CN115420908A

CN115420908A - Wind direction calibrating device and method for ocean anemometer

Info

Publication number: CN115420908A
Application number: CN202211065303.2A
Authority: CN
Inventors: 孙嫣; 刘昕; 胡典龙; 姚精华; 王杰; 杨茂水; 任燕
Original assignee: Kunshan Zhongsi Automation Technology Co ltd
Current assignee: Kunshan Zhongsi Automation Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-12-02

Abstract

The invention discloses a wind direction calibrating device and a wind direction calibrating method for an ocean wind meter, belonging to the technical field of wind direction calibration of ocean wind meters, wherein the device comprises a base, wherein the center of the base is provided with a rotating circular table, and the upper end of the rotating circular table is connected with a mounting seat; a motor II and an angle encoder II are arranged in the base, the motor II is connected with the rotary circular table in a driving mode, and the angle encoder II is connected with the rotary circular table; the upper surface of the base is provided with a rotary ring table around the mounting seat, an electric telescopic rod is vertically arranged on the rotary ring table, and the top end of the electric telescopic rod is connected with a gripper; a motor I and an angle encoder I are arranged in the base, the motor I is in driving connection with a rotary ring table, and the rotary ring table is connected with the angle encoder I; the wind-direction monitoring device is characterized by further comprising a controller for controlling the wind-tunnel frequency converter and collecting wind-direction output of the ocean wind meter, wherein the controller is connected with the motor I, the angle encoder I, the gripper, the motor II and the angle encoder II. The wind direction detection device is simple and reasonable in structure, can conveniently and accurately detect the wind direction of the ocean wind meter, and improves the wind direction detection efficiency.

Description

Wind direction calibrating device and method for ocean anemometer

Technical Field

The invention belongs to the technical field of wind direction verification of ocean anemometers, and particularly relates to a wind direction verification device and a verification method of an ocean anemometer.

Background

Propeller type marine anemometer: an instrument for measuring wind direction and wind speed; referring to fig. 1, the structure of the wind direction measuring cup comprises a cup body 61 (a shell or a base), a wind vane 63 is connected to the top of the cup body 61 through a rotating shaft 62, a wind direction measuring component is arranged inside the cup body 61, and when the wind vane 63 and the cup body 61 rotate relatively, the wind direction measuring component can acquire a rotation angle value and convert the rotation angle value into a wind direction value to be output.

The method comprises the following steps that wind direction verification is required to be carried out on the propeller type ocean anemometer, the wind direction verification comprises two items, one is detection aiming at a wind direction indication value, namely wind direction accuracy is detected, a measurement index is an angle value, and a rule is required to be less than or equal to +/-5 degrees; and secondly, the flexibility of the wind direction rotating shaft 62 is verified, namely wind direction starting wind speed verification is carried out, the measurement index is a wind speed value, and the regulation rule is less than or equal to 0.5 m/s.

And (3) calibrating a wind direction indicating value:

at present, the measuring mechanisms in the domestic meteorological industry are all standard scales for wind direction verification of ocean anemometers, and the measuring scales used as standard measuring instruments have the following problems:

(1) The dial can not directly output a measurement result, if the dial is placed in a wind tunnel for use, manual reading is not feasible, machine vision can only be adopted, the wind direction sensor measures the diameter of a working section to be 1.3 meters, the dial is arranged at the bottom of the wind tunnel, the camera is arranged at the top, the shooting precision is not enough, if the dial is arranged by a bracket, on one hand, a flow field is influenced, on the other hand, the shooting quality is influenced, and the use cost is increased; and the use of machine vision introduces an additional source of uncertainty.

(2) The maximum allowable error of the accuracy index of the dial is +/-0.5 degrees, and the minimum three-equal-circle standard measuring instrument index in JJG 2057-2006 'plane angle measuring instrument verification system table' requires the maximum allowable error: and +/-0.5', the accuracy of the dial is far lower than the index, the dial does not meet the measurement and transmission requirement of a calibration system table, and the dial cannot be used as a standard measuring instrument for building the calibration of the wind direction sensor.

(3) The tracing of the present dial has no current effective national verification regulation or calibration standard, and can not be directly used as a standard instrument for building the standard.

The three problems are the root cause that the wind direction can not establish the measuring standard so far, the measuring standard can not be established, and the wind direction measuring data can not be traced to the national standard. The method is a technical problem existing in the existing wind direction indication value verification process.

And (3) starting and detecting wind speed aiming at wind direction:

when the wind direction starting wind speed detection of the propeller type ocean wind meter is carried out, a wind vane of the propeller type ocean wind meter installed in a wind tunnel needs to be deflected in advance, then the output frequency of a frequency converter is controlled to enable slowly increasing airflow to be generated in the wind tunnel, whether the wind vane rotates and is consistent with the airflow direction is judged, and the airflow speed when the direction is consistent is collected, recorded and stored. At present, the deflection of the wind vane and the control of the frequency converter in the steps need manual operation, the rotation condition of the wind vane can be observed only visually due to the fact that the propeller type ocean anemometer for inspection does not have a display device, and the manual operation and the matching are inconvenient and the inspection operation is inconvenient and the inspection work efficiency is affected due to the fact that the control device and the wind tunnel are respectively arranged in the control room and the working room.

