CN108414057B - Non-contact type water level gauge detection and calibration device - Google Patents

Abstract

The invention provides a non-contact water level gauge detection and calibration device, which comprises: the device comprises an industrial personal computer, a bottom surface base, a guide rail bracket arranged on the bottom surface base, a detection platform bracket arranged on the guide rail bracket and capable of moving up and down along a guide rail, a suspension bracket arranged above the detection platform and a water pool arranged below the detection platform. According to the invention, the positions of the detected water level gauge and the standard water level gauge are changed in the vertical direction, so that the relative change of the site water level gauge and the water surface position can be simulated, and the precision detection of the non-contact water level gauge is realized; the servo motor is used for controlling the detection platform to accurately position, and the positioning deviation of the detection platform is better than +/-3 mm; the water level detection precision is better than 1mm due to the adoption of the high-precision range finder and the high-precision horizontal control system; the data accuracy of the water level monitoring instrument is effectively ensured, and the defect that the traditional water level detection method cannot reach enough measurement range and accuracy is overcome.

Description

A non-contact water level meter detection and calibration device

Technical Field

The invention belongs to the technical field of water level gauge detection, and relates to a non-contact water level gauge detection and calibration device.

Background technique

Water level monitoring is one of the most basic monitoring elements in hydrological monitoring. Commonly used water level gauges include float water level gauges, pressure water level gauges, ultrasonic water level gauges, microwave (radar) water level gauges, etc. In recent years, non-contact water level gauges such as radar water level gauges introduced from abroad have mature technology, high measurement accuracy, easy installation, and are not restricted by the environment and geography. Therefore, they are adopted by many automatic water condition monitoring and reporting systems, and various types of domestic non-contact water level gauges are also developing rapidly. The current water level gauge detection and calibration method is mainly aimed at traditional water level gauges such as float, pressure, and pendulum. The detected water level gauge and the standard water level gauge are fixed on the same horizontal plane above the water level logging well. The water level in the water level logging well is raised or lowered through the water supply and drainage automatic control system, and the data of the detected water level gauge and the standard water level gauge are collected to realize the detection and calibration of the water level gauge. However, due to the emission angle of the non-contact water level gauge, the traditional water level logging has certain limitations in the application of non-contact water level gauge detection and cannot be used in the detection of non-contact water level gauges.

Summary of the invention

In order to solve the above problems, the present invention discloses a device for detecting and calibrating a non-contact water level meter, which realizes the detection and calibration of the non-contact water level meter and ensures the accuracy and consistency of the water level monitoring data of the non-contact water level meter.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A non-contact water level gauge detection and calibration device comprises: an industrial computer, a bottom base, a guide rail bracket arranged on the bottom base, a detection platform bracket arranged on the guide rail bracket and movable up and down along the guide rail, a suspension bracket arranged above the detection platform, and a water pool arranged below the detection platform; the guide rail bracket comprises two linear guide rails, the detection platform bracket comprises a vertical mounting plate arranged on the linear guide rails and a detection platform vertically connected to the vertical mounting plate, the vertical mounting plate moves in cooperation with a rack on the guide rail bracket through a gear, the gear is driven by a first driving mechanism, a roller, a second driving mechanism for driving the roller, an arc turntable mounting plate and a standard water level gauge mounting hole are arranged on the detection platform, the arc turntable mounting plate is connected to a horizontal adjustment device, and the suspension bracket is connected to the roller through a wire rope.

Furthermore, the first driving mechanism includes a servo motor and a worm gear reducer coaxially connected, and the worm gear reducer is coaxially connected to the gear.

Furthermore, a sliding block is installed on the vertical mounting plate, and the sliding block slides on the linear guide rail.

Furthermore, the second driving mechanism is a servo motor.

Furthermore, the horizontal adjustment device is a two-dimensional arc turntable.

Furthermore, the guide rail bracket includes a vertically arranged metal frame, a connecting plate is arranged between the metal frames, the metal frame is also connected to a floating base and an adjustment block, the floating base is connected to the wall, an auxiliary mounting plate is fixed on the adjustment block, and the adjustment block is fixedly connected to the wall via an L-shaped plate.

Furthermore, the guide rail bracket is installed on the wall.

Furthermore, the suspension bracket includes a pulley and a fixed lifting lug, and the fixed lifting lug is connected to the drum through a steel wire rope.

