CN212206290U - Device for automatically reading liquid level and scale position during verification of common glass measuring device - Google Patents

Abstract

The invention discloses a device for automatically reading liquid level and scale position during the verification of a common glass measuring device. The electronic balance A and the fixing device are arranged on the workbench, the fixing device comprises a clamping part and a supporting part, and the clamping part is provided with a camera C; the lower end surface of the workbench is provided with a workbench surface micro-adjusting device and a measuring cylinder image acquisition device; a through hole is formed in the workbench, a measuring cylinder is arranged below the through hole, and the measuring cylinder is placed on the electronic balance B; the periphery of the workbench is also provided with an image acquisition device for a sample A to be detected respectively, and the image acquisition device for the sample A to be detected comprises a camera A and a camera A adjusting unit for adjusting the position of the camera A; the rear of workstation is equipped with the liquid feeding device, and the liquid feeding device includes liquid feeding unit and is used for adjusting the liquid feeding unit adjustment portion of liquid feeding unit position, is equipped with camera B on the liquid feeding unit adjustment portion. The automatic leveling or vertical, automatic weighing, automatic liquid adding, liquid level and scale position automatic reading and calculation of the gauge to be detected can be realized.

Description

Device for automatically reading liquid level and scale position during verification of common glass measuring device

Technical Field

The invention relates to the technical field of metrological verification, in particular to a device for automatically reading liquid level and scale positions during verification of a common glass measuring device.

Background

The glass measuring apparatus commonly used in the laboratory mainly comprises a burette, a suction pipe, a measuring flask, a measuring cylinder, a measuring cup and the like, the glass measuring apparatus can meet the problem of carrying out human eye observation and judgment on the lowest point of the liquid level concave part and the scale position of the glass measuring apparatus no matter a weighing method or a capacity comparison method is adopted in the verification and calibration process, the accuracy of verification and calibration is inevitably influenced due to the fact that the technical condition, the observation visual angle and the like of each person are greatly different, and no reading device for replacing human eyes to automatically finish the observation and judgment on the lowest point of the liquid level concave part and the scale position exists at present.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides a device for automatically reading the liquid level and the scale position by calibrating a common glass measuring device.

A device for automatically reading liquid level and scale position during calibration of a common glass measuring device comprises a workbench, wherein an electronic balance A for weighing a sample A to be calibrated and a fixing device for fixing a sample B to be calibrated are fixedly arranged on the workbench, the fixing device comprises a clamping part and a supporting part capable of adjusting the position of the clamping part, the clamping part is fixedly connected with the supporting part through a connecting sleeve M, the lower end of the supporting part is fixed on the workbench, and a camera C for acquiring images of the height of the sample B to be calibrated is arranged on the clamping part;

a worktable surface micro-adjusting device and a measuring cylinder image acquisition device are fixedly arranged on the lower end surface of the worktable; the lower end of the workbench surface degree micro-adjustment device is fixed on the ground, and the measuring cylinder image acquisition device comprises a camera D for acquiring images of the liquid level of the standard liquid in the measuring cylinder and a camera D adjustment unit for adjusting the height of the camera D; the workbench is also provided with a through hole, a measuring cylinder for receiving a standard liquid discharged from a sample B to be detected is arranged below the through hole, the measuring cylinder is placed on an electronic balance B, and the electronic balance B is fixed on the ground;

the periphery of the workbench is also provided with an image acquisition device for a sample A to be detected, and the image acquisition device for the sample A to be detected is fixed on the ground; the image acquisition device for the sample A to be detected comprises a camera A for acquiring an image of the liquid level of a standard liquid in the sample A to be detected and a camera A adjusting unit for adjusting the position of the camera A;

a liquid adding device for adding standard liquid into the sample A to be detected and the sample B to be detected is arranged behind the workbench, the liquid adding device comprises a liquid adding unit and a liquid adding unit adjusting part for adjusting the position of the liquid adding unit, and the liquid adding unit adjusting part is provided with a camera B for carrying out image acquisition on the upper opening of the sample A to be detected;

the electronic balance A, the electronic balance B, the camera C, the camera D and the four cameras A are all electrically connected with the input end of the display PLC controller, and the clamping part, the supporting part, the workbench surface micro-adjusting device, the camera D adjusting unit, the camera A adjusting unit and the liquid adding unit adjusting part are all electrically connected with the output end of the display PLC controller. This application can realize waiting to examine the automatic of examining the gage and make level or perpendicular, automatic weighing, automatic liquid feeding, liquid level and scale position automatic reading and calculation, and furthest eliminates artificial interference factor, improves examination calibration quality and efficiency, promotes the automation.