In order to solve the technical problems involved in wind direction indication value and wind direction starting wind speed verification, deep research and analysis are carried out on the aspects of equipment principle structure, measurement performance indexes and the like, and a wind direction verification device and a verification method of an ocean anemometer are provided.

Disclosure of Invention

In order to overcome the technical problems, the invention provides a wind direction calibrating device and a wind direction calibrating method for a propeller type ocean wind meter, which are used for calibrating a wind direction indication value and a wind direction starting wind speed of the propeller type ocean wind meter, can reduce test errors, improve the accuracy of a calibrating result, enable the test to be more convenient and fast, reduce the calibrating operation difficulty and improve the calibrating efficiency.

The invention adopts the following technical scheme:

a wind direction calibrating device of an ocean anemometer comprises a base horizontally arranged at the inner bottom of a wind tunnel, wherein a rotating circular truncated cone is rotatably arranged in the center of the base, the rotating axis of the rotating circular truncated cone is vertical, the upper end of the rotating circular truncated cone is positioned outside the base and coaxially connected with an installation seat, and the lower end of the rotating circular truncated cone is positioned in the base; a motor II and an angle encoder II are fixedly arranged in the base, the motor II is in driving connection with the rotary circular table, and the angle encoder II is connected with the rotary circular table;

the upper surface of the base is horizontally and rotatably provided with a rotary ring table around the mounting seat, the rotary center of the rotary ring table is the circle center of the rotary ring table, the circle center of the rotary ring table is located on the central axis of the mounting seat, the rotary ring table is arranged in an embedded mode, the bottom end of the rotary ring table is located in the base, the upper surface of the rotary ring table is flush with the upper surface of the base, an electric telescopic rod is vertically arranged on the rotary ring table, and the top end of the electric telescopic rod is connected with a gripper; a motor I and an angle encoder I are arranged in the base, the motor I is in driving connection with a rotary ring table, and the rotary ring table is connected with the angle encoder I;

the device is characterized by further comprising a controller for controlling the wind tunnel frequency converter and acquiring wind direction output data of the propeller type ocean anemometer to be detected, wherein the controller is in control connection with the motor I, the angle encoder I, the hand grip, the motor II and the angle encoder II.

Preferably, the base is internally and horizontally fixed with a fixing plate, and the motor I, the angle encoder I, the motor II and the angle encoder II are all arranged on the fixing plate.

Preferably, a central platform is arranged between the rotary ring platform and the rotary round platform, the central platform is fixedly connected with the fixed plate, the central platform is rotatably connected with the rotary ring platform, the central platform is rotatably connected with the rotary round platform, and the upper surface of the central platform is flush with the upper surface of the rotary ring platform.

Preferably, the inner ring of the rotary ring table is provided with an alignment mark in a matching way with the outer ring of the central platform, and the outer ring of the rotary ring table is also provided with an alignment mark in a matching way with the base.

Preferably, a gear ring is fixedly sleeved on the part, located in the base, of the rotating circular truncated cone, the motor II is connected with a gear, the gear is meshed with the gear ring, a driven belt wheel is fixedly sleeved on the part, located in the base, of the rotating circular truncated cone, the motor I is connected with a driving belt wheel, and the driving belt wheel is connected with the driven belt wheel through a belt.

Preferably, the radius of the gear is smaller than that of the gear ring, and the radius of the driving pulley is smaller than that of the driven pulley.

Preferably, the gripper adopts flexible servo clamping jaw, and motor I, motor II adopt high accuracy planetary reducer.

Preferably, the rotating shaft of the angle encoder II is coaxially and rigidly connected with the rotating circular truncated cone. .

A wind direction verification method for an ocean anemometer comprises the following steps:

s1: wind direction starting wind speed verification

S11: horizontally mounting a base at the bottom in the wind tunnel in advance, and mounting a propeller type ocean anemometer to be detected on a mounting seat;

when the propeller marine anemoscope is installed, the electric telescopic rod is determined to be positioned on the leeward side of the installation base through the alignment mark and the output value of the angle encoder I, the angle of the wind vane is positioned, the wind vane is made to be along the axis of wind tunnel airflow, and the wind direction output of the marine anemoscope at the moment is set to be 0 degree by the controller;

s12: the controller controls the electric telescopic rod to ascend, controls the gripper to clamp the wind vane, controls the motor I to drive the rotating ring table to rotate through the belt, drives the electric telescopic rod to drive the gripper to drive the wind vane to deflect, keeps the mounting seat motionless when the wind vane deflects, and further ensures that the cup body is motionless, so that the wind vane and the cup body rotate relatively; the controller enables the wind vane to rotate to an acute angle position deviating from the axis of the airflow by 10 degrees according to the output value of the angle encoder I, and controls the gripper (loosening the wind vane and controlling the electric telescopic rod to drive the gripper to descend so as to enable the wind vane to be in a free state after the wind vane is in place;

