A multifunctional hydrological instrument comprehensive calibration device and a working method of the device

Abstract

The present invention discloses a multifunctional hydrological instrument comprehensive calibration device and a working method of the device, comprising: a water pool, and a track erected on the water pool; an auxiliary carriage and a main carriage arranged on the track, wherein the main carriage or the auxiliary carriage is provided with a fixed end for fixing a measuring instrument, each fixed end is provided with a laser and is respectively facing the center position of a reflecting plate on the auxiliary carriage or the main carriage, wherein the measuring instrument comprises at least one of a tide meter, a current meter and a wave meter; a controller communicatively connected with the auxiliary carriage, the main carriage and the measuring instrument realizes a set of devices having multiple working modes, and can respectively detect measuring instruments of three main ocean hydrological parameters: current, wave and tide level; in addition, the auxiliary carriage or the main carriage can be equipped with measuring instruments of the same detection direction with multiple different principles, so as to integrate the detection methods of measuring instruments with more measurement parameters and more principles as much as possible.

Description

Technical Field

[0001] The invention relates to hydrological instrument calibration, in particular to a multifunctional hydrological instrument comprehensive calibration device and a working method of the device. Background Art

[0002] There are three main problems with the existing metrological verification devices for oceanographic hydrological instruments:

[0003] First, the function is single. At present, in order to detect each type of instrument, a special detection device needs to be built. Not only that, in many cases, even if the same parameter is detected, multiple detection devices are required for measuring equipment with different principles. This has caused the detection unit to invest a lot of material resources to build various types of instruments, and there may be problems with the inability to detect instruments based on some principles. Taking my country's calibration unit as an example, the unit has a flow rate calibration pool for detecting current meters; a 10-meter-deep well for detecting tide level instruments; and a 6-meter-diameter rotating disc for detecting wave measuring instruments based on the acceleration principle. Even with so many capabilities built, it is still impossible to detect many instruments that have been widely used in practice, such as pressure wave meters and acoustic wave meters, resulting in major defects in capabilities.

[0004] Second, the degree of automation and flexibility is low. Currently, most detection equipment has a low degree of automation, and many important steps must be completed manually. For example, the wells for detecting tide level instruments require operators to manually control water injection and drainage based on the water gauge readings of the camera. This series of operations not only consumes a lot of manpower, but also causes problems such as reduced efficiency and long detection cycles, making it difficult to adapt to the current explosive growth in demand for marine instruments in my country. The flexibility of some detection equipment is also low. Taking the wave calibration device as an example, it only has three gears of 1 meter, 3 meters and 6 meters, and cannot be adjusted arbitrarily.

[0005] Third, the measurement range and accuracy of some parameters are limited. At present, the measurement range of some detection equipment is small. Taking the wave calibration device as an example, the maximum measurement capacity is only 6 meters. Although it is already the highest level in the world, the measurement capacity of wave instruments is usually about 15 meters. The measurement range of the calibration device is too small to evaluate the instrument's large wave measurement capability. Marine measurements, especially those oriented to disaster reduction and prevention, often require clear measurement capabilities and accuracy under extreme conditions. Therefore, the limited measurement range is a major defect.

[0006] Although oceanographic instruments are extremely important to national security and economic development, the oceanographic instrument market is relatively small and does not have the conditions to form unicorn enterprises. Most enterprises exist in a small but elite form. This results in limited human and material resources for enterprises, making it difficult to build ocean hydrological instrument detection devices under the current model. Summary of the invention

[0007] The present invention provides a multifunctional hydrological instrument comprehensive calibration device, which can effectively solve the above problems.

[0008] The present invention is achieved in that:

[0009] A multifunctional hydrological instrument comprehensive calibration device, comprising:

[0010] track;

[0011] The auxiliary carriage and the main carriage are arranged on the track.

