CN108414057A - A kind of contactless water-level gauge testing calibration device - Google Patents

Abstract

The invention provides a non-contact water level meter detection and calibration device, comprising: an industrial computer, a base on the bottom surface, 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 the guide rail, a device The suspension bracket above the detection platform, and the water pool arranged under the detection platform. The invention changes the positions of the detected water level gauge and the standard water level gauge in the vertical direction, can simulate the relative change of the on-site water level gauge and the position of the water surface, and realize the precision detection of the non-contact water level gauge; the detection platform is precisely positioned and detected through the servo motor control The platform positioning deviation is better than ±3mm; due to the use of high-precision range finder and high-precision level control system, the water level detection accuracy is better than 1mm; the data accuracy of the water level monitoring instrument is effectively guaranteed, and the traditional water level platform detection method is not enough Defects in the measurement range and accuracy.

Description

A non-contact water level gauge 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 type water level gauge, pressure type water level gauge, ultrasonic water level gauge, microwave (radar) water level gauge, etc. In recent years, non-contact water level gauges such as radar water level gauges imported 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 regime measurement and reporting systems. Various products of 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 type, pressure type, and pendent hammer type. The water level in the well rises or falls, and the data of the tested water level gauge and the standard water level gauge are collected to realize the detection and calibration of the water level gauge. Due to the launch 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 applied to the detection of non-contact water level gauge.

Contents 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 gauge, which realizes the detection and calibration of the non-contact water level gauge, and ensures the accuracy and consistency of the water level monitoring data of the non-contact water level gauge.

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

A non-contact water level meter detection and calibration device, comprising: an industrial computer, a bottom base, a guide rail support arranged on the bottom base, a detection platform support arranged on the guide rail support and capable of moving up and down along the guide rail, and a detection platform above the detection platform Suspension brackets, a water pool arranged under the detection platform; the guide rail support includes two linear guide rails, and the detection platform support includes a vertical mounting plate arranged on the linear guide rails and a detection plate vertically connected to the vertical mounting plate platform, the vertical mounting plate moves through the gear and the rack on the guide rail bracket, the gear is driven by the first driving mechanism, the detection platform is provided with a roller, a second driving mechanism for driving the roller, an arc An arc-shaped turntable mounting plate and a standard water level gauge mounting hole, the arc-shaped turntable mounting plate is connected with a level adjustment device, and the suspension bracket is connected with the drum through a wire rope.

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

Further, a slider is installed on the vertical mounting plate, and the slider slides on the linear guide rail.

Further, the second driving mechanism is a servo motor.

Further, the level adjustment device is a two-dimensional arc turntable.

Further, the guide rail bracket includes vertically arranged metal frames, connecting plates are arranged between the metal frames, and the metal frame is also connected to the floating base and the adjustment block, the floating base is connected to the wall, and the adjustment block is fixed with an installation auxiliary The plate, the adjustment block and the wall are fixedly connected by an L-shaped plate.

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

Further, the suspension bracket includes pulleys and fixed lugs, and the fixed lugs are connected to the drum through wire ropes.

Further, the standard water level gauge is a laser water level gauge, and a laser reflection plate is installed in the 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 invention fixes the position of the water surface, changes the positions of the detected water level gauge and the standard water level gauge in the vertical direction, and can simulate the relative changes between the on-site water level gauge and the water surface position, and realize the precision detection of the non-contact water level gauge; The servo motor controls the precise positioning of the detection platform, and the positioning deviation of the detection platform is better than ±3mm; due to the use of high-precision range finder and high-precision level control system, the water level detection accuracy is better than 1mm.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the non-contact water level gauge detection and calibration device provided by the present invention;

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

Fig. 3 is the left view of Fig. 2;

Figure 4 is a schematic diagram of the detection platform support structure;

Figure 5 is a schematic diagram of rack and pinion cooperation;

Figure 6 is a schematic diagram of the structure of the suspension bracket;

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

Explanation of reference signs:

1-suspension bracket, 2-rail bracket, 3-detection platform bracket, 4-pool, 5-laser reflector, 6-bottom base, 7-industrial computer, 8-stair wall, 9-pulley, 10-fix Lifting lug, 11-wall support, 12-roller, 13-roller support, 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-installation plane of the detected water level gauge.

Detailed ways

The present invention will be 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 intended 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 the directions in the drawings, and the words "inner" and "outer ” refer to directions toward or away from the geometric center of a particular part, respectively.

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

As shown in Fig. 2 and Fig. 3, the guide rail support 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 support and parallel to the guide rails. 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 frames 27 are arranged vertically, and the H-shaped metal connecting plates 30 are 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, and the position of the floating base moves along the vertical wall direction when the overall structure of the guide rail is installed. When the whole guide rail frame is on a plane, The position can be locked. The installation auxiliary 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 and the wall are fixedly connected by an L-shaped plate 29, and the distance between the adjustment block and the wall is adjusted by moving along the left and right directions in the figure . The guide rail bracket 2 is installed on the wall of the stairwell, effectively utilizing the space and saving the construction cost.