Furthermore, the standard water level gauge is a laser water level gauge, and a laser reflection plate is installed in the water pool, and the laser reflection plate is directly below the installation hole of the standard water level gauge.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The detection and calibration device provided by the present invention fixes the water surface position and changes the positions of the detected water level meter and the standard water level meter in the vertical direction, so as to simulate the relative change between the on-site water level meter and the water surface position and realize the precision detection of the non-contact water level meter; the detection platform is precisely positioned by controlling the servo motor, and the positioning deviation of the detection platform is better than ±3mm; due to the use of a high-precision rangefinder and a high-precision horizontal control system, the water level detection accuracy is better than 1mm.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a non-contact water level gauge detection and calibration device provided by the present invention;

Figure 2 is a schematic diagram of a guide rail bracket;

Fig. 3 is a left side view of Fig. 2;

FIG4 is a schematic diagram of the structure of the detection platform support;

Figure 5 is a schematic diagram of the gear rack matching;

FIG6 is a schematic diagram of the suspension bracket structure;

FIG. 7 is a schematic diagram of the connection of the arc turntable.

Description of reference numerals:

1-suspension bracket, 2-guide rail bracket, 3-detection platform bracket, 4-water pool, 5-laser reflector, 6-bottom base, 7-industrial computer, 8-stair wall, 9-pulley, 10-fixed lifting ear, 11-wall support, 12-roller, 13-roller bracket, 14-servo motor, 15-two-dimensional arc turntable, 16-arc turntable mounting plate, 17-detection platform, 18-standard water level gauge mounting hole, 19-linear guide, 20-slider, 21-worm gear reducer, 22-servo motor, 23-vertical mounting plate, 24-gear, 25-rack, 26-floating base, 27-metal frame, 28-adjustment block, 29-L-type plate, 30-H-type metal connecting plate, 31-installation auxiliary plate; 32-inclination sensor, 33-mounting plane of the detected water level gauge.

Detailed ways

The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

As shown in Figure 1, the non-contact water level meter detection and calibration device includes an industrial computer 7, a detection platform bracket 3, a suspension bracket 1, a guide rail bracket 2, and a bottom base 6, wherein the bottom base 6 is arranged at the bottom of the device as a whole, the guide rail bracket 2 is arranged on the bottom base 6, one side of the guide rail bracket 2 is fixed to the wall 8, the suspension bracket 1 is arranged above the detection platform bracket 3, the detection platform bracket 3 is arranged on the guide rail bracket 2 and is perpendicular to the guide rail bracket 2, and there is a square water pool 4 (3m*3m) directly below the detection platform bracket.

As shown in Figures 2 and 3, the guide rail bracket 2 has two linear guide rails 19 for the detection platform to move up and down, and a rack 25 is installed on one side of the guide rail bracket parallel to the guide rail. Its structure specifically includes a metal frame 27, a floating base 26, an H-shaped metal connecting plate 30, and an auxiliary mounting plate 31. The metal frame 27 is vertically arranged, and the H-shaped metal connecting plate 30 is connected between adjacent metal frames 27 to enhance stability. The metal frame 27 is also connected to the floating base 26 and the adjustment block 28. The floating base 26 is connected to the wall. When the overall structure of the guide rail is installed, the floating base moves in the direction perpendicular to the wall. When the entire guide rail frame is on the same plane, the position can be locked. The auxiliary mounting plate 31 is fixed on the adjustment block 28 as a connecting piece between the adjustment block and the aluminum profile. The adjustment block 28 is fixedly connected to the wall by an L-shaped plate 29, and moves in the left and right directions in the figure to adjust the distance between the adjustment block and the wall. The guide rail bracket 2 is installed on the wall of the stairwell, which effectively utilizes space and saves construction costs.