[0012] The main carriage or the auxiliary carriage is provided with a fixed end for fixing a measuring instrument, each fixed end is provided with a laser and is respectively facing the center of the reflecting plate on the auxiliary carriage or the main carriage, wherein the measuring instrument includes at least one of a tide meter, a current meter and a wave meter;

[0013] A controller connected to the auxiliary crane, the main crane and the measuring instrument in communication,

[0014] Among them, when the multifunctional hydrological instrument comprehensive calibration device is installed across the top of the water pool, the controller is used to control the auxiliary carriage or the main carriage to move in different ways on the track; and obtain the motion data generated by the movement of the main carriage and the auxiliary carriage, the motion data including the position at each moment, and the motion speed, amplitude and period are calculated through the position at each moment; the controller is further used to compare the motion data with the data of the measuring instrument, and obtain the accuracy of the measuring instrument based on the data difference.

[0015] As a further improvement, the measuring instrument is a tide meter; and the controller is used to control the main vehicle to move to a predetermined position on the track, and the controller is further used to compare the predetermined position data with the data read by the tide meter, and derive the accuracy of the tide meter based on the data difference.

[0016] As a further improvement, the measuring instrument is a current meter; the current meter is arranged at the bottom of the main carriage and immersed in the water pool, and the controller is used to control the main carriage to move at a predetermined speed on the track; the controller is further used to compare the predetermined speed with the data read by the current meter, and derive the accuracy of the current meter based on the data difference.

[0017] As a further improvement, the measuring instrument is a wave meter, and the controller is used to control the auxiliary crane or the main crane to perform reciprocating motion on the track, and to predetermine the positions of two endpoints, the period and time length of the motion, and to obtain the amplitude and period of the motion of the main crane and the auxiliary crane; the controller is further used to compare the changes in the endpoint positions with the data read by the wave meter, and to derive the accuracy of the wave meter based on the data difference.

[0018] As a further improvement, the track is flush with the horizontal plane.

[0019] As a further improvement, the auxiliary crane and the main crane both include a motion component, a power component, a communication component, and a control component. The auxiliary crane and the main crane receive instructions from the controller through the communication component and transmit them to drive the motion component to move on the track.

[0020] As a further improvement, one side of the track is an active block with a tooth row, and the other side is a driven block without a tooth row, and both the active block and the driven block are connected to the motion component.

[0021] As a further improvement, the bottom and inner wall of the pool are provided with sound-absorbing plates.

[0022] As a further improvement, the controller is a type-one controller, and the main carriage and the auxiliary carriage are both provided with a type-two controller, and the type-two controller is wirelessly connected to the type-one controller via the communication component.

[0023] A working method of a multifunctional hydrological instrument comprehensive calibration device, comprising:

[0024] Step 1: Reset the main carriage and the auxiliary carriage to the end positions on both sides of the track, and connect the communication components on the main carriage and the auxiliary carriage to the controller;

[0025] Step 2: Fix the measuring instrument to be measured on the main carriage or the auxiliary carriage, and aim the laser at the auxiliary carriage or the main carriage;

[0026] Step 3: inputting driving data of the main carriage or the auxiliary carriage through a type-one controller of the controller, causing the main carriage and the auxiliary carriage to move, and recording movement data, wherein the movement data includes the position at each instant and the movement period, movement amplitude, and instantaneous speed calculated therefrom;

[0027] Step 4: Compare the recorded motion data with the data from the measuring instrument, and derive the accuracy of the measuring instrument based on the data difference.

[0028] As a further improvement, in step 2, the laser is aimed at the center position of the main driving reflector, so that the measuring instrument is vertically aligned with the reflector and centered.

[0029] As a further improvement, in step three: the main crane and the auxiliary crane need to be reset to the initial end point positions after each movement.

[0030] The beneficial effects of the present invention are:

[0031] The present invention realizes a set of devices with multiple working modes, which can respectively detect the three most important ocean hydrological parameters of current, wave and tide level. In addition, the auxiliary crane or the main crane can be equipped with measuring instruments of the same detection direction with different principles, so as to integrate the detection methods of more measurement parameters and measuring instruments with more principles as much as possible, and convert the original large-depth longitudinal calibration device in the vertical direction into a horizontal calibration device in the horizontal direction, which greatly reduces the difficulty of calibration test, and builds a set of devices capable of linear, high-precision controllable movement, which greatly saves the capital investment in detectable equipment and the necessary cost investment in civil engineering and construction.

