CN109990842B - Hydrology current surveying instrument inclination performance detector - Google Patents
Hydrology current surveying instrument inclination performance detector Download PDFInfo
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- CN109990842B CN109990842B CN201910332931.4A CN201910332931A CN109990842B CN 109990842 B CN109990842 B CN 109990842B CN 201910332931 A CN201910332931 A CN 201910332931A CN 109990842 B CN109990842 B CN 109990842B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention provides a dip angle performance detector of a hydrological flow measuring instrument, which comprises a workbench, a table board base plate, a limiting baffle, HV series horizontal and vertical dual-purpose high-precision distribution discs, two groups of connecting rods, a pressing block, a connecting angle plate and a three-dimensional current meter clamp, wherein the table board base plate is arranged on the workbench, the HV series horizontal and vertical dual-purpose high-precision distribution discs are fixed on the table board base plate through the pressing block and a fastening piece, the two groups of limiting baffles are respectively fixed on two sides of the high-precision distribution discs, the high-precision distribution discs are transitionally connected to the three-dimensional current meter clamp through the connecting angle plate, the connecting angle plate comprises two mutually vertical connecting surfaces, one connecting surface is connected with the high-precision distribution disc, the other connecting surface is connected with the three-dimensional current meter clamp, and the connecting rod is fixed at the top of the three-dimensional current meter clamp and is used for assisting in supporting the three-dimensional current meter. The invention can realize the detection of the inclination angle accuracy of the instrument with the inclination angle monitoring function of oceans and rivers, and is particularly suitable for the calibration occasion of the inclination angle monitoring instrument in the fields of hydrology and hydraulic engineering industries.
Description
Technical Field
The invention belongs to the technical field of hydrological instrument detection, and relates to a detector for detecting the inclination angle performance of a hydrological flow measuring instrument.
Background
The dip angle monitoring performance of the hydrological flow measurement instrument has great influence on the flow rate calculation precision and the flow test accuracy: the method is related to the accuracy of water resource measurement and the production and life of people. In estuary regions of some great rivers, the hydrological conditions are complex due to the influence of tides; in some northern rivers, the main stream swings and the inclination angle is also variable due to shallow river channel width. In order to ensure the accuracy of the flow rate test, the flow measuring instrument is required to have good inclination angle performance (that is, the instrument is ensured to better meet the water flow direction), so that the accuracy of the inclination angle of the hydrological flow measuring instrument needs to be detected.
To the current meter based on research of inclination method, when rivers strike, the current meter main part is rotatory around hanging the axle in midair, produces certain inclination, and in stable flow field, the geometry, kinematics, the dynamics characteristic of inclination and velocity of flow are relevant. The features include weight, center of gravity, water displacement, center of buoyancy, and the positions of the instrument body and the guide tail fin. The relationship between flow rate and inclination is thus obtained from the balance of the torques to which the current meter is subjected in the current, in that the relationship between inclination and flow rate is substantially sigmoidal, as shown in figure 8. Wherein the solid line represents the relationship between the inclination angle and the flow velocity in the fresh water, the dotted line represents the relationship between the inclination angle and the flow velocity in the seawater, and the sea current meter is almost vertical to the flow direction at low flow velocity obtained by correction, and the flow velocity is proportional to the square of the inclination angle, and is shown as sharp rise at the origin in the figure; when the inclination angle approaches 90 °, the response of the current meter becomes sluggish, showing a sharp rise around 90 ° in the figure: in the middle 10-70 deg. region, the flow rate is roughly proportional to the angle, and in this region, the error of estimating the flow rate by the inclination angle is the smallest.
At present, three-dimensional acoustic current meters and acoustic Doppler profile current meters (ADCPs) which are commonly used in the ocean industry can be used for acquiring the flow direction of water flow. At present, a special inclination angle detector is lacked for carrying out angle detection and calibration on the instrument. How to calibrate and check the inclination performance and the accuracy of the hydrological flow meter is always a big problem in the hydrological industry of China.