s13: starting the wind tunnel, controlling a wind tunnel frequency converter by a controller to enable the wind tunnel to generate slowly increasing airflow, simultaneously acquiring wind speed of the wind tunnel and wind direction output of a propeller type ocean anemometer by the controller in the process of gradually increasing the airflow, and recording the current airflow speed as A when the wind direction output of the ocean anemometer is restored to 0 degree, wherein the unit of A is meter/second; comparing the requirements of the specification technical indexes to judge whether the wind direction starting wind speed of the ocean anemometer is qualified or not, and completing automatic verification of the wind direction starting wind speed;

the specific judging method comprises the following steps: if the value of A is less than or equal to 0.5 m/s, the verified propeller type ocean anemometer is judged to be qualified; if the value of A is more than 0.5 m/s, determining that the verified propeller type ocean anemometer is unqualified;

s2: performing wind direction indication value verification

S21: horizontally mounting a base at the bottom in the wind tunnel in advance, and mounting a propeller type ocean anemometer to be detected on a mounting seat; electrically connecting a controller with a wind direction measuring assembly in the propeller type ocean anemometer to obtain a wind direction output value of the propeller type ocean anemometer;

s22: starting the wind tunnel, and enabling the controller to generate 5 m/s stable airflow in the wind tunnel, so that the position of a tail wing of a wind vane of the propeller type ocean anemometer is fixed on an airflow axis and is kept unchanged; the controller controls a motor II to start, the motor II drives a gear to rotate, the gear rotates to drive a meshed gear ring to rotate, the gear ring rotates to drive a rotary circular table to rotate, and further drives a mounting seat to rotate, so that a cup body of the propeller type ocean anemometer is driven to rotate, because a wind vane cannot rotate under the action of stable airflow, the cup body and the wind vane rotate relatively through a rotating shaft at the moment, when the wind vane rotates to the propeller type ocean anemometer, the wind direction output is 0 degree, and the output value of an angle encoder II is set to be 0 degree at the moment;

s23: the controller controls the motor II to continue rotating, the motor II drives the rotating circular truncated cone and the mounting seat to rotate, then the motor II drives the wind cup of the propeller type ocean wind meter to rotate to a certain detection point and then stop rotating, the detection point accurately positions the angle position of the detection point through an angle encoder II coaxially connected with the rotating circular truncated cone, and the angle encoder II outputs a standard angle value of the detection point, and the standard angle value is collected by the controller and marked as a standard angle value;

s24: because stable airflow of 5 m/s is generated in the wind tunnel, the position of the tail wing of the wind vane of the propeller type ocean anemometer is fixed on the axis of the airflow and is kept unchanged; when the cup body of the propeller type ocean anemometer rotates, the cup body and the wind vane move relatively, which is equivalent to wind direction change, at the moment, the controller directly collects the wind direction output value of the propeller type ocean anemometer at the detection point, the wind direction output value is recorded as a detection wind direction indicating value, the detection wind direction indicating value is compared with the standard angle value correspondingly output by the angle encoder II in the S23, whether the ocean anemometer is qualified or not is judged according to the requirement of the specification technical index, and the automatic detection of the indication value of the ocean anemometer is completed;

the specific method for judging whether the propeller type ocean anemometer is qualified or not comprises the following steps: since the measurement accuracy of the propeller type marine anemometer is ± 5 °, the measurement accuracy of the angle encoder II is ± 0.5 ", wherein 1 ° = 3600", both are rotated by the same angle, the obtained measurement values are different; subtracting the standard angle value from the detected wind direction indicating value to obtain an error value, comparing the error value with a maximum allowable error +/-5 degrees specified by the specification technical index requirement, and if the obtained error value is within the maximum allowable error range, judging that the detected ocean anemometer is qualified; otherwise, the product is judged to be unqualified. .

Compared with the prior art, the invention has the beneficial effects that:

1. the wind direction indicating value detection device is provided with the rotating circular table, the motor II, the angle encoder II, the mounting seat and the controller, when the wind direction indicating value detection is carried out, the wind speed in the wind tunnel is kept constant, the controller drives the cup body of the propeller type ocean wind meter to rotate to a detection point through controlling the motor II, the controller compares the wind direction value output by the propeller type ocean wind meter with the standard angle value output by the angle encoder II, whether the ocean wind meter is qualified or not can be judged according to the specification technical index requirement, the motor II can automatically rotate the cup body to the detection point and accurately output the standard angle value by matching with the angle encoder II, the standard angle is not read by human eyes or machine vision, the test error is reduced, the indicating value detection result is more accurate, and the operation is more convenient;

2. the invention takes an angle encoder II as a standard reference of the indicating value verification standard measurement of the ocean wind meter, the angle encoder has the current effective national JJF1115-2004 'photoelectric axis angle encoder calibration standard' which can realize the value tracing, meets the requirement of the standard-building measuring standard instrument, can meet the measuring performance requirement of the national verification regulation JJJJG 1167-2019 'ocean wind meter' on the wind direction measuring standard instrument, and the measuring performance can meet the accuracy indexes of the three-equal-circle division standard measuring instrument in the national verification system table JJJJG 2057-2006 'plane angle measuring instrument verification system table', namely the maximum allowable error: plus or minus 0.5', the error is 1/3600 of the scale, and the accuracy is greatly improved.