[0032] The present invention realizes automated, high-precision and highly flexible detection capabilities through manual data input and automatic control of the controller. The user can arbitrarily set the value of the detection parameter within a reasonable and capability-allowed range, so that the auxiliary crane and the main crane can run automatically without manual intervention. It has complete fault tolerance and the ability to handle emergency situations. During the working period, all data of the working process are recorded as files and stored in the controller, which is convenient for the user to analyze and compare later.

[0033] The present invention has good expansibility and can flexibly expand the measurement range when objective conditions permit, that is, widen the length of the track. The cost increase is only linear, avoiding the financial pressure caused by exponential increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of a multifunctional hydrological instrument comprehensive calibration device provided by an embodiment of the present invention.

[0036] Figure 2 It is a logic principle diagram of a multifunctional hydrological instrument comprehensive calibration device provided by an embodiment of the present invention.

[0037] Figure 3The present invention provides a workflow diagram of a multifunctional hydrological instrument comprehensive calibration device. DETAILED DESCRIPTION

[0038] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] Reference Figure 1-3As shown, a multifunctional hydrological instrument integrated calibration device comprises: a track 2; an auxiliary carriage 3 and a main carriage 4 arranged on the track 2, wherein the main carriage 4 or the auxiliary carriage 3 is provided with a fixed end for fixing a measuring instrument, each fixed end is provided with a laser and is respectively facing the center of a reflecting plate on the auxiliary carriage 3 or the main carriage 4, wherein the measuring instrument comprises at least one of a tide meter, a current meter and a wave meter; a controller 5 communicatively connected to the auxiliary carriage 3, the main carriage 4 and the measuring instrument, wherein when the multifunctional hydrological instrument integrated calibration device is spanned and erected above a pool 1, the controller 5 is used to control the auxiliary carriage 3 or the main carriage 4 to move in different ways on the track 2; and obtain motion data generated by the movement of the main carriage 4 and the auxiliary carriage 3, wherein the motion data includes every instant The position of each moment, and the motion speed, amplitude and period are calculated through the position of each moment; the controller 5 is further used to compare the motion data with the data of the measuring instrument, and obtain the accuracy of the measuring instrument according to the data difference, wherein the length of the pool is not less than 15 meters, which can be adjusted according to the actual situation of the site, and can be larger, but cannot be reduced, otherwise the detection performance will be greatly reduced, and the side walls and bottom of the pool 1 need to have good anti-leakage treatment, the control terminal 5 is fixedly installed on the wall of the laboratory or placed on the desktop, with a touch screen, the user can select the test mode and the corresponding parameters, and transmit the above information to the auxiliary carriage 3 and the main carriage 4 through wireless communication, so as to control the movement of the auxiliary carriage 3 and the main carriage 4, and the control terminal 5 can also be connected to a large-screen display, or connected to a U disk to export the test data.

[0041] Furthermore, the measuring instrument is a tide meter; and the controller 5 is used to control the main vehicle 4 to move to a predetermined position on the track 2, and the controller 5 is further used to compare the predetermined position data with the data read by the tide meter, and derive the accuracy of the tide meter based on the data difference.

[0042] Furthermore, the measuring instrument is a current meter; the current meter is arranged at the bottom of the main carriage 4 and immersed in the water pool 1, and the controller 5 is used to control the main carriage 4 to move at a predetermined speed on the track 2; the controller 5 is further used to compare the predetermined speed with the data read by the current meter, and derive the accuracy of the current meter based on the data difference.

[0043] Furthermore, the measuring instrument is a wave meter, and the controller 5 is used to control the auxiliary carriage 3 or the main carriage 4 to make reciprocating motion on the track 2, and to predetermine the positions of two end points, the period and time length of the motion, and to obtain the amplitude and period of the motion of the main carriage 4 and the auxiliary carriage 3; the controller 5 is further used to compare the change in the position of the end points with the data read by the wave meter, and to derive the accuracy of the wave meter based on the data difference.