Preferably, the clamping part comprises an electric clamping jaw, two clamping fingers of the electric clamping jaw are respectively connected with a clamping part, the clamping part comprises a connecting block fixedly connected with the clamping fingers and two clamping rods fixedly connected with the connecting block, the two clamping rods are arranged in parallel, each clamping rod consists of a strip-shaped rod, an arc rod and an extension straight rod which are sequentially connected, the strip-shaped rods are fixedly connected with the connecting block, and an arc-shaped groove formed between the arc rods of the two clamping parts is used for clamping samples B to be detected with different diameters; and the electric clamping jaw is electrically connected with the output end of the display PLC controller.

Preferably, the support part comprises a vertical shaft servo motor L fixed on the workbench, the upper end of a vertical shaft L of the vertical shaft servo motor L is fixedly connected with a vertical electric push rod M, and the upper part of a telescopic end M of the vertical electric push rod M is fixedly connected with the electric clamping jaw through a connecting sleeve; and the vertical shaft servo motor L and the vertical electric push rod M are electrically connected with the output end of the display PLC controller. The position of clamping part can be effectively adjusted through the arrangement, and the purpose that the lower end of the sample B to be detected clamped by the clamping part is aligned to the position of the through hole on the workbench is achieved.

Preferably, an elastic wear-resistant layer is further arranged on the inner side face of any one of the clamping rods. This above-mentioned setting can effectively improve the stability of the sample B of waiting to decide of holding rod centre gripping.

Preferably, the worktable surface fine adjustment device comprises four vertical electric push rods A fixed on the ground, and the vertical electric push rods A are hinged with the lower end surface of the worktable through spherical hinges; and the vertical electric push rod A is electrically connected with the output end of the display PLC controller. The purpose of the arrangement is that the vertical electric push rod A works to enable the telescopic end A to slightly extend or shorten, the spherical hinge above the telescopic end A synchronously rotates, so that the inclination of the workbench is adjusted, and finally the purpose that the horizontal scale mark on the sample A to be detected and the vertical axis central line position image of the sample A to be detected meet the programming regulation requirement is achieved.

Preferably, the camera D adjusting unit comprises a fixing sleeve N for fixing the camera D, and the fixing sleeve N is fixedly connected with a telescopic end N of the vertical electric push rod N; and the vertical electric push rod N is electrically connected with the output end of the display PLC controller. The camera D is fixedly connected with the telescopic end N of the telescopic structure through the fixing sleeve N and can be conveniently adjusted in position so that the height of the camera D and the liquid level in the measuring cylinder are on the same plane.

Preferably, the camera a adjusting unit comprises a vertical electric push rod B fixed on the ground, a vertical shaft servo motor C is fixedly connected to a telescopic end B of the vertical electric push rod B, a vertical shaft C of the vertical shaft servo motor C is fixedly connected to a horizontal shaft servo motor D, a fixed sleeve D is fixedly arranged on a horizontal shaft D of the horizontal shaft servo motor D, and a camera a is fixed in the fixed sleeve D; and the vertical electric push rod B, the vertical shaft servo motor C and the horizontal shaft servo motor D are electrically connected with the output end of the display PLC controller. In the above arrangement, the vertical electric push rod B is arranged to adjust the position of the camera a in the vertical direction, the vertical axis servo motor C is arranged to rotate the camera a about the vertical axis C to adjust the position of the camera a, and the horizontal axis servo motor D is arranged to rotate the camera a about the horizontal axis D to adjust the position of the camera a.

Preferably, the liquid adding unit comprises a standard liquid containing bottle which is fixedly connected with a metering pump through a spiral telescopic pipe, and the metering pump is fixedly connected with a liquid adding pipe; and the metering pump is electrically connected with the output end of the display PLC controller. This above-mentioned setting, the required standard liquid volume of accurate addition in the sample to be examined of measuring pump can be according to the standard liquid addition quantity value that the demonstration PLC controller predetermines.

Preferably, the standard liquid containing bottle is further provided with a dustproof unit, the dustproof unit comprises a liquid outlet electromagnetic valve connected with a water outlet at the lower part of the standard liquid containing bottle, the liquid outlet electromagnetic valve is connected with the spiral telescopic pipe, a bottle stopper electromagnetic valve is further arranged at the bottle mouth of the standard liquid containing bottle, and a breathable dustproof filter screen is further fixedly arranged at an air inlet at the end part of the bottle stopper electromagnetic valve; the liquid outlet electromagnetic valve and the bottle stopper electromagnetic valve are both electrically connected with the output end of the display PLC controller, and the display PLC controller is used for controlling the liquid outlet electromagnetic valve and the bottle stopper electromagnetic valve to be opened or closed simultaneously. In the arrangement, the liquid outlet solenoid valve and the bottle stopper solenoid valve are controlled by the display PLC to be opened simultaneously when a sample to be detected needs to be detected, so that when the detection is not carried out by using the device, the problem that the detection result is influenced because dust falls into the standard liquid containing bottle through the bottle opening of the standard liquid containing bottle can be effectively prevented; and the setting of the ventilative dustproof filter screen that bottle plug solenoid valve tip was equipped with can effectively prevent to have the dust to fall into the problem that the examination result was influenced in the bottle was held to standard liquid through the bottle plug solenoid valve of opening again to the in-process that awaits measuring the sample and add standard liquid at standard liquid.