As shown in FIG4 , the detection platform bracket 3 includes a detection platform 17, a vertical mounting plate 23, a servo motor 22, a worm gear reducer 21, and a gear 24, wherein the vertical mounting plate 23 is arranged on the guide rail bracket 2, a hole is arranged on the vertical mounting plate 23, the servo motor 22 is coaxially connected with the worm gear reducer 21, and the worm gear reducer 21 is coaxially connected with the gear 24, as shown in FIG5 , the gear 24 passes through the hole and cooperates with the rack 25 arranged on the guide rail bracket 2. A slider 20 is installed on the back of the vertical mounting plate, and the slider 20 slides on the linear guide rail 19, whereby the vertical mounting plate is connected to the guide rail through the slider, and the vertical mounting plate and the detection platform bracket connected thereto move along the guide rail direction as a whole. The detection platform 17 is vertically fixed at the bottom of the vertical mounting plate 23. A servo motor 14 and a roller 12 are arranged on the detection platform 17, and the roller 12 is connected to the detection platform 17 through the roller bracket 13, and the roller 12 is coaxially connected to the servo motor 14. The detection platform 17 is also provided with an arc turntable mounting plate 16 and a standard water level gauge mounting hole 18. The arc turntable mounting plate 16 is used to mount the arc turntable, while the standard water level gauge mounting hole 18 is used to mount the standard water level gauge. As shown in FIG7 , the arc turntable mounting plate 16 is reversely mounted on the lower side of the two-dimensional arc turntable 15, the lower side of the two-dimensional arc turntable is mounted with a mounting plane 33 of the detected water level gauge, the upper side of the mounting plane 33 of the detected water level gauge is mounted with a tilt sensor 32, and the lower side is mounted with the detected water level gauge. The two-dimensional arc turntable 15 can drive the detected water level gauge on the plane of the detected water level gauge mounting plate to rotate. The detection platform bracket 3 is also provided with an outer frame to enhance the overall firmness and protect the equipment on the detection platform.

As shown in FIG6 , the suspension bracket 1 includes a pulley 9 and a fixed lifting lug 10 . The suspension bracket 1 is fixed to the columns on both sides through a wall support 11 . The fixed lifting lug 10 is connected to a drum 12 through a steel wire rope.

A laser reflector is installed on the water surface of the pool 4, and the laser reflector is directly below the installation hole of the standard water level meter. The pool can be filled and drained by the water supply and drainage system, or by artificial water filling and drainage. The effective diameter of the pool is 3m.

The device is controlled by an industrial computer 7, which is provided with a control and data acquisition system. The industrial computer is connected to a servo motor 22, a worm gear reducer 21, a servo motor 14, and a two-dimensional arc turntable 15 (the connection here is an electrical connection or a data connection) to control the operation of these devices. The industrial computer 7 can store data and automatically calculate the final detection and calibration results, and can be directly applied to the daily detection and calibration work of this type of water level meter.

The working principle of this device is as follows:

When using this non-contact water level meter detection and calibration device, water is poured into the pool to a height of (30-40) cm before the test, and the water surface is calm; when the detection platform is at the initial zero position, the non-contact water level meter to be detected (such as radar, ultrasonic, laser water level meter) is installed below the installation plane of the detected water level meter on the detection platform, and the installation surface of the detected water level meter is better than 0.5 degrees. The standard water level meter (high-precision laser ranging sensor) is installed on the installation hole of the standard water level meter, and the two-dimensional arc turntable angle measurement data obtained by the inclination sensor is monitored on the industrial computer, and the two-dimensional arc turntable is controlled to rotate and adjust the angle to ensure that the detected water level meter is level with the installation surface of the standard water level meter, and the positioning deviation of the detection platform is ±3mm. Set the zero position of the instrument to be tested and the standard water level gauge, the industrial computer controls the servo motor and the servo motor to rotate, driving the gear and the roller to rotate. The detection platform starts to rise along the guide rail under the drive of the vertical gear and the traction of the wire rope connected to the roller. The detection platform stops once every 50cm rise. The industrial computer collects the water level values of the instrument to be tested and the standard water level gauge through the acquisition system. After the detection platform rises to the 10m position, it begins to descend. Every 50cm descent, the detection platform stops once. The descent to the initial position is a complete detection process. The industrial computer saves the collected water level values and performs accuracy comparison.

In the present invention, the water surface position remains unchanged, and the detected water level meter and the standard water level meter are fixedly installed on a detection platform above the water surface. The rise or fall of the detection platform is controlled by the servo motor automatic control system, and the relative position of the detection platform and the water surface is changed to achieve the purpose of simulating water level changes, thereby realizing the detection and calibration of the non-contact water level meter. The effective range of water level measurement is 0 to 10m, and the water level measurement accuracy is better than 1mm. The present invention effectively ensures the data accuracy of the water level monitoring instrument, and makes up for the defect that the traditional water level platform detection method cannot achieve sufficient measurement range and accuracy.