[0044] Since it is impossible to ensure that the concrete pool 1 is flush with the horizontal plane during construction, the track 2 must be precisely adjusted when laying the track 2 so that the track is strictly horizontal and straight throughout the entire track, the tracks 2 on both sides are equidistant, and the track 2 is flush with the horizontal plane.

[0045] Furthermore, the auxiliary crane 3 and the main crane 4 both include a motion component, a power component, a communication component, and a control component. The auxiliary crane 3 and the main crane 4 receive instructions from the controller 5 through the communication component and transmit them to drive the motion component to move on the track 2.

[0046] The power assembly consists of three parts: a servo motor, a reducer and gears. The servo motor can be precisely controlled, and the reducer can increase the torque of the power assembly, which can then better drive the auxiliary crane 3 and the main crane 4 to move through the gears.

[0047] Among them, considering that the vehicle needs to move, the traction power line will affect the movement and measurement. Therefore, the power components on the auxiliary vehicle 3 and the main vehicle 4 use batteries. The battery power is sufficient to ensure the need for 24-hour testing, and the battery charge display is convenient to remind the user to charge in time. The power component is divided into two parts: power supply and instrument power supply. The batteries are isolated from each other to avoid the power system interfering with the power supply and thus affecting the instrument measurement.

[0048] Furthermore, one side of the track 2 is an active block with a tooth row, and the other side is a driven block without a tooth row. The active block and the driven block are both connected to the motion component, and the tracks 2 on both sides remain strictly parallel.

[0049] In order to prevent the sound of water flow from being too loud and the reverberation of the water sound environment, the bottom and inner wall of the pool 1 are provided with sound-absorbing sheets.

[0050] Furthermore, the controller 5 is a type-one controller, and the main crane 4 and the auxiliary crane 3 are both provided with a type-two controller, and the type-two controller is wirelessly connected to the type-one controller via the communication component, wherein the type-two controller is used to receive the control signal of the type-one controller and can feed back the motion data to the type-one controller. Through the PLC automatic control method, only the setting parameters need to be input on the type-one controller, and the whole set of equipment can be automatically operated without manual intervention. During the detection process, all relevant parameters can be automatically recorded and stored as files for the user's subsequent analysis.

[0051] Furthermore, the track 2 is provided with a scale with a scale accuracy of 1 mm.

[0052] Furthermore, the pool 1 has an automatically controlled water inlet and outlet system, which can automatically fill and drain water, thereby reducing the difficulty of manual water control.

[0053] A working method of a multifunctional hydrological instrument comprehensive calibration device, comprising:

[0054] Step 1: Reset the main carriage 4 and the auxiliary carriage 3 to the end positions on both sides of the track 2, and connect the communication components on the main carriage 4 and the auxiliary carriage 3 to the controller 5;

[0055] Step 2: Fix the measuring instrument to be measured on the main carriage 4 or the auxiliary carriage 3, and aim the laser at the auxiliary carriage 3 or the main carriage 4;

[0056] Step 3: Input the driving data of the main carriage 4 or the auxiliary carriage 3 through a controller of the controller 5, so that the main carriage 4 and the auxiliary carriage 3 move, and record the movement data, which includes the position at each moment and the movement period, movement amplitude, and instantaneous speed calculated accordingly;

[0057] Step 4: Compare the recorded motion data with the data from the measuring instrument, and derive the accuracy of the measuring instrument based on the data difference.

[0058] In order to ensure that the position of the laser projected light is on the reflective plate to avoid affecting the experimental results, in step 2, the laser is aimed at the center position of the reflective plate of the main vehicle 4, so that the measuring instrument is vertically aligned with the reflective plate and centered.

[0059] Furthermore, in step three: the main crane 4 and the auxiliary crane 3 need to be reset to the initial end point positions after each movement.

[0060] The specific working method is divided into three working modes, namely positioning mode, constant speed mode and reciprocating motion mode. Among them, the positioning mode is used to measure tide level observation equipment, the constant speed mode is used to measure flow velocity observation equipment, and the reciprocating motion mode is used to measure wave observation equipment.