Preferably, the liquid adding unit adjusting part comprises a standard liquid containing bottle adjusting unit and a liquid adding pipe adjusting unit.

Preferably, the standard liquid containing bottle adjusting unit comprises a vertical electric push rod E fixed on the ground, the upper end of a telescopic end E of the vertical electric push rod E is fixedly connected with a vertical shaft servo motor F, a vertical shaft F of the vertical shaft servo motor F is fixedly connected with a fixing sleeve G, a fixing frame is fixedly arranged at the upper end of the fixing sleeve G, and the standard liquid containing bottle is placed in the fixing frame; and the vertical electric push rod E and the vertical shaft servo motor F are electrically connected with the output end of the display PLC. The position of standard liquid holding bottle can effectively be adjusted to this above-mentioned setting.

Preferably, the liquid feeding pipe adjusting unit comprises a horizontal electric push rod G fixed in a fixed sleeve G, the end part of a telescopic end G of the horizontal electric push rod G is fixedly connected with a horizontal shaft servo motor I, the end part of a horizontal shaft I of the horizontal shaft servo motor I is fixedly connected with a fixed sleeve J, a vertical electric push rod J is fixedly connected in the fixed sleeve J, the end part of a telescopic end J of the vertical electric push rod J is fixedly connected with a flange plate J, the right side of the upper end surface of the flange plate J is fixedly connected with a fixed sleeve K, and a camera B for vertically shooting downwards is fixedly connected in the fixed sleeve K; the metering pump is fixed on the lower end face of the flange plate J; and the horizontal electric push rod G, the horizontal shaft servo motor I and the vertical electric push rod J are electrically connected with the output end of the display PLC controller. The above arrangement can effectively adjust the position of the liquid feeding pipe.

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

this application can realize waiting to examine the automatic of examining the gage and make level or perpendicular, automatic weighing, automatic liquid feeding, liquid level and scale position automatic reading and calculation, and furthest eliminates artificial interference factor, improves examination calibration quality and efficiency, promotes the automation.

Drawings

FIG. 1 is a schematic structural view in elevation section of the present application;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1;

fig. 4 is an enlarged view of a top view of the clamping device of fig. 2.

In the figure: 1. vertical electric push rods B, 2, telescopic ends B, 3, flange plates B, 4, a display PLC controller, 5, vertical shaft servo motors C, 6, flange plates C, 7, horizontal shaft servo motors D, 8, fixing sleeves D, 9, cameras A, 10, horizontal shafts D, 11, vertical shafts C, 12, vertical electric push rods E, 13, electronic balances A, 14, telescopic ends E, 15, flange plates E, 16, vertical shaft servo motors F, 17, vertical shafts F, 18, flange plates F, 19, fixing sleeves G, 20, horizontal electric push rods G, 21, standard liquid containing bottle fixing frames, 22, standard liquid containing bottles, 23, bottle mouths, 24, bottle stopper electromagnetic valves, 25, air-permeable dustproof filter screens, 26, liquid outlet electromagnetic valves, 27, spiral telescopic pipes, 28, telescopic ends G, 29, flange plates H, 30, vertical electric push rods J, 31, fixing sleeves J, 32 and flange plates I, 33. horizontal axis servo motors I and 34, telescopic ends J and 35, fixed sleeves K and 36, cameras B and 37, flange plates J and 38, a liquid feeding pipe 39, samples A and 40 to be detected, a workbench 41, a cock 42, a fixed sleeve M and 43, an extending straight rod 44, samples B and 45 to be detected, an electric clamping jaw 46, telescopic ends M and 47, connecting sleeves M and 48, cameras C and 49, vertical electric push rods M and 50, flange plates L and 51, the vertical axis servo motor L, 52, the vertical axis servo motor L, 53, the spherical hinge 54, the telescopic end A, 55, the vertical electric push rod A, 56, the electronic balance B, 57, the measuring cylinder 58, the camera D, 59, the vertical electric push rod N, 60, the telescopic end N, 61, the fixed sleeve N, 62, the horizontal axis I, 63, the through hole 64, the metering pump 65, the clamping finger 66, the connecting block 67, the bar rod 68 and the arc rod.

Detailed Description

As shown in fig. 1, 2, 3 and 4, the device for automatically reading the liquid level position during verification of the common glass measuring device comprises a workbench, wherein four vertical electric push rods a55 are arranged below the workbench 40, the lower ends of the four electric push rods a55 are all fixed on the ground through anchor bolts, and the telescopic ends a54 of the four electric push rods a55 are vertically upward and are respectively hinged with four corners of the lower end face of the workbench 40 through spherical hinges 53.