The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a non-contact water level gauge detects calibrating device which characterized in that: the device comprises an industrial personal computer, a bottom surface base, a guide rail bracket arranged on the bottom surface base, a detection platform bracket arranged on the guide rail bracket and capable of moving up and down along a guide rail, a suspension bracket arranged above the detection platform and a water pool arranged below the detection platform; the guide rail support comprises two linear guide rails, the detection platform support comprises a vertical mounting plate arranged on the linear guide rails and a detection platform vertically connected to the vertical mounting plate, the vertical mounting plate is matched with a rack on the guide rail support for movement through a gear, the gear is driven by a first driving mechanism, a roller, a second driving mechanism for driving the roller, an arc-shaped rotary table mounting plate and a standard water level gauge mounting hole are arranged on the detection platform, the arc-shaped rotary table mounting plate is connected with a horizontal adjusting device, and the suspension support is connected with the roller through a steel wire rope; the horizontal adjusting device is a two-dimensional arc-shaped rotary table, a detected water level gauge installation plane is arranged on the lower side of the two-dimensional arc-shaped rotary table, the two-dimensional arc-shaped rotary table can drive a detected water level gauge on the detected water level gauge installation plane to rotate, and an inclination sensor is arranged on the upper side of the detected water level gauge installation plane; the industrial personal computer monitors the angle measurement data of the two-dimensional arc-shaped turntable acquired by the inclination angle sensor, and controls the rotation of the two-dimensional arc-shaped turntable to adjust the angle so as to ensure that the detected water level gauge is level with the standard water level gauge mounting surface;

the non-contact water level gauge detection and calibration device detects through the following steps:

when the non-contact water level gauge is used for detecting and calibrating the device, water is injected into the water tank before the test, and the water surface is calm;

When the detection platform is in an initial zero position, a detected non-contact water level gauge is arranged below a detected water level gauge installation plane of the detection platform, the levelness of a detected water level gauge installation surface is better than 0.5 degree, and a standard water level gauge is arranged on a standard water level gauge installation hole; monitoring angle measurement data of the two-dimensional arc-shaped turntable acquired by the inclination angle sensor on the industrial personal computer, controlling the two-dimensional arc-shaped turntable to rotate for adjusting the angle, and ensuring the level of the installation surfaces of the water level gauge to be detected and the standard water level gauge;

Setting a detected water level gauge and a standard water level gauge zero position, controlling a servo motor and a servo motor to rotate by an industrial personal computer, driving a gear and a roller to rotate, enabling a detection platform to start to rise along the direction of a guide rail under the traction of a vertical gear and a steel wire rope connected with the roller, stopping the detection platform once every time when the detection platform rises, acquiring the water level values of the detected instrument and the standard water level gauge through an acquisition system, starting to descend after the detection platform rises to a preset highest position, and stopping the detection platform once every time when the detection platform descends to an initial position, wherein the detection platform falls to a complete detection process;

And the industrial personal computer stores the collected water level value and performs accuracy comparison.

2. The non-contact water level gauge detection calibration device of claim 1, wherein: the first driving mechanism comprises a servo motor and a worm gear reducer which are coaxially connected, and the worm gear reducer is coaxially connected with a gear.

3. The non-contact water level gauge detection calibration device of claim 1, wherein: and the vertical mounting plate is also provided with a sliding block, and the sliding block is sleeved on the linear guide rail to slide.

4. The non-contact water level gauge detection calibration device of claim 1, wherein: the second driving mechanism is a servo motor.

5. The non-contact water level gauge detection calibration device of claim 1, wherein: the guide rail support comprises a metal frame which is vertically arranged, a connecting plate is arranged between the metal frames, the metal frame is also connected with a floating base and an adjusting block, the floating base is connected with a wall, an auxiliary plate is fixed on the adjusting block, and the adjusting block is fixedly connected with the wall through an L-shaped plate.

6. The non-contact water level gauge detection and calibration device of claim 1 or 5, wherein: the guide rail bracket is mounted on a wall.

7. The non-contact water level gauge detection calibration device of claim 1, wherein: the suspension bracket comprises a pulley and a fixed lifting lug, and the fixed lifting lug is connected with the roller through a steel wire rope.

8. The non-contact water level gauge detection calibration device of claim 1, wherein: the standard fluviograph laser fluviograph is characterized in that a laser reflecting plate is arranged in the water tank and is right below a standard fluviograph mounting hole.