3. The device is provided with a mounting seat, a rotary ring platform, an electric telescopic rod, a gripper, a motor I, an angle encoder I and a controller, when starting wind speed detection is carried out, a propeller type ocean wind meter is mounted on the mounting seat in advance and is adjusted to zero, then the controller drives a wind vane to rotate by controlling the operation of the motor I, the electric telescopic rod and the gripper, the rotary ring platform rotates by 10 degrees according to an output value of the angle encoder I, the wind vane rotates to an acute angle position which is 10 degrees away from an axis of wind tunnel airflow, then the controller controls a wind tunnel frequency converter to generate gradually increasing airflow and collects wind speed and wind direction output of the propeller type ocean wind meter to be detected, when the wind direction output of the propeller type ocean wind meter returns to zero, the wind speed is recorded, whether the wind direction starting wind speed of the propeller type ocean wind meter is qualified or not can be judged by comparing with specification technical index requirements, the starting wind speed detection is automatically carried out, the operation difficulty of the starting wind speed detection is reduced, and the detection efficiency is improved;

4. according to the invention, the motors I and II adopt high-precision planetary speed reducers, the speed of the motors I and II is reduced again in transmission, the accuracy of the rotating angles of the rotary circular table and the rotary circular table is improved, the accuracy of the verification result is improved, the flexible servo clamping jaws are adopted by the gripper, the wind vane of the propeller type ocean wind meter is accurately and stably clamped, the rotating error is reduced, and the wind vane is prevented from being damaged.

Drawings

FIG. 1 is a general schematic of the present invention;

FIG. 2 is a schematic view of the present invention (base removed);

figure 3 is a side view of the structure of the present invention (with the base removed).

Description of reference numerals:

1, a base; 2, aligning a mark; 3 rotating the ring table; 4, rotating the circular truncated cone; 5, mounting a base; 6, marine anemometry; 61, a cup body; 62 a rotating shaft; 63 a wind vane; a 64 propeller; 7, an electric telescopic rod; 8, gripping by a hand; 9 an angle encoder I;10 a motor I;11 a central platform; 12 an angle encoder II;13, a motor II;14 fixing the plate; 15 a driving pulley; 16 a passive pulley; 17 gears; 18 ring gear.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A wind direction calibrating device of an ocean anemometer comprises a base 1 horizontally arranged at the inner bottom of a wind tunnel, wherein a rotary circular table 4 is rotatably arranged at the center of the base 1, the rotating axis of the rotary circular table 4 is vertical, the upper end of the rotary circular table 4 is positioned outside the base 1 and is coaxially connected with a mounting seat 5, and the lower end of the rotary circular table 4 is positioned in the base 1; a motor II13 and an angle encoder II12 are fixedly arranged in the base 1, the motor II13 is connected with the rotary circular table 4 in a driving mode, and the angle encoder II12 is connected with the rotary circular table 4; the upper surface of the base 1 is horizontally and rotatably provided with a rotary ring table 3 around an installation seat 5, the rotating center of the rotary ring table 3 is the circle center of the rotary ring table, the circle center of the rotary ring table is located on the central axis of the installation seat 5, the rotary ring table 3 is arranged in an embedded mode, the bottom end of the rotary ring table 3 is located in the base 1, the upper surface of the rotary ring table 3 is flush with the upper surface of the base 1, the smoothness of the surface is guaranteed, unnecessary influence on airflow is prevented, an electric telescopic rod 7 is vertically arranged on the rotary ring table 3, and the top end of the electric telescopic rod 7 is connected with a gripper 8; a motor I10 and an angle encoder I9 are arranged in the base 1, the motor I10 is in driving connection with the rotary ring platform 3, the rotary ring platform 3 is connected with the angle encoder I9, specifically, the periphery of the part of the rotary ring platform 3, which is positioned in the base 1, is abutted against a rotating shaft wheel of the angle encoder I9, and when the rotary ring platform 3 rotates, the rotating shaft of the angle encoder I9 is driven to rotate through friction; the device also comprises a control wind tunnel frequency converter and a controller for collecting wind direction output data of the ocean wind meter 6 to be detected, wherein the controller is connected with a motor I10, an angle encoder I9, a gripper 8, a motor II13 and an angle encoder II12, the controller collects voltage data by connecting an output line of the ocean wind meter 6 to be detected so as to obtain wind direction output of the ocean wind meter 6, and the controller is arranged in a computer of a control room; when the indication value verification test of the ocean anemometer 6 is carried out, the wind speed in the wind tunnel is kept constant, the controller drives the cup body of the ocean anemometer 6 to rotate to a verification point through the motor II13, simultaneously, the angle value output by the ocean anemometer 6 is collected, the angle value is compared with the standard angle value collected from the angle encoder II12 in parallel, and whether the indication value of the ocean anemometer 6 is qualified or not can be judged by combining with the specification technical index requirements, the standard angle value serving as a reference is output by the angle encoder II12, the precision is higher, human eyes or machine vision reading is not needed, the test error is reduced, the verification result is more accurate, the verification operation is more convenient, and the verification efficiency is improved; when the starting wind speed of the propeller type ocean anemometer 6 is detected, the motor I10, the angle encoder I9, the electric telescopic rod 7 and the gripper 8 are matched to drive the wind vane of the propeller type ocean anemometer 6 to deflect in advance, then the controller controls the wind tunnel frequency converter to generate gradually increasing airflow and collect wind speed and wind direction output of the propeller type ocean anemometer 6, when the wind direction output of the propeller type ocean anemometer 6 returns to zero, the wind speed is recorded, whether the starting wind speed of the ocean anemometer 6 is qualified or not can be judged according to the technical index requirements of rules, the starting wind speed detection is automatically performed, manual deflection of the wind vane by a person and control of the frequency converter and visual rotation of the wind vane are not needed, the operation difficulty of wind direction starting wind speed detection of the ocean anemometer 6 is reduced, and the detection efficiency is improved.