Four vertical electric push rods B1 are fixed on the ground around the workbench 40 through anchor bolts, the end of a telescopic end B2 of each vertical electric push rod B1 is fixedly connected with a flange B3, the end of the flange B3 is fixedly provided with a vertical shaft servo motor C5, the end of a vertical shaft C11 of each vertical shaft servo motor C5 is fixedly connected with a flange C6, the end of a flange C6 is fixedly connected with a horizontal shaft servo motor D7, a fixing sleeve D8 is arranged on a horizontal shaft D10 of the horizontal shaft servo motor D7 through keys, a camera A9 is fixed in the fixing sleeve D8, and the camera A9 is a CMOS camera provided with a CMOS image sensor.

A vertical electric push rod E12 is further arranged on the ground behind the workbench 40 through anchor bolts, the end part of the telescopic end E14 of the vertical electric push rod E12 is fixedly connected with a flange E15, the end part of the flange E15 is fixedly connected with a vertical shaft servo motor F16, the end part of the vertical shaft F17 of the vertical shaft servo motor F16 is fixedly connected with a flange F18, the end part of the flange F18 is fixedly connected with a fixing sleeve G19, the upper end face of the fixing sleeve G19 is welded and connected with a standard liquid containing bottle fixing frame 21, a standard liquid containing bottle 22 is placed in the standard liquid containing bottle fixing frame 21, a bottle stopper electromagnetic valve 24 is arranged at the bottle opening 23 of the standard liquid containing bottle 22, an air-permeable dustproof filter screen 25 is fixedly arranged at the end part of the bottle stopper electromagnetic valve 24, a liquid outlet electromagnetic valve 26 is fixedly arranged at the lower part of the standard liquid containing bottle 22, the liquid, the metering pump 64 is fixed to the lower end face of the flange J37.

A horizontal electric push rod G20 is fixed in a fixing sleeve G19, a flange plate H29 is fixedly connected to the end portion of a telescopic end G28 of the horizontal electric push rod G20, a horizontal shaft servo motor I33 is fixed to the right end of the flange plate H29, a flange plate I32 is fixed to the end portion of a horizontal shaft I62 of the horizontal shaft servo motor I33, a fixing sleeve J31 is fixed to the flange plate I32, a vertical electric push rod J30 is fixed in the fixing sleeve J31, a flange plate J37 is fixed to the end portion of the telescopic end J34 of the vertical electric push rod J30, a fixing sleeve K35 is installed on the right side of the upper end face of the flange plate J37 through bolts, a vertically downward shooting camera B36 is installed in the fixing sleeve K35, and the camera B58.

This application is when need to wait to examine and determine sample A or B annotate liquid, liquid outlet solenoid valve 26 and bottle plug solenoid valve 24 on the standard liquid holding bottle 22 can open simultaneously under the control that shows PLC controller 4, at this moment, because atmospheric pressure reason can make the standard liquid can smoothly flow through liquid outlet solenoid valve 26, spiral extension tube 27, measuring pump 64, liquid feeding pipe 38 reach and wait to examine and determine sample A or B in, and when bottle plug solenoid valve 24 opened, the setting of ventilative dustproof filter screen 25 can prevent effectively again that the dust in the air from getting into in the standard liquid holding bottle 22.

An electronic balance A13 is fixed on the left side of the workbench 40, a sample A39 to be detected is placed on the electronic balance A13, the sample A39 to be detected is a glass measuring device such as a measuring flask, a measuring cylinder or a measuring cup, the sample A39 to be detected in the embodiment is a measuring flask, a vertical axis servo motor L52 is fixed at the right rear corner of the upper end face of the workbench 40 through a bolt, a flange plate L50 is fixed at the end part of a vertical axis L51 of the vertical axis servo motor L52, a vertical electric push rod M49 is fixed at the end part of the flange plate L50, a connecting sleeve M47 is fixed at the upper part of a telescopic end M46 of the vertical electric push rod M49 through a bolt, an electric clamping jaw 45 is fixed on the connecting sleeve M47, the electric clamping jaw 45 in the application is the prior art, two clamping fingers 65 of the electric clamping jaw 45 are respectively connected with a clamping piece, the clamping piece comprises a connecting block 66 fixedly connected with the clamping fingers 65 and two, each clamping rod consists of a strip-shaped rod 67, an arc rod 68 and an extension straight rod 43 which are connected in sequence, wherein the strip-shaped rod 67 is fixedly connected with the connecting block 66, and the inner side surface of any clamping rod is also provided with an elastic wear-resistant layer; in addition, in the application, a fixed sleeve M42 is further fixed on the outer side surface of the lower clamping rod in the front two clamping rods, a camera C48 which vertically shoots downwards is fixed in the fixed sleeve M42, and the camera C48 is a CMOS camera provided with a CMOS image sensor.

