 are installed in the side wall openings. The side walls also have two grooves 106.

[0049] The data acquisition and display module 107 and the power supply battery 108 are located inside the cavity of the front shell. The data acquisition and display module 107 is located at the upper part of the cavity of the front shell and is connected to the front shell through the data acquisition and display module bolt fastening structure 301. The power supply battery 108 is located at the lower part of the cavity of the front shell and is connected to the front shell through solid glue.

[0050] The data acquisition and display module 107 includes a display screen 202 and a data acquisition circuit board 201. The display screen 202 is located between the upper shell and the data acquisition circuit board 201. The display screen 202 is connected to the data acquisition circuit board 201 through an integrated circuit bus and is used to display the measurement data acquired by the data acquisition circuit board. The data acquisition circuit board is located directly below the display screen.

[0051] The data acquisition circuit board 201 includes a main control module 501, a data acquisition module 502, and a power control module 503. The data acquisition module 502 is connected to the measurement sensor group through a communication connector to acquire the output data of the sensors. The main control module 501 is used to process the data and display it on the display screen. The power control module 503 controls the power supply battery to power the entire portable data comparison instrument of the marine station.

[0052] The data acquisition circuit board 201 is equipped with a clock circuit and a UART serial interface, which allows for time setting and RS232 data communication with the device under test. This enables real-time data exchange between the comparator and the device under test, ensuring that the measured values ​​are synchronized with the on-site automated data acquisition. The device under test is the on-site data acquisition unit.

[0053] The data acquisition circuit board 201 samples a set of data every 3 seconds, and a total of 20 samples are collected within 1 minute. {X 1 ， X 2 ...X i ...X 19 ，X 20 } The data acquisition module is equipped with a median filtering algorithm to filter the sample data to eliminate noise interference. The median filtering result serves as minute-level data for the comparison instrument.

[0054] The data acquisition circuit board includes a power control module, comprising a charge / discharge control unit and a voltage detection unit. When the measurement host is charging, the power adapter connects to AC power and supplies power to the power module through an external charging interface. The voltage detection unit monitors the battery voltage in real time. When the battery voltage exceeds 16V, the charge / discharge control unit cuts off the charging circuit. When the measurement host is operating, the voltage detection unit monitors the battery voltage in real time. When the battery voltage drops below 10.8V, the charge / discharge control unit cuts off the battery discharge circuit.

[0055] The worktable of the work stand is equipped with a tightening caliper. By turning the fastening screws on both sides of the tightening caliper to adjust the caliper, the measuring host and the comparison sensor can be fixed to the work stand.

[0056] The working stand 3 is equipped with three support legs and is placed vertically on the ground. The measuring host 1 and the measuring sensor group 2 are mounted on the workbench 402 through the clamp structure 403. The two ends of the data cable 4 are connected to the measuring host 1 and the measuring sensor group 2 respectively. The measuring host 1 collects and stores the environmental data measured by the sensors.

[0057] Meteorological measurement sensors can collect and measure parameters such as wind, temperature, humidity, and air pressure, while hydrological measurement sensors can collect and measure sea surface temperature and salinity parameters. The data cable is matched with the interface of the measurement sensor and is no less than 10 meters in length.

[0058] Please see Figure 4 The measurement process includes: Assembly: Carry the portable data comparison instrument for marine stations to the data comparison work site, place it properly on the ground and ensure the stability of the working stand 3, tighten the clamp structure 403 to install the measurement host 1 and the measurement sensor group 2 on the workbench 402, connect one end of the data cable 4 to the communication connector 101 of the measurement host 1, and the other end to the communication interface of the measurement sensor group 2. The three communication connectors 101 on the measurement host 1 can be used to connect and communicate with the hydrological measurement sensor, the meteorological measurement sensor and the device to be compared, respectively, to realize simultaneous comparison of multiple parameters.

[0059] Parameter settings: Press the power switch 104 to ensure that the measuring host 1 is powered on normally. Click the display screen 202 to set the parameters of the measuring host 1. Adjust the time of the measuring host 1 to be consistent with the time of the device to be compared on site. Select and configure the serial communication, verification and other parameters of the host according to the model of the measuring sensor used on site to ensure that the measuring host 1 matches the model of the measuring sensor.

[0060] Data acquisition and processing: After the parameters are set, the measurement host 1 will automatically acquire the measurement data of the measurement sensor group and the data acquired by the device to be compared and process them according to the built-in algorithm. The display screen 202 can display the corresponding data comparison results, and the data storage card synchronously stores the corresponding data.

[0061] Equipment calibration: Based on the comparison test results, you can choose whether to calibrate the sensor and save the calibration parameters.