[0061] In the positioning mode, it can be used to detect tide and water level measuring instruments such as air acoustic tide level meter, microwave radar tide level meter, laser ranging water level meter, etc. The specific operation is: after selecting the positioning mode on the controller 5, the auxiliary carriage 3 and the main carriage 4 are respectively positioned at the end positions on both sides of the track 2. Thereafter, the auxiliary carriage 3 remains stationary, and the tide level sensor to be detected is installed on the auxiliary carriage 3, and is aligned with the center position of the reflector on the main carriage 4 under the guidance of the laser. The positioning position of the main carriage 4 can be input on the controller 5, and then the main carriage 4 automatically runs to the set position and stops, records its own position, and prompts the operator that it is in position. At this time, the operator can operate the tide level meter to obtain the instrument reading, and compare the instrument reading with the controller 5 reading, which can be used to detect the measurement accuracy of the tide level meter. By repeating multiple detection positions in this way, the full-scale test results of the tide level meter can be obtained.

[0062] In the constant speed mode, it can be used to detect the Doppler principle current meter and the propeller type mechanical rotating current meter. After the constant speed mode is selected on the control screen of the controller 5, the auxiliary carriage 3 and the main carriage 4 are respectively positioned at the end positions on both sides of the track 2. Thereafter, the auxiliary carriage 3 remains stationary, and the flow velocity sensor to be detected is installed on the main carriage 4 and extended into the pool 1 through the connecting rod, located at the central depth position of the pool, and the current meter is started to measure the flow velocity. The constant speed of the main carriage 4 can be input on the controller 5, and then the main carriage 4 accelerates to the speed in a short time and maintains a uniform motion until it is about to run to the end of the track, and the main carriage 4 is stopped by braking. In addition to using the available speed data to evaluate the measured instrument, the main carriage 4 will also synchronously record the position and speed data of each moment of the whole process for subsequent in-depth analysis. By comparing the speed data of the main carriage 4 with the speed data of the current meter, it can be used to detect the measurement accuracy of the current meter.

[0063] In the reciprocating mode, it can be used to detect wave observation equipment such as air acoustic wave meter, hydroacoustic wave meter, microwave ranging wave meter, acceleration wave meter, and marine wave meter. After selecting the reciprocating mode on the control panel, the two cranes are positioned at the end positions on both sides of the track. At this time, there are the following two situations:

[0064] In the first case, when the non-marine wave meter is selected for detection on the controller 5, the auxiliary carriage 3 remains stationary, the sensor of the wave meter based on the distance measurement principle is installed on the auxiliary carriage 3, and the sensor of the wave meter based on the acceleration principle is installed on the main carriage 4. After the absolute positions of the two end points of the reciprocating motion of the main carriage 4, the motion cycle and the total motion time length are input on the controller 5, the device automatically controls the main carriage 4 to reciprocate according to the set parameters, and the main carriage 4 can simulate the ups and downs of the waves. The instrument to be detected then starts measuring, and the data obtained by the two are compared to obtain the measurement result;

[0065] The second situation is that when the ship wave meter is selected for detection on the controller 5, the wave sensor is installed on the auxiliary crane 3. After the absolute positions of the two end points of the reciprocating motion of the main crane 4 and the auxiliary crane 3, the motion cycle and the total motion time length are input on the controller 5, the device automatically controls the main crane 4 and the auxiliary crane 3 to reciprocate according to the set parameters. At this time, the main crane 4 simulates the ups and downs of the sea surface, and the auxiliary crane 3 simulates the ups and downs of the ship. The instrument being detected then starts measuring, and the data obtained from the two are compared to obtain the measurement result.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional hydrological instrument comprehensive calibration device, characterized in that: include: Track (2); An auxiliary carriage (3) and a main carriage (4) are arranged on the track (2), The main carriage (4) or the auxiliary carriage (3) is provided with a fixed end for fixing a measuring instrument, each fixed end is provided with a laser and is respectively facing the center of a reflector on the auxiliary carriage (3) or the main carriage (4), wherein the measuring instrument comprises at least one of a tide meter, a current meter and a wave meter; A controller (5) is communicatively connected to the auxiliary crane (3), the main crane (4) and the measuring instrument. The auxiliary crane (3) and the main crane (4) each include a motion component, a power component, a communication component and a control component. The auxiliary crane (3) and the main crane (4) receive instructions from the controller (5) through the communication component and transmit the instructions to drive the motion component to move on the track (2); When the multifunctional hydrological instrument integrated calibration device is installed across the top of the pool (1), the controller (5) is used to control the auxiliary carriage (3) or the main carriage (4) to move in different ways on the track (2); and obtain motion data generated by the movement of the main carriage (4) and the auxiliary carriage (3), wherein the motion data includes the position at each instant, and the motion speed, amplitude and period are calculated based on the position at each instant; the controller (5) is further used to compare the motion data with the data of the measuring instrument, and obtain the accuracy of the measuring instrument based on the data difference.