The setting of electronic clamping jaw 45 makes the buret or this kind of straw of multiple diameter of centre gripping and shape of symmetry circular arc department between two holders wait to examine test sample B44 in this application, waits to examine test sample B44 for acid buret in this application, and flexible end M46 extension or shorten the adaptable installation different length wait to examine test sample B44.

When the vertical axis servo motor L52 works, the sample B44 to be detected clamped by the arc rods of the two clamping pieces can rotate by taking the vertical central line of the vertical axis L51 as the center of a circle, when the lower end of a sample B44 to be detected passes through a through hole 63 in the center line of the workbench 40, the liquid in the sample B44 to be detected can fall into a measuring cylinder 57 right below the through hole 63 through the through hole 63, the measuring cylinder 57 is placed on an electronic balance B56, the electronic balance B56 is placed on the horizontal ground, the electronic balance B56 can measure the mass of the measuring cylinder 57 and the liquid in the measuring cylinder 57, scale marks are arranged on the measuring cylinder 57, a camera D58 carries out image acquisition on the lowest point of a liquid level recess in the measuring cylinder 57 and the position of the scale marks, a camera D58 is a CMOS camera provided with a CMOS image sensor, the camera D58 is fixed in a fixing sleeve N61, the fixing sleeve N61 is fixedly connected with the lower end of a telescopic end N60 of a vertical electric push rod N59, and the vertical electric push rod N59 is fixed on the lower surface of the workbench 40 through bolts.

The camera B36, the camera C48, the camera D58, the four cameras A9, the electronic balance A13 and the electronic balance B56 are all connected with the input end of the display PLC controller 4 through electric control wires, the four vertical electric push rods A55, the four vertical electric push rods B1, the four vertical axis servo motors C5, the four horizontal axis servo motors D7, the vertical electric push rods E12, the vertical axis servo motor F16, the horizontal electric push rod G20, the horizontal axis servo motor I33, the vertical electric push rod J30, the metering pump 64, the liquid outlet electromagnetic valve 26, the bottle stopper electromagnetic valve 24, the vertical axis servo motor L52, the vertical electric push rod M49, the electric clamping jaw 45 and the vertical electric push rod N59 are all connected with the output end of the display PLC controller 4 through electric control wires; in the application, various automatic liquid level reading and scale position reading control programs and image analysis and judgment software for glass measuring instrument verification are input into the PLC 4, the PLC 4 is displayed, an operation page can be connected with a computer, a mouse is used for clicking scales on a sample picture image of a glass measuring instrument to be verified on the computer, a set scale value color is provided with a special mark, the PLC 4 is displayed, relevant control is carried out according to a calibrated scale according to rules, and the set scale and the lowest point difference value of the liquid level concave position are automatically read.

In the above examples, the sample A39 to be measured was a measuring flask, and the sample B44 to be measured was an acid burette.

The working principle of this application does: when the measuring flask needs to be checked, a worker can firstly place a cleaned and dried sample of the measuring flask to be checked on the electronic balance A13 on the workbench 40, and then press a calibration start button for the sample A to be checked in the PLC 4;

the electronic balance A13 sends the quality data of the measuring flask sample weighed by the electronic balance A13 to the display PLC controller 4, and the display PLC controller 4 records the quality data of the measuring flask sample according to the programming, because the mass of the glass measuring apparatus on the market is very different, therefore, to detect whether the horizontal scale marks on the measuring flask sample are perpendicular to the vertical axis center line of the measuring flask sample, the cameras a9 around the workbench 40 transmit the image conditions of the horizontal scale marks on the measuring flask sample and the vertical axis center line position of the measuring flask to the display PLC controller 4, the display PLC controller 4 makes a judgment according to the image data transmitted by the four cameras a9, the vertical electric push rods A55 at the four corners below the workbench 40 are controlled to work, so that the telescopic end A54 is slightly extended or shortened, the spherical hinge 53 above the telescopic end A54 synchronously rotates, and finally the images of the horizontal scale marks on the bottle to be detected and the position of the vertical axis center line of the bottle to be detected meet the requirements of programming regulation;

then, the display PLC controller 4 controls the vertical electric push rod G12, the vertical axis servo motor F16, the horizontal electric push rod G20, the horizontal axis servo motor I33 and the vertical electric push rod J30 to work, so that a liquid outlet at the lower end of the liquid feeding pipe 38 moves close to and aligns with an upper opening of a measuring flask sample placed on the electronic balance A13, the moving distance of the telescopic end of each electric push rod and the rotating angle of a shaft of the vertical axis servo motor and the shaft of the horizontal axis servo motor are displayed, and the display PLC controller 4 automatically records and calculates; meanwhile, the display PLC controller 4 can also control the work of a related electric push rod and a servo motor according to the image data provided by the camera B36 and the program to ensure that a liquid outlet at the lower end of the liquid feeding pipe moves close to and is aligned with the upper opening of the sample in the measuring flask;