[0062] End: When the required comparison time has been reached, first press the power switch 104 to ensure that the measuring host 1 is turned off. Remove the measuring host 1 and the measuring sensor group 2 from the workbench 402. Loosen both ends of the data cable 4 to separate it from the measuring host 1 and the measuring sensor group 2. Put away the work stand and store the entire set of equipment of the marine station portable data comparison instrument in the chassis to complete this comparison task.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable data comparison instrument for marine stations, characterized in that, include: The measuring unit is detachably mounted on the working stand and integrates a data acquisition and display module, a power supply battery, and communication connectors. The measurement sensor group is connected to the measurement host via a data cable and is used to collect environmental data. The measurement sensor group includes meteorological measurement sensors and hydrological measurement sensors. The measurement host is equipped with at least three communication connectors, which are respectively used to connect the hydrological measurement sensors, meteorological measurement sensors and the data acquisition device of the device to be compared, so as to realize multi-parameter synchronous comparison and data exchange. The data acquisition circuit board inside the measurement host includes a main control module, a data acquisition module, and a power control module, wherein: The data acquisition module samples a set of data every 3 seconds. The data acquisition module filters one minute of sample data using a median filtering algorithm to obtain the median filtering result. V std ; The main control module uses a weighted comprehensive scoring method of average error and extreme error to determine the status of the instrument under test. The average error is... : i This refers to the group number of the comparison values. n This represents the total number of comparison value groups. V std_i This is the standard value. V test_i The value to be measured; Calculate the sensitivity deviation coefficient k, zero drift b, and linear correlation coefficient R. 2 To assess whether the response trend of the instrument under test to environmental changes is consistent with that of the standard instrument; The main control module will By comparing with the parameter values, a hierarchical comparison conclusion is obtained. If the linear correlation coefficient R... 2 >0.95, and If the parameter value is exceeded, the main control module determines the system deviation based on the comparison test results, performs linear regression analysis, and writes the sensitivity deviation coefficient k and zero drift b into the instrument under test through the communication connector to achieve sensor calibration.

2. The portable data comparison instrument for marine stations according to claim 1, characterized in that, The working support includes a support body and a worktable. The upper end of the support body is provided with a universal ball joint, and a screw is provided on the universal ball joint. The bottom surface of the worktable is provided with a screw hole, and the screw hole at the bottom of the worktable is tightened and fixed to the universal ball joint screw of the support body.

3. The portable data comparison instrument for marine stations according to claim 2, characterized in that, The measurement host and the measurement sensor group are mounted on the workbench via a clamp structure.

4. The portable data comparison instrument for marine stations according to claim 1, characterized in that, The communication connector has an internal RS-232 serial interface for communicating with the device under test, enabling time synchronization and real-time data synchronization between the measurement host and the field automated data acquisition equipment.

5. The portable data comparison instrument for marine stations according to claim 1, characterized in that, The data acquisition circuit board is equipped with a power control module, including a charging and discharging control unit and a voltage detection unit; when the detected battery voltage is higher than 16V, the charging circuit is cut off, and when the voltage is lower than 10.8V, the discharging circuit is cut off to protect the battery safety.

6. The portable data comparison instrument for marine stations according to claim 1, characterized in that, The main measuring unit has a thin-walled structure, including a lower shell and an upper shell, which are fixedly connected by bolts. The side wall has grooves that cooperate with the clamp structure of the working bracket.

7. The portable data comparison instrument for marine stations according to claim 6, characterized in that: The top and side walls of the upper shell are provided with openings. The communication connector is installed in the top opening by screwing on, and the power switch and charging interface are installed in the side wall opening by screwing on.

8. The portable data comparison instrument for marine stations according to claim 1, characterized in that, The data acquisition and display module and the power supply battery are located inside the cavity of the front shell. The data acquisition and display module is located at the upper part of the cavity and is connected to the front shell by screwing the data acquisition and display module. The power supply battery is located at the lower part of the front shell cavity and is connected to the front shell by solid glue.

9. The portable data comparison instrument for marine stations according to claim 1, characterized in that: The data acquisition module is connected to the measurement sensor group via a communication connector and data cable, and acquires the output data of the measurement sensor group. The main control module processes the data and displays it on the display screen. The power control module controls the power supply battery to power the measurement host and the measurement sensor group. The main control module is equipped with a crystal oscillator circuit and a UART serial interface for time setting and RS-232 data communication with the automated acquisition equipment to realize real-time data exchange between the comparison instrument and the automated acquisition equipment, ensuring that the comparison value is synchronized with the automated acquisition.

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