In order to stably install all parts, a fixing plate 14 is horizontally and fixedly arranged in the base 1, and the motor I10, the angle encoder I9, the motor II13 and the angle encoder II12 are all arranged on the fixing plate 14; set up central platform 11 between rotatory platform 3 and the rotatory round platform 4, central platform 11 and fixed plate 14 fixed connection, rotate between central platform 11 and the rotatory round platform 3 and be connected, rotate between central platform 11 and the rotatory round platform 4 and be connected, the upper surface of central platform 11 and the upper surface parallel and level of rotatory round platform 3 also guarantee that the surfacing prevents to cause unnecessary influence to the wind-tunnel air current.

In order to facilitate the position of the electric telescopic handle 7 of initial adjustment of the test and to facilitate the installation of the ocean anemoscope 6, the inner ring of the rotary ring platform 3 is matched with the outer ring of the central platform 11 to be provided with the alignment mark 2, the outer ring of the rotary ring platform 3 is also matched with the base 1 to be provided with the alignment mark 2, when the alignment marks 2 are aligned mutually, the electric telescopic handle 7 is accurately positioned on the leeward side of the mounting seat 5, and the alignment mark 2 also plays a role in prompting the correct installation of the propeller type ocean anemoscope 6.

In order to ensure the control accuracy when the rotary truncated cone 4 is controlled to rotate, a gear ring 18 is fixedly sleeved on the part of the rotary truncated cone 4, which is positioned in the base 1, a motor II13 is connected with a gear 17, the gear 17 is meshed with the gear ring 18, a passive belt wheel 16 is fixedly sleeved on the part of the rotary truncated cone 3, which is positioned in the base 1, a motor I10 is connected with a driving belt wheel 15, and the driving belt wheel 15 is in belt connection with the passive belt wheel 16; the radius of the gear 17 is smaller than that of the gear ring 18, and the radius of the driving belt wheel 15 is smaller than that of the driven belt wheel 16; the tongs 8 adopt flexible servo clamping jaws, can accurately and stably clamp the wind vane, and the motors I10 and II13 adopt high-precision planetary speed reducers.

The rotating shaft of the angle encoder II12 is coaxially and rigidly connected with the rotary round table 4.

The wind direction calibration method of the ocean anemometer comprises the following steps of:

s1: wind direction starting wind speed verification

S11: horizontally mounting a base 1 at the bottom in a wind tunnel in advance, and mounting a propeller type ocean anemometer 6 to be detected on a mounting seat 5;

when the propeller type ocean anemometer 6 is installed, the electric telescopic rod 7 is determined to be positioned on the leeward side of the installation seat 5 through the output values of the alignment mark 2 and the angle encoder I9, the angle of the wind vane 63 is positioned, the wind vane 63 is made to be along the axis of wind tunnel airflow, and the wind direction output of the propeller type ocean anemometer 6 is set to be 0 degree through the controller;

s12: the controller controls the electric telescopic rod 7 to ascend, controls the gripper 8 to clamp the wind vane 63, controls the motor I10 to drive the rotary ring table 3 to rotate through a belt, drives the electric telescopic rod 7 to drive the gripper 8 to drive the wind vane 63 to deflect, keeps the mounting seat 5 immovable when the wind vane 63 deflects, further ensures that the cup body 61 is immovable, and enables the wind vane 63 and the cup body 61 to rotate relatively; the controller enables the wind vane 63 to rotate to an acute angle position deviating from the airflow axis by 10 degrees according to the output value of the angle encoder I9, and controls the hand grip 8 to loosen the wind vane 63 and controls the electric telescopic rod 7 to drive the hand grip 8 to descend after the wind vane 63 is in place, so that the wind vane 63 is in a free state;