The Nanjing Water conservancy hydrological automation research institute of the Water conservancy department originally designs a double-platform measuring rod, the parallelism between the double platforms is strictly controlled, synchronous pitching linkage can be completed, the upper platform is used for installing a standard inclinometer, and a gravity accelerometer is used as a sensor to measure the inclination angle. The following is used for installing an acoustic current meter (ADCP), and when the acoustic current meter (ADCP) measures the flow direction inclination in water, the upper platform inclinometer sensor outputs an inclination value for comparison measurement to indirectly detect the inclination accuracy of the current meter. However, the cost is high, the linkage mechanism is complex, the underwater flow measurement instrument is difficult to assemble and disassemble and difficult to observe, direct traceable data are lacked, so that the dip angle detection of the hydrological flow measurement instrument is still a big problem, and even some places are forced to not carry out dip angle measurement, and the quality of flow data is seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention discloses a detector for detecting the inclination angle performance of a hydrological flow measuring instrument, which can detect the accuracy of a built-in inclination angle device of the measured instrument and ensure the accuracy of obtaining flow velocity and flow. The invention adopts the main and auxiliary dividing discs for dividing scales, the minimum resolution precision of the dividing disc is 10', the transmission precision of the dividing disc of the high-precision milling machine is ensured, and the traceability is realized.
In order to achieve the purpose, the invention provides the following technical scheme:
the dip angle performance detector for the hydrological flow measuring instrument comprises a workbench, a table board base plate, limiting baffles, HV series horizontal and vertical high-precision distribution discs, connecting frame rods, pressing blocks, connecting angle plates and a three-dimensional current meter clamp, wherein the table board base plate is arranged on the workbench, the HV series horizontal and vertical high-precision distribution discs are fixed on the table board base plate through the pressing blocks and fasteners, the limiting baffles are divided into two groups and are respectively fixed on two sides of the high-precision distribution discs, the high-precision distribution discs are transitionally connected to the three-dimensional current meter clamp through the connecting angle plates, the connecting angle plates comprise two mutually perpendicular connecting surfaces, one of the connecting surfaces is connected with the high-precision distribution disc, the other connecting surface is connected with the three-dimensional current meter clamp, and the connecting frame rods are fixed at the top of the three-dimensional current meter clamp and used for assisting in supporting the three-dimensional current meter.
Furthermore, after the upper part of the pressing block penetrates into the groove and is tightly attached to the dividing disc, a gap is reserved between the lower part of the pressing block and the dividing disc.
Furthermore, the HV series horizontal and vertical dual-purpose high-precision dividing disc workbench is provided with 1-360 degree graduations, adopts a main dividing disc and an auxiliary dividing disc to divide the graduations, comprises a dividing ring with the scale value of 1 'and a vernier ring with the minimum resolution value of 10', and is provided with a braking and dividing worm falling mechanism.
Furthermore, six grooves are formed in the connecting surface of the high-precision dividing disc and the connecting angle plate, and fixing holes corresponding to the grooves are formed in the connecting surface of the connecting angle plate and the high-precision dividing disc.
Furthermore, the verticality of two connecting surfaces of the connecting angle plate and the planeness of the upper surface both reach 0.03 mm.
Further, still include the desk lamp of setting on the workstation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the device can realize the detection of the inclination angle accuracy of the instrument with the inclination angle monitoring function of oceans and rivers, and is particularly suitable for the calibration occasion of the inclination angle monitoring instrument in the fields of hydrology and hydraulic engineering industries; the method can be applied to the detection of the inclination performance and the precision of various instruments with the inclination monitoring function, and has wide application range.
2. The detector of the invention introduces the HV series horizontal and vertical dual-purpose high-precision dividing disc, ensures the measuring accuracy, the dividing disc is directly installed through the connecting angle plate or is switched to various hydrological flow measuring instruments through the clamp, the universality is good, the installation is simple, and individual special-shaped instruments only need to be additionally provided with the installation clamp according to the requirements; therefore, the equipment can be upgraded by replacing the dividing disc, and is convenient to maintain.
Drawings
Fig. 1 is a schematic front view of an assembly structure of the inclination angle performance detector of the hydrological flow measuring instrument provided by the invention.
FIG. 2 is a side schematic view of FIG. 1 with the table lamp removed for clarity.
FIG. 3 is a view showing a groove surface structure of a high-precision scale for both transverse and vertical use in HV series.
Fig. 4 is a front view of a connecting gusset plate structure.
FIG. 5 is a schematic diagram showing the hole site distribution of the upper surface jig on the top of the connection gusset.
Fig. 6 is a schematic structural front view of a clamp of a three-dimensional hydrological flow measurement instrument.
FIG. 7 is a schematic top view of a clamp structure of a three-dimensional hydrological flow measuring instrument.