2. A multifunctional hydrological instrument comprehensive calibration device as claimed in claim 1, characterized in that: The measuring instrument is a tide meter; and the controller (5) is used to control the main vehicle (4) to move to a predetermined position on the track (2); the controller (5) is further used to compare the predetermined position data with the data read by the tide meter, and derive the accuracy of the tide meter based on the data difference.

3. A multifunctional hydrological instrument comprehensive calibration device as claimed in claim 1, characterized in that: The measuring instrument is a current meter; the current meter is arranged at the bottom of the main carriage (4) and immersed in the water pool (1), and the controller (5) is used to control the main carriage (4) to move at a predetermined speed on the track (2); the controller (5) is further used to compare the predetermined speed with the data read by the current meter, and obtain the accuracy of the current meter based on the data difference.

4. A multifunctional hydrological instrument comprehensive calibration device as claimed in claim 1, characterized in that: The measuring instrument is a wave meter, and the controller (5) is used to control the auxiliary carriage (3) or the main carriage (4) to perform reciprocating motion on the track (2), and to predetermine the positions of two end points, the period and time length of the motion, and to obtain the amplitude and period of the motion of the main carriage (4) and the auxiliary carriage (3); the controller (5) is further used to compare the change in the position of the end points with the data read by the wave meter, and to obtain the accuracy of the wave meter based on the data difference.

5. A multifunctional hydrological instrument comprehensive calibration device according to claim 3, characterized in that: One side of the track (2) is an active block with a tooth row, and the other side is a driven block without a tooth row. Both the active block and the driven block are connected to a motion component.

6. A multifunctional hydrological instrument comprehensive calibration device according to claim 1, characterized in that: The bottom and inner wall of the pool (1) are both provided with sound-absorbing sheets.

7. A multifunctional hydrological instrument comprehensive calibration device according to claim 1, characterized in that: The controller (5) is a type-one controller, and the main crane (4) and the auxiliary crane (3) are both provided with type-two controllers, and the type-two controllers are wirelessly connected to the type-one controller via a communication component.

8. A working method of the multifunctional hydrological instrument comprehensive calibration device according to any one of claims 1 to 7, characterized in that: include: Step 1: Reset the main trolley (4) and the auxiliary trolley (3) to the end positions on both sides of the track (2), and connect the communication components on the main trolley (4) and the auxiliary trolley (3) to the controller (5); Step 2: Fix the measuring instrument to be measured on the main carriage (4) or the auxiliary carriage (3), and aim the laser at the auxiliary carriage (3) or the main carriage (4); Step 3: inputting driving data of the main carriage (4) or the auxiliary carriage (3) through a controller (5) of a first type, causing the main carriage (4) and the auxiliary carriage (3) to move, and recording movement data, wherein the movement data includes the position at each instant and the movement period, movement amplitude, and instantaneous speed calculated therefrom; Step 4: Compare the recorded motion data with the data from the measuring instrument, and derive the accuracy of the measuring instrument based on the data difference.

9. The working method of the multifunctional hydrological instrument comprehensive calibration device according to claim 8 is characterized in that: In step 2, the laser is aimed at the center of the reflective plate of the main vehicle (4), so that the measuring instrument is vertically aligned with the reflective plate and centered.

10. The working method of a multifunctional hydrological instrument comprehensive calibration device according to claim 8, characterized in that: In step three: the main crane (4) and the auxiliary crane (3) need to be reset to the initial end point position after each movement.

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