s13: starting the wind tunnel, controlling a wind tunnel frequency converter by a controller to enable the wind tunnel to generate slowly increasing airflow, simultaneously acquiring wind speed of the wind tunnel and wind direction output of a propeller type ocean anemometer 6 by the controller in the process of gradually increasing the airflow, and recording the current airflow speed as A when the wind direction output of the ocean anemometer is restored to 0 degree, wherein the unit of A is meter/second; comparing the requirements of the specification technical indexes to judge whether the wind direction starting wind speed of the propeller type ocean anemometer 6 is qualified or not, and completing automatic verification of the wind direction starting wind speed;

the specific judging method comprises the following steps: if the value of A is less than or equal to 0.5 m/s, the verified propeller type ocean anemometer 6 is judged to be qualified; if the value of A is more than 0.5 m/s, the detected propeller type ocean anemometer 6 is judged to be unqualified;

s2: performing wind direction indication value verification

S21: a base 11 is horizontally arranged at the bottom in the wind tunnel in advance, and a to-be-detected propeller type ocean anemometer 6 is arranged on an installation base 5; electrically connecting the controller with a wind direction measuring component in the propeller type ocean anemometer 6 to obtain a wind direction output value of the propeller type ocean anemometer 6;

s22: starting the wind tunnel, and enabling the controller to generate 5 m/s stable airflow in the wind tunnel, so that the tail wing position of a wind vane 63 of the propeller type ocean anemometer 6 is fixed on an airflow axis and is kept unchanged; the controller controls a motor II13 to be started, the motor II13 drives a gear 17 to rotate, the gear 17 rotates to drive a meshed gear ring 18 to rotate, the gear ring 18 rotates to drive a rotary circular table 4 to rotate, and further drive a mounting seat 5 to rotate, so that a cup body 61 of a propeller type ocean wind meter 6 is driven to rotate, because a wind vane 63 cannot rotate under the action of stable airflow, the cup body 61 and the wind vane 63 rotate relatively through a rotating shaft 62 at the moment, when the wind vane rotates to 0 degree, the wind direction output of the propeller type ocean wind meter 6 is set to be 0 degree, and the output value of an angle encoder II12 at the moment is set to be 0 degree;

s23: the controller controls the motor II13 to continue rotating, the motor II13 drives the rotating circular table 4 and the mounting base 5 to rotate, then the cup body 61 of the propeller type ocean wind meter 6 is driven to rotate to a certain detection point and then stops rotating, the detection point accurately positions the angle position of the detection point through an angle encoder II12 coaxially connected with the rotating circular table 4, and the angle encoder II12 outputs a standard angle value of the detection point, and the standard angle value is collected by the controller and recorded as a standard angle value;

s24: because stable airflow of 5 m/s is generated in the wind tunnel, the tail position of a wind vane 63 of the propeller type ocean anemometer 6 is fixed on the axis of the airflow and remains unchanged; when the cup body 61 of the propeller type ocean anemometer 6 rotates, the cup body 61 and the wind vane 63 move relatively, which is equivalent to wind direction change, at the moment, the controller directly collects the wind direction output value of the propeller type ocean anemometer 6 at the detection point of the propeller type ocean anemometer 6, the wind direction output value is recorded as a detection wind direction indicating value, the detection wind direction indicating value is compared with a standard angle value correspondingly output by the angle encoder II12 in S23, whether the ocean anemometer is qualified or not is judged according to the requirement of a procedure technical index, and the automatic detection of the ocean anemometer indicating value is completed;

the specific method for judging whether the propeller type ocean anemometer 6 is qualified or not comprises the following steps: since the measurement accuracy of the propeller type marine anemometer 6 is ± 5 °, the measurement accuracy of the angle encoder II12 is ± 0.5 ", wherein 1 ° = 3600", both are rotated by the same angle, the obtained measurement values are different; subtracting the standard angle value from the detected wind direction indication value to obtain an error value, comparing the error value with the maximum allowable error +/-5 degrees specified by the specification technical index requirement, and if the obtained error value is within the maximum allowable error range, judging that the detected ocean anemometer 4 is qualified; otherwise, the product is judged to be unqualified.

According to the scheme, the angle encoder II12 is arranged, the angle encoder II12 has the existing effective national JJF1115-2004 'photoelectric shaft angle encoder calibration standard' to achieve quantity value tracing, and the requirement of a standard building measuring standard instrument is met. The angle encoder II12 can realize digital output of the measurement result. The metering performance of the angle encoder II12 can meet the accuracy indexes of the three-class circular division standard metering devices in the national verification system table JJJG 2057-2006 'plane angle metering device verification system table', namely the maximum allowable error: plus or minus 0.5', this error is one 3600 times the scale, and accuracy is greatly improved. The angle encoder II12 can meet the measurement performance requirements of the national verification regulation JJJG 1167-2019 ocean wind measuring instrument on wind direction measurement standard instruments.