FIG. 8 is a schematic view of a current meter inclination angle versus flow rate.
Detailed Description
The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.
As shown in the figures 1 and 2, the inclination performance detector of the hydrological current measuring instrument provided by the invention comprises a workbench 1, a table top base plate 2, a limit baffle 3, an HV series horizontal and vertical high-precision division scale 4, a side link 5, an M10 hexagon head bolt 6 at the side link, an M8 hexagon head bolt 7 at a clamp lug plate and a matched flat washer 8 thereof, a desk lamp 9, an M8 hexagon head bolt 10 at the limit baffle and a matched standard type elastic washer 11 thereof, an M12 inner hexagon flat round head bolt 12 for connecting the table top base plate and a matched super large washer 13, a hexagon nut 14, a press block 15, an M12 inner hexagon head bolt 16 for connecting the press block and a matched corner plate standard type elastic washer 17 thereof, a connecting 18, a three-dimensional current meter clamp 19, a three-dimensional current meter 20, an M10 hexagon head bolt 21 for connecting the current meter clamp and a matched standard type elastic washer 22 and a flat washer 23 thereof, a T12 for connecting the dividing plate and the corner plate and an elastic washer 25 thereof, The indexing plate comprises a flat washer 26, a hexagon nut 27, an M16 hexagon head fine-tooth bolt 28 for fixing the indexing plate, and an elastic washer 29 and a flat washer 30 which are matched with the bolt. The HV series horizontal and vertical dual-purpose high-precision dividing disc 4 is fixed on the table board base plate 2 through a pressing block 15 and fasteners 16, 17, 28, 29 and 30, a countersunk hole is formed in the upper portion of the pressing block 15 (2 pieces in total) and is L-shaped, after the upper portion of the pressing block 15 (2 pieces in total) is inserted into the groove and is tightly attached to the dividing disc, a 1 mm gap is reserved between the lower portion of the pressing block and the dividing disc, and the maximum contact extrusion area is ensured. The worktable 1 is of a wood structure, and the upper surface is smooth. The limiting baffles 3 (2 groups in total, are in an inverted V shape and form an inclined plane for limiting the dividing disc) are fixed on the left side and the right side of the high-precision dividing disc 4, the fixing hole sites are arranged in an asymmetric mode, and the inclination amplitude measured by the inclination angle performance detector of the hydrological flow measuring instrument can be enlarged after the fixing hole sites are respectively arranged in an inverted mode. The HV series horizontal and vertical dual-purpose high-precision dividing disc 4 has a worktable with 1-360 degree graduations, adopts a main dividing disc and an auxiliary dividing disc to divide the graduations, and has a dividing ring with a scale value of 1 'and a vernier ring with a minimum resolution value of 10'. The rotary worktable is provided with a braking and indexing worm dropping mechanism. The desk lamp 9 plays a role of light supplement during instrument detection.
As shown in fig. 2, fig. 1 and fig. 6, the HV series horizontal and vertical dual-purpose high-precision indexing disc 4 is fixed on the table board backing plate 2, the table board backing plate 2 is fixed on the workbench 1 through a fastener, the indexing disc 4 is transitionally connected to the three-dimensional current meter clamp 19 and the three-dimensional current meter 20 through the connecting angle plate 18, and the connecting angle plate 18 of the related key parts requires that the verticality of two working surfaces and the flatness of an upper surface of the connecting angle plate reach 0.03mm, so that when the indexing disc of the detector is rotated to 0 position after the indexing disc is installed, the levelness of the upper surface of the connecting angle plate is checked by using a circular bubble or a frame level meter, and the situation that the levelness of the connecting angle plate is within 30' is ensured.
As shown in fig. 3, fig. 1, fig. 2 and fig. 4, the connection angle plate 18 is connected by the T-shaped groove bolt 24 of M12 for six long grooves in fig. 3 and its associated elastic washer 25, flat washer 26 and hexagonal nut 27, and the groove state is shown as the initial 0 position state of the detecting instrument of the present invention. Before use, the HV series horizontal and vertical dual-purpose high-precision division disc is arranged on a standard flat plate, the positions of grooves are rotated by 60 degrees from the state shown in figure 3 to enable a pair of grooves to be in a horizontal state, a dial indicator is arranged on the standard flat plate to detect the levelness of the two grooves, the grooves are sequentially rotated by 60 degrees to detect the horizontal planes of the three groups of grooves, and the results show that the levelness of the grooves is 0.02mm, which indicates that the relative positions of the grooves and the transmission precision of a worm turbine of the high-precision division disc are qualified.
