CN111829641A - Electronic platform scale calibrating device and calibrating method - Google Patents
Electronic platform scale calibrating device and calibrating method Download PDFInfo
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- CN111829641A CN111829641A CN202010854193.2A CN202010854193A CN111829641A CN 111829641 A CN111829641 A CN 111829641A CN 202010854193 A CN202010854193 A CN 202010854193A CN 111829641 A CN111829641 A CN 111829641A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
- G01G23/012—Testing or calibrating of weighing apparatus with load cells comprising in-build calibration weights
Abstract
The invention provides a calibrating device and a calibrating method for an electronic platform scale, wherein the calibrating device comprises an automatic measurement control device, an automatic weight loading and unloading device, an automatic weight sensing weight loading and unloading device and an automatic shifting control device, the automatic weight loading and unloading device is a weight reverse loading device, a middle supporting plate of the automatic shifting control device can move left and right, an upper supporting plate can move front and back, and the electronic platform scale to be calibrated is arranged above the upper supporting plate; the computer of the automatic measurement control device can collect and display the weight loading value and the actual weighing value. The automatic measurement control device, the automatic weight loading and unloading device and the automatic shift control device are arranged in the automatic measurement control device, 5 verification points of the electronic table scale to be verified can be automatically moved to the position below the pressure head, then the automatic weight loading and unloading device is used for realizing the weight loading and unloading of each verification point, the weight loading value and the actual scale value of each verification point are stored and calculated in the computer, and the measurement error of the electronic table scale to be verified is judged.
Description
Technical Field
The invention relates to the field of metering and weighing, in particular to a calibrating device and a calibrating method for an electronic platform scale.
Background
The digital indicating scale mainly has four types of electronic counter scale, electronic platform scale, electronic hanging scale and fixed electronic scale, and electronic counter scale and electronic platform scale are collectively called electronic platform scale, include: price scales, weight scales, bar code scales, counting scales, multi-scale scales, multi-range scales, and the like; the electronic hanging scale includes: hook head scale, hook hanger scale, overhead crane scale, single track scale, etc.; fixed electronic scale includes: electronic weighbridge, electronic ground weighbridge, electronic hopper scale and the like.
The jjjg 539-: the accuracy grade of the scale is related to the calibration index value, the calibration index number and the minimum weighing as shown in table 1.
TABLE 1 relationship of accuracy grade to