and then, the display PLC controller 4 respectively fills a specified amount of standard liquid according to the calibration steps related to the measuring flask sample set by programming, wherein the mode that the display PLC controller 4 controls the filling unit to fill the standard liquid with specified mass into the measuring flask sample is as follows: the PLC 4 is displayed to control the liquid outlet electromagnetic valve 26 and the bottle stopper electromagnetic valve 24 to be opened simultaneously, standard liquid in the standard liquid holding bottle 22 enters the liquid adding pipe 38 through the liquid outlet electromagnetic valve 26, the spiral extension pipe 27 and the metering pump 64, the metering pump 64 meters and discharges the standard liquid with set quality according to programming, and the standard liquid falls into a measuring bottle sample through a lower end outlet of the liquid adding pipe 38;

then, the PLC 4 controls the vertical electric push rod B1 around the workbench 40 and the vertical axis servo motor C5 and the horizontal axis servo motor D7 above the telescopic end B2 to work, so that the four cameras A9 horizontally align to the measuring flask sample from four directions, and the PLC 4 is displayed to judge whether the liquid level of the standard liquid in the measuring flask sample is stable or not according to the image data sent by the cameras A9;

when the display PLC controller 4 judges that the standard liquid surface is stable, the display PLC controller 4 controls the vertical electric push rod B1, the vertical axis servo motor C5 and the horizontal axis servo motor D7 to work, so that the four cameras A9 horizontally align to the scales of the measuring flask sample from four directions and send the image data of the lowest point of the liquid level recess in the measuring flask sample and the position of the calibrated scale to the display PLC controller 4, and the display PLC controller 4 performs amplification processing calculation according to the position images sent by the four cameras A9 to make judgment and record; meanwhile, the display PLC 4 also records the total weight and mass conditions of the liquid-added measuring flask sample weighed by the electronic balance A13;

then, the display PLC 4 controls the liquid adding unit to inject standard liquid with specified quality into the sample of the measuring flask again; when the PLC 4 judges that the liquid level of the standard liquid in the measuring flask sample is stable, the display PLC 4 controls the vertical electric push rod B1 and the vertical axis servo motor C5 and the horizontal axis servo motor D7 above the telescopic end B2 to work again, the four cameras A9 are made to ascend and horizontally align to the scales of the measuring flask sample, the image data of the lowest point of the liquid level recess in the measuring flask sample and the position of the calibration scales are sent to the display PLC 4, the display PLC 4 performs amplification processing calculation according to the position images sent by the four cameras A9 to make judgment and record, meanwhile, the display PLC 4 also records the total weight and mass conditions of the measuring flask sample weighed by the electronic balance A13 after liquid is added again at the moment, and the display PLC 4 automatically gives the verification conclusion of the measuring flask sample when all the set scales are verified.

And when the sample B44 to be detected needs to be detected, the worker can place the sample B44 to be detected at the symmetrical circular arc between the two clamping rods, and details the detection principle of the sample B44 to be detected as an acid burette as an example:

a worker A holds an acid burette sample to be calibrated to enable the acid burette to be vertically positioned between the arc rods on the two clamping pieces, and then a worker B presses a calibration start button of the sample B to be calibrated in the display PLC 4;

then, the PLC 4 is displayed to control the electric clamping jaw 45 to work, the electric clamping jaw 45 controls the two clamping pieces to relatively approach, and the arc rods on the two clamping pieces stably clamp the acid burette;

then, the display PLC controller 4 controls a vertical axis servo motor L52 and a vertical electric push rod M49 to work, the vertical axis servo motor L52 works to enable the acid burette sample to rotate by taking the axis vertical center line of a vertical axis L51 as the center line, when the lower end of the acid burette sample reaches the center of a through hole 63 on a workbench 40, the lower end stops, a camera C48 of the acid burette sample observes the length of the acid burette sample in the rotating process, the vertical axis servo motor L52 rotates according to the preset angle of the display PLC controller 4 and a telescopic end M46 of a vertical electric push rod M49 rises or falls according to the preset distance value of the display PLC controller 4, and the acid burette sample can be accurately moved to the center of the through hole 63;

the cameras A9 around the workbench 40 send the horizontal scale marks and vertical line position images on the acid burette sample to the display PLC controller 4, the display PLC controller 4 makes a judgment according to the image data transmitted by the four cameras A9 and controls the vertical electric push rods A55 at the four corners below the workbench 40 to work so that the telescopic end A54 is slightly extended or shortened, the spherical hinge 53 above the telescopic end A54 synchronously rotates, and finally the horizontal scale marks and the vertical line position images on the acid burette sample meet the requirements of programming regulation;