As shown in Figure 4, the detection platform support 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 support 2 and is installed vertically. The plate 23 is provided with a hole, 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 Figure 5, the gear 24 passes through the hole and is arranged on the guide rail bracket 2 Gear rack 25 cooperates. A slider 20 is installed on the back of the vertical mounting plate, and the slider 20 slides on the linear guide rail 19, so that the vertical mounting plate is connected with the guide rail through the slider, and the vertical mounting plate and the detection platform bracket connected to it are as a whole along the direction of the guide rail. move. The detection platform 17 is vertically fixed on the bottom of the vertical mounting plate 23 . A servo motor 14 and a drum 12 are arranged on the detection platform 17 , the drum 12 is connected to the detection platform 17 through a drum bracket 13 , and the drum 12 is coaxially connected to the servo motor 14 . The detection platform 17 is also provided with an arc-shaped turntable mounting plate 16 and a standard water level gauge mounting hole 18, the arc-shaped turntable mounting plate 16 is used for installing the arc-shaped turntable, and the standard water level gauge mounting hole 18 is used for installing a standard water level gauge. As shown in Figure 7, the two-dimensional arc turntable 15 is installed in reverse on the lower side of the arc turntable mounting plate 16, the detected water level gauge installation plane 33 is installed on the underside of the two-dimensional arc turntable, and the detected water level gauge installation plane 33 is installed on the upper side The inclination sensor 32 is installed, and the detected water level gauge is installed on the lower side, and 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 support 3 is also provided with an outer frame, which is used to strengthen the overall firmness and protect the equipment on the detection platform.

As shown in FIG. 6 , the suspension bracket 1 includes a pulley 9 and fixed lugs 10 , the suspension bracket 1 is fixed on the columns on both sides through wall supports 11 , and the fixed lugs 10 are connected with the drum 12 through wire ropes.

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

This device is controlled by industrial computer 7, and industrial computer 7 is provided with control and data acquisition system, and industrial computer is connected with servomotor 22, worm gear reducer 21, servomotor 14, two-dimensional arc turntable 15 (here connected as electrical connection or 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 of this type of water level gauge.

The working principle of this device is as follows:

When using this non-contact water level gauge detection and calibration device, before the test, pour water into the pool to a height of (30-40) cm, and wait for the water surface to be calm; when the detection platform is at the initial zero position, the non-contact water level gauge (such as radar type, ultrasonic, laser water level gauge) is installed on the detection platform below the installation plane of the tested water level gauge, and the horizontality of the tested water level gauge installation surface is better than 0.5 degrees. The standard water level gauge (high-precision laser ranging sensor) is installed on the installation hole of the standard water level gauge, and the angle measurement data of the two-dimensional arc-shaped turntable obtained by the inclination sensor is monitored on the industrial computer, and the angle of rotation and adjustment of the two-dimensional arc-shaped turntable is controlled to ensure The installed surface of the tested water level gauge is level with the standard water level gauge, and the positioning deviation of the detection platform is ±3mm. Set the zero position of the tested instrument and the standard water level gauge. The industrial computer controls the rotation of the servo motor and the servo motor to drive the gear and the roller to rotate. 50cm, the detection platform stops once, and the industrial computer collects the water level value of the tested instrument and the standard water level gauge through the acquisition system. After the detection platform rises to the position of 10m, it starts to fall. Every time it falls 50cm, the detection platform stops once, and it is complete detection when it falls to the initial position. process. The industrial computer saves the collected water level value and compares the accuracy.

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

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, some 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 (9)

1. a kind of contactless water-level gauge testing calibration device, it is characterised in that：Including industrial personal computer, bottom surface pedestal, it is arranged the bottom of at Rail brackets on the pedestal of face are arranged on rail brackets and can detected along detection platform holder that guide rail moves up and down, setting Pipe-hanging hook above platform, the pond being arranged below detection platform；The rail brackets include two the linear guides, described Detection platform holder includes the horizontal mounting plate being arranged in the linear guide and the detection that is vertically connected in horizontal mounting plate Platform, the horizontal mounting plate is coordinated by the rack on gear and rail brackets to be moved, and the gear is by the first driving mechanism It drives, roller, the second driving mechanism for driving drum, arc turntable mounting plate and standard is provided in the detection platform Water-level gauge mounting hole, the arc turntable mounting plate are connected with level(l)ing device, and the pipe-hanging hook passes through steel wire rope and rolling Cylinder is connected.

2. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：First driving machine Structure includes coaxially connected servo motor and turbine and worm retarder, and the turbine and worm retarder and gear are coaxially connected.

3. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：The horizontal mounting plate On be also equipped with sliding block, the slide block set slides in the linear guide.

4. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：Second driving machine Structure is servo motor.

5. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：The Level tune dress It is set to two-dimentional arc turntable.

6. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：The rail brackets packet The metal framework being vertically arranged is included, connecting plate is provided between metal framework, metal framework is also connected with floating foundation and adjustment Block, floating foundation are connected with wall, and the auxiliary plate of installation is fixed in adjustment block, is fixedly connected by L-type plate between adjustment block and wall.

7. contactless water-level gauge testing calibration device according to claim 1 or 6, it is characterised in that：The guide rail branch Frame is mounted on wall.

8. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：The pipe-hanging hook packet Pulley and fixed lifting lug are included, fixed lifting lug is connect by steel wire rope with roller.

9. contactless water-level gauge testing calibration device according to claim 1, it is characterised in that：The normal water level meter For laser water-level gauge, laser reflection plate is installed in the pond, the laser reflection plate is right against normal water level meter mounting hole Lower section.