In summary, the standard angle encoder II12 can be used as a wind direction measuring standard to establish a wind direction measuring standard of the marine anemometer.

Finally, this device simple structure, convenient operation can be used for the examination of propeller type ocean anemometer wind direction indicating value and wind direction starting wind speed, can reduce test error when using this device to examine, improves the accuracy of examination result, makes the experiment more convenient, reduces the examination operation degree of difficulty, improves examination efficiency.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the above embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind direction calibrating device of an ocean anemometer comprises a base (1) horizontally arranged at the inner bottom of a wind tunnel, and is characterized in that a rotary circular table (4) is rotatably arranged at the center of the base (1), the rotating axis of the rotary circular table (4) is vertical, the upper end of the rotary circular table (4) is positioned outside the base and is coaxially connected with a mounting seat (5), and the lower end of the rotary circular table (4) is positioned in the base (1); a motor II (13) and an angle encoder II (12) are fixedly arranged in the base (1), the motor II (13) is in driving connection with the rotary circular table (4), and the angle encoder II (12) is connected with the rotary circular table (4);

the upper surface of the base (1) is horizontally and rotatably provided with a rotary ring table (4) around a mounting seat (5), the rotary center of the rotary ring table (4) is the circle center of the rotary ring table, the circle center of the rotary ring table is located on the central axis of the mounting seat (5), the rotary ring table (4) is arranged in an embedded mode, the bottom end of the rotary ring table is located in the base (1), the upper surface of the rotary ring table (4) is flush with the upper surface of the base (1), an electric telescopic rod (7) is vertically arranged on the rotary ring table (4), and the top end of the electric telescopic rod (7) is connected with a gripper (8); a motor I (10) and an angle encoder I (9) are arranged in the base (1), the motor I (10) is in driving connection with the rotary ring table (4), and the rotary ring table (4) is connected with the angle encoder I (9);

the device is characterized by further comprising a controller for controlling the wind tunnel frequency converter and acquiring wind direction output data of the propeller type ocean anemometer (6) to be detected, wherein the controller is in control connection with a motor I (10), an angle encoder I (9), a hand grip (8), a motor II (13) and an angle encoder II (12).

2. The marine anemometer wind direction verification device according to claim 1, wherein a fixing plate (14) is horizontally and fixedly arranged in the base (1), and the motor I (10), the angle encoder I (9), the motor II (13) and the angle encoder II (12) are all mounted on the fixing plate (14).

3. The marine anemometer wind direction verification device according to claim 2, wherein a central platform (11) is disposed between the rotary circular table (3) and the rotary circular table (4), the central platform (11) is fixedly connected to the fixing plate (14), the central platform (11) is rotatably connected to the rotary circular table (3), the central platform (11) is rotatably connected to the rotary circular table (4), and an upper surface of the central platform (11) is flush with an upper surface of the rotary circular table (3).

4. The marine anemometer wind direction calibration apparatus according to claim 3, wherein an inner ring of the rotary ring table (3) is provided with an alignment mark (2) in cooperation with an outer ring of the central platform (11), and the outer ring of the rotary ring table (3) is also provided with an alignment mark (2) in cooperation with the base (1).

5. The marine anemometer wind direction verification device according to claim 4, wherein a gear ring (18) is fixedly sleeved on a portion, located in the base (1), of the rotary circular table (4), the motor II (13) is connected with a gear (17), the gear (17) is meshed with the gear ring (18), a driven pulley (16) is fixedly sleeved on a portion, located in the base (1), of the rotary circular table (3), the motor I (10) is connected with a driving pulley (15), and the driving pulley (15) is connected with the driven pulley (16) through a belt.

6. Marine anemometer anemometry unit according to claim 5, characterized in that the gear (17) has a smaller radius than the ring gear (18) and the driving pulley (15) has a smaller radius than the driven pulley (16).

7. The marine anemometer wind direction calibration device according to claim 1, characterized in that the hand grip (8) adopts a flexible servo clamping jaw, and the motor I (10) and the motor II (13) adopt high-precision planetary speed reducers.

8. The marine anemometer anemometry unit according to claim 1, characterized in that the axis of rotation of the angular encoder II (12) is rigidly connected coaxially to the rotary truncated cone (4).