As shown in fig. 4, the diameter of each of the 6 connecting through holes in the connecting angle plate is 13mm, which is 1 mm larger than the nominal diameter of the bolt for the T-shaped groove of M12, so that a fine adjustment room is left when the level adjustment of the upper plane of the connecting angle plate 18 is ensured, the connecting angle plate 18 is integrally and precisely welded, the surface of a part is plated with hard chrome, and rib plates on two sides are additionally arranged to play a role in supporting and reinforcing.
As shown in fig. 5, 3 sets of holes (the reference circles are Φ 136.78, Φ 180, Φ 191, respectively) are provided on the connection angle plate for connecting interfaces of different instruments, so that the universality is strong. As can be seen from fig. 5, the connection angle plate is connected with the clamp through 4 circular holes, the upper portion of the three-dimensional galvanometer clamp 19 adopts an opening structure, and two sets of ear plates are designed for clamping the measured instrument, wherein the diameters of two ends of the middle portion of the three-dimensional galvanometer clamp are smaller than the diameter of the middle portion of the three-dimensional galvanometer clamp by 1 mm, so that the measured instrument can be reliably mounted in the clamp body.
The inclination angle performance detector firstly corrects a desktop before installation, then a desktop base plate is installed on a working desk, a frame type level meter is adopted for detection, after the levelness of the plane on the desktop base plate is ensured, an index plate is installed on the basis, after the index plate is installed, the index plate is rotated to 0 scale, and then a circular bubble or frame type level meter is used for detecting the levelness of the plane on a connecting angle plate, so that the levelness is ensured to be within 30', and the inclination angle performance detector is proved to be installed horizontally.
After the installation is finished, a detection task can be carried out, and when an instrument is detected, the three-dimensional current meter 20 frame part is horizontally arranged on a special three-dimensional current meter clamp 19 of the inclination angle detector, so that the detection work of the instrument can be carried out only by locking two groups of lug plates after the axis of the current meter 20 is in a vertical state. The measured instrument is in a normal working state, the movable turntable of the dividing disc is rotated through the rotating handle of the dividing disc 4, the pointer of the dividing disc 4 is placed at the 0 position of the worktable dividing line, the scale ring 0 is placed at the 0 position of the vernier ring dividing line, and the flow direction value is read after the display value of the measured instrument is stable and is recorded in the verification recording table. And then the scale ring 1 is rotated clockwise to the position of the vernier ring scale line 0 through the rotating handle of the dividing plate 4, and the 1-degree point is verified. The calibration point is used for calibrating each time the scale ring rotates by 1 degree; the degree of each detection point can also be determined according to the related requirements of the measured instrument.
When the inclination angle detector is used for detecting the inclination angle of the hydrological flow measuring instrument, the movable rotary disc of the index plate is required to be calibrated at +/-45 degrees in clockwise (forward rotation) and anticlockwise (reverse rotation) respectively. The verification work is carried out by two persons, one person operates the reading, and the other person supervises and records. The interpretation accuracy is required to be 10 "or less.
(1) The difference between the positive and reverse readings of the same detection point is in accordance with the calibration requirement of the inclination precision of the measured instrument, and the measurement can be judged to be qualified.
(2) Formula for calculating error of indication value of dip angle of each detected point
Δγi＝γi-γ0i (1)
In the formula: delta gammai-i detecting the dip angle reading error of the point, (°);
γi-i detecting the inclination reading of the point detector, (°);
γ0ii actual inclination angle reading value of the measured instrument at the fixed point, (°).
The inclination angle performance detector of the hydrological flow measuring instrument is required to keep clean appearance, and particularly, the scale marks and the pointer are required to be kept clean. The operational use is preferably determined by the stationary personnel. Tilt range of inclinometer: the angle of the rotary plate is between minus 45 degrees and plus 45 degrees, and the index plate is adjusted according to the specification of the index plate during detection, so that the index plate is manually rotated to 1, 2, 3 and 4 integer digits, and the rotary plate is just aligned to an angle line, thereby facilitating reading; when the light is poor, the desk lamp can be turned on to enhance the light source; when the device is needed, the limiting baffles on the two sides can be simultaneously replaced and installed, and the detection inclination angle range can be slightly enlarged.