then, the display PLC 4 controls the liquid feeding pipe 38 to move to the position right above the acid burette sample, and the control principle that the display PLC 4 controls the liquid feeding pipe 38 to move to the position right above the acid burette sample is consistent with the principle that the liquid feeding pipe moves to the position above the measuring flask;

then, the PLC 4 is displayed to control the liquid adding unit to add a preset standard liquid with specified quality into the acid burette sample, and the working principle of adding liquid into the acid burette by the liquid adding unit is the same as that of the liquid adding unit;

then, the PLC 4 controls the vertical electric push rod B1 around the workbench 40 and the vertical axis servo motor C5 and the horizontal axis servo motor D7 above the telescopic end B2 to work, so that the four cameras A9 horizontally align to the acid burette sample from four directions, and the PLC 4 is displayed to judge whether the liquid level of the standard liquid in the acid burette sample is stable according to the image data sent by the cameras A9;

when the display PLC controller 4 judges that the surface of the standard liquid in the acid burette sample is stable, the display PLC controller 4 controls the vertical electric push rod B1, the vertical axis servo motor C5 and the horizontal axis servo motor D7 to work, so that the four cameras A9 horizontally align to the scales of the acid burette sample from four directions and send the image data of the lowest point of the liquid level recess and the calibrated scale position to the display PLC controller 4, and the display PLC controller 4 performs amplification processing calculation and makes judgment and record according to the position image sent by the four cameras A9;

then, a worker rotates a cock on the acid burette forward to enable the standard liquid to flow out from an outlet at the lower end of the acid burette and enter the measuring cylinder 57 through the through hole 63, when the liquid level in the acid burette sample is about to reach a specified scale value, the worker rotates the cock on the acid burette backward to enable the standard liquid to stop flowing out downwards, the display PLC controller 4 performs amplification processing calculation according to the position image sent by the four cameras A9, meanwhile, the electronic balance B56 weighs the measuring cylinder 57 and the weight of the liquid, the camera D58 performs image data acquisition on the lowest point of the liquid level recess in the measuring cylinder 57 and the scale line position on the measuring cylinder 57 and feeds the acquired image data back to the display PLC controller 4, the display PLC controller 4 controls the vertical electric push rod N59 to work according to the image data fed back by the camera D58 to enable the height of the camera D58 to be on the same plane with the liquid level in the measuring cylinder 57, the camera D58 transmits the image data of the lowest point of the liquid level recess and the closest position of the graduation line to the display PLC controller 4.

The calibration personnel repeats the operation of rotating the acid burette cock forwards and reversely to enable the liquid level in the acid burette sample to gradually drop to the calibration related volume scales, and the PLC 4 is displayed to comprehensively calculate the calibration conclusion of the acid burette sample to be calibrated according to the image of the calibration related volume scales, which is sent by the four cameras A9 and to which the liquid level in the acid burette sample gradually drops, the liquid weight in each incremental measuring cylinder 57 weighed by the electronic balance B56 and the image data of the liquid level in each measuring cylinder 57 and the closest scale mark sent by the camera D58.

The device has realized that glass measurement ware verification process commonly used reads liquid level concave minimum point and scale mark position automatically, realizes waiting to examine the glass measurement ware automatic leveling or perpendicular, automatic weighing, automatic liquid feeding furthest eliminates artificial interference factor, improves examination calibration quality and efficiency, promotes the automation.

Claims (10)

1. The utility model provides a glass volume meter is examined and is read liquid level and scale position device voluntarily which characterized in that: the electronic balance comprises a workbench, wherein an electronic balance A and a fixing device are fixedly arranged on the workbench, the fixing device comprises a clamping part and a supporting part capable of adjusting the position of the clamping part, the clamping part and the supporting part are fixedly connected through a connecting sleeve M, and a camera C is arranged on the clamping part;

a worktable surface micro-adjusting device and a measuring cylinder image acquisition device are fixedly arranged on the lower end surface of the worktable; the lower end of the worktable surface degree micro-adjustment device is fixed on the ground, and the measuring cylinder image acquisition device comprises a camera D and a camera D adjustment unit; the workbench is also provided with a through hole, a measuring cylinder is arranged below the through hole, the measuring cylinder is placed on an electronic balance B, and the electronic balance B is fixed on the ground;

the periphery of the workbench is also provided with an image acquisition device for a sample A to be detected respectively, and the image acquisition device for the sample A to be detected comprises a camera A and a camera A adjusting unit;

a liquid adding device is arranged behind the workbench and comprises a liquid adding unit and a liquid adding unit adjusting part, and the liquid adding unit adjusting part is fixedly connected with a camera B;

the electronic balance A, the electronic balance B, the camera C, the camera D and the four cameras A are all electrically connected with the input end of the display PLC controller, and the clamping part, the supporting part, the workbench surface micro-adjusting device, the camera D adjusting unit, the camera A adjusting unit and the liquid adding unit adjusting part are all electrically connected with the output end of the display PLC controller.

2. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the clamping part comprises an electric clamping jaw, two clamping fingers of the electric clamping jaw are respectively connected with a clamping piece, the clamping piece comprises a connecting block fixedly connected with the clamping fingers and two clamping rods fixedly connected with the connecting block, the two clamping rods are arranged in parallel, each clamping rod consists of a strip-shaped rod, an arc rod and an extending straight rod which are sequentially connected, the strip-shaped rod is fixedly connected with the connecting block, and an arc-shaped groove formed between the two clamping pieces is used for clamping a sample B to be detected; the electric clamping jaw is electrically connected with the output end of the controller.

3. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the supporting part comprises a vertical shaft servo motor L fixed on the workbench, the upper end of a vertical shaft L of the vertical shaft servo motor L is fixedly connected with a vertical electric push rod M, and the upper part of a telescopic end M of the vertical electric push rod M is fixedly connected with the electric clamping jaw through a connecting sleeve; and the vertical shaft servo motor L and the vertical electric push rod M are electrically connected with the output end of the display PLC controller.

4. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the workbench surface micro-adjustment device comprises a vertical electric push rod A fixed on the ground, and the vertical electric push rod A is hinged with the lower end surface of the workbench through a spherical hinge; and the vertical electric push rod A is electrically connected with the output end of the display PLC controller.

5. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the camera D adjusting unit comprises a fixing sleeve N for fixing the camera D, and the fixing sleeve N is fixedly connected with the telescopic end N of the vertical electric push rod N; and the vertical electric push rod N is electrically connected with the output end of the display PLC controller.

6. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the camera A adjusting unit comprises a vertical electric push rod B fixed on the ground, a vertical shaft servo motor C is fixedly connected to the telescopic end B of the vertical electric push rod B, a vertical shaft C of the vertical shaft servo motor C is fixedly connected with a horizontal shaft servo motor D, a fixed sleeve D is fixedly arranged on a horizontal shaft D of the horizontal shaft servo motor D, and a camera A is fixed in the fixed sleeve D; and the vertical electric push rod B, the vertical shaft servo motor C and the horizontal shaft servo motor D are electrically connected with the output end of the display PLC controller.

7. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 1, wherein: the liquid adding unit comprises a standard liquid containing bottle, the standard liquid containing bottle is connected with a metering pump through a spiral telescopic pipe, and the metering pump is fixedly connected with a liquid adding pipe; and the metering pump is electrically connected with the output end of the display PLC controller.

8. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 7, wherein: the standard liquid containing bottle is further provided with a dustproof unit, the dustproof unit comprises a liquid outlet electromagnetic valve connected with a water outlet at the lower part of the standard liquid containing bottle, the liquid outlet electromagnetic valve is connected with the spiral telescopic pipe, a bottle stopper electromagnetic valve is further arranged at the bottle opening of the standard liquid containing bottle, and a breathable dustproof filter screen is further fixedly arranged at an air inlet at the end part of the bottle stopper electromagnetic valve; the liquid outlet electromagnetic valve and the bottle stopper electromagnetic valve are electrically connected with the output end of the display PLC controller.

9. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 8, wherein: the liquid adding unit adjusting part comprises a standard liquid containing bottle adjusting unit and a liquid adding pipe adjusting unit; the standard liquid containing bottle adjusting unit comprises a vertical electric push rod E fixed on the ground, the upper end of a telescopic end E of the vertical electric push rod E is fixedly connected with a vertical shaft servo motor F, a vertical shaft F of the vertical shaft servo motor F is fixedly connected with a fixing sleeve G, the upper end of the fixing sleeve G is fixedly provided with a fixing frame, and the standard liquid containing bottle is placed in the fixing frame; and the vertical electric push rod E and the vertical shaft servo motor F are electrically connected with the output end of the display PLC.

10. The apparatus for automatic reading of liquid level and scale position for verification of common glass gauges as claimed in claim 9, wherein: the liquid feeding pipe adjusting unit comprises a horizontal electric push rod G fixed in a fixed sleeve G, the end part of a telescopic end G of the horizontal electric push rod G is fixedly connected with a horizontal shaft servo motor I, the end part of a horizontal shaft I of the horizontal shaft servo motor I is fixedly connected with a fixed sleeve J, a vertical electric push rod J is fixedly connected in the fixed sleeve J, the end part of the telescopic end J of the vertical electric push rod J is fixedly connected with a flange plate J, the right side of the upper end surface of the flange plate J is fixedly connected with a fixed sleeve K, and a camera B which shoots vertically downwards is fixedly connected in the fixed sleeve K; the metering pump is fixed on the lower end face of the flange plate J; and the horizontal electric push rod G, the horizontal shaft servo motor I and the vertical electric push rod J are electrically connected with the output end of the display PLC controller.

Images