9. A method for calibrating the wind direction of an ocean wind meter, which is characterized in that the method for calibrating the wind direction of the ocean wind meter according to any one of claims 1 to 8 is adopted, and comprises the following steps:

s1: wind direction starting wind speed verification

S11: the base (1) is horizontally arranged at the bottom in the wind tunnel in advance, and a to-be-detected propeller type ocean anemometer (6) is arranged on the mounting seat (5);

when the propeller type ocean anemometer (6) is installed, the electric telescopic rod (7) is determined to be positioned on the leeward side of the installation base (5) through the output values of the alignment mark (2) and the angle encoder I (9), the angle of the wind vane (63) is positioned, the wind vane (63) is made to be along the axis of wind tunnel airflow, and the wind direction output of the propeller type ocean anemometer (6) is set to be 0 degree through the controller;

s12: the controller controls the electric telescopic rod (7) to ascend, controls the gripper (8) to clamp the wind vane (63), controls the motor I (10) to drive the rotary ring table (3) to rotate through a belt, drives the electric telescopic rod (7) to drive the gripper (8) to drive the wind vane (63) to deflect, keeps the mounting seat (5) motionless when the wind vane (63) deflects, further ensures that the cup body (61) is motionless, and enables the wind vane (63) and the cup body (61) to rotate relatively; the controller enables the wind vane (63) to rotate to an acute angle position deviating from the airflow axis by 10 degrees according to the output value of the angle encoder I (9), and controls the hand grip (8) to loosen the wind vane (63) and controls the electric telescopic rod (7) to drive the hand grip (8) to descend after the wind vane (63) is in a free state;

s13: starting the wind tunnel, controlling a wind tunnel frequency converter by a controller to enable the wind tunnel to generate slowly increasing airflow, simultaneously acquiring wind speed of the wind tunnel and wind direction output of a propeller type ocean anemometer (6) by the controller in the process of gradually increasing the airflow, and recording the current airflow speed as A when the wind direction output of the ocean anemometer is restored to 0 degree, wherein the unit of A is meter/second; comparing the requirements of the specification technical indexes to judge whether the wind direction starting wind speed of the propeller type ocean anemometer (6) is qualified or not, and completing automatic verification of the wind direction starting wind speed;

the specific judging method comprises the following steps: if the value of A is less than or equal to 0.5 m/s, the detected propeller type ocean anemometer (6) is judged to be qualified; if the value of A is more than 0.5 m/s, the detected propeller type ocean anemometer (6) is judged to be unqualified;

s2: performing wind direction indication value verification

S21: the base (1) (1) is horizontally arranged at the bottom in the wind tunnel in advance, and a propeller type ocean anemometer (6) to be detected is arranged on the mounting seat (5); electrically connecting the controller with a wind direction measuring component arranged in the propeller type ocean anemometer (6) to obtain a wind direction output value of the propeller type ocean anemometer (6);

s22: starting the wind tunnel, and enabling the controller to generate 5 m/s stable airflow in the wind tunnel, so that the tail wing position of a wind vane (63) of the propeller type ocean anemometer (6) is fixed on the airflow axis and is kept unchanged; the controller controls a motor II (13) to be started, the motor II (13) drives a gear (17) to rotate, the gear (17) rotates to drive a meshed gear ring (18) to rotate, the gear ring (18) rotates to drive a rotary circular table (4) to rotate, and then a mounting seat (5) is driven to rotate, so that a cup body (61) of a propeller type ocean anemometer (6) is driven to rotate, because a wind vane (63) cannot rotate under the action of stable airflow, the cup body (61) and the wind vane (63) rotate relatively through a rotating shaft (62), when the wind vane rotates to the propeller type ocean anemometer (6), the wind direction output is 0 degree, and the output value of an angle encoder II (12) is set to be 0 degree;

s23: the controller controls the motor II (13) to continue rotating, the motor II (13) drives the rotating circular truncated cone (4) and the mounting seat (5) to rotate, then the cup body (61) of the propeller type ocean wind meter (6) is driven to rotate to a certain detection point and then stops rotating, the detection point accurately positions the angle position of the detection point through an angle encoder II (12) coaxially connected with the rotating circular truncated cone (4), and the angle encoder II (12) outputs a standard angle value of the detection point, and the standard angle value is collected by the controller and recorded as a standard angle value;

s24: because stable airflow of 5 m/s is generated in the wind tunnel, the tail position of a wind vane (63) of the propeller type ocean anemometer (6) is fixed on the axis of the airflow and remains unchanged; after a cup body (61) of the propeller type ocean anemometer (6) rotates, the cup body (61) and a wind vane (63) move relatively, and wind direction changes, at the moment, a controller directly collects a wind direction output value of the propeller type ocean anemometer (6) at a detection point and records the wind direction output value as a detection wind direction indicating value, the detection wind direction indicating value is compared with the standard angle value correspondingly output by an angle encoder II (12) in S23, whether the ocean anemometer is qualified or not is judged according to the requirement of a procedure technical index, and the automatic detection of the indication value of the ocean anemometer is completed;

the specific method for judging whether the propeller type ocean anemometer (6) is qualified or not comprises the following steps: since the measurement accuracy of the propeller type marine anemometer (6) is ± 5 °, the measurement accuracy of the angle encoder II (12) is ± 0.5 ", wherein 1 ° = 3600", both rotated by the same angle, the obtained measurement values are different; subtracting the standard angle value from the detected wind direction indicating value to obtain an error value, comparing the error value with a maximum allowable error +/-5 degrees specified by the specification technical index requirement, and if the obtained error value is within the maximum allowable error range, judging that the detected ocean anemometer (4) is qualified; otherwise, the product is judged to be unqualified.