The marine current instrument inclination performance detector has the advantages of calibrating and checking the measurement precision of the inclination of the hydrological current measuring instrument and finishing the detection task of the inclination performance of the hydrological current measuring instrument.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (6)
1. Hydrology current surveying instrument inclination performance detector, its characterized in that: comprises a workbench, a table board base plate, a limit baffle, an HV series horizontal and vertical dual-purpose high-precision dividing disc, a connecting frame rod, a pressing block, a connecting angle plate and a three-dimensional current meter clamp, the table board base plate is arranged on the workbench, the HV series horizontal and vertical dual-purpose high-precision dividing disc is fixed on the table board base plate through a pressing block and a fastener, the two groups of limit baffles are respectively fixed at two sides of the HV series horizontal and vertical dual-purpose high-precision dividing scale and are provided with inclined planes for limiting the dividing scale, the HV series horizontal and vertical dual-purpose high-precision distribution disc is transitionally connected to a three-dimensional current meter clamp through a connecting angle plate, the connecting angle plate comprises two connecting surfaces which are vertical to each other, one of the two-dimensional high-precision horizontal and vertical high-precision horizontal and vertical high-horizontal high-precision horizontal and vertical high-horizontal high-precision horizontal high-precision high-horizontal high-precision high-horizontal high-, the side link is fixed on the top of the three-dimensional current meter clamp and used for assisting in supporting the three-dimensional current meter.
2. The hydrological flow measurement instrument inclination performance detector according to claim 1, wherein: the upper part of the pressing block penetrates into the groove and is tightly attached to the HV series horizontal and vertical dual-purpose high-precision dividing disc.
3. The hydrological flow measurement instrument inclination performance detector according to claim 1, wherein: the workbench of the HV series horizontal and vertical dual-purpose high-precision division disc is provided with 1-360 degree graduations, adopts the main and auxiliary division discs to divide the graduations, comprises a scale ring with the scale value of 1 'and a vernier ring with the minimum resolution value of 10', and is provided with a braking and division worm falling mechanism.
4. The hydrological flow measurement instrument inclination performance detector according to claim 1, wherein: six grooves are arranged on the connecting surface of the HV series horizontal and vertical dual-purpose high-precision distribution disc and the connecting angle plate, and fixing holes corresponding to the grooves are arranged on the connecting surface of the connecting angle plate and the HV series horizontal and vertical dual-purpose high-precision distribution disc.
5. The hydrological flow measurement instrument inclination performance detector according to claim 1, wherein: the verticality of two connecting surfaces of the connecting angle plate and the planeness of the upper surface both reach 0.03 mm.
6. The hydrological flow measurement instrument inclination performance detector according to claim 1, wherein: the desk lamp is arranged on the workbench.
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| CN114812617B (en) * | 2022-07-01 | 2022-10-04 | 深圳市沃感科技有限公司 | Intelligent inclination angle calibration device and calibration method thereof |
| CN117214461B (en) * | 2023-08-31 | 2024-04-09 | 江苏微之润智能技术有限公司 | Suspension wing type flow velocity meter calibration method based on fusion algorithm |
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| JPH0222507A (en) * | 1988-07-11 | 1990-01-25 | Sanou:Kk | Measuring instrument for inclination, level, and speed variation |
| JPH03180713A (en) * | 1989-12-08 | 1991-08-06 | Nec Corp | Optical measuring instrument for very small rotation angle |
| CN104764444B (en) * | 2015-04-10 | 2017-08-25 | 国家海洋局第一海洋研究所 | A kind of seat bottom type section current meter real-time monitor and its application method |
| CN106290987B (en) * | 2016-08-04 | 2020-02-07 | 中国船舶重工集团公司第七一九研究所 | Method for assessing water speed measurement precision by Doppler log |
| CN106526236A (en) * | 2016-10-31 | 2017-03-22 | 河北科技大学 | Method and device for calibrating current meter flow direction |
| CN206411136U (en) * | 2017-01-17 | 2017-08-15 | 南京蓝钰信息科技有限公司 | The support frame of flow measurement support |
| CN207000763U (en) * | 2017-07-06 | 2018-02-13 | 广州海洋地质调查局 | A kind of full substrate bottom-sitting type seabed subsurface buoy and its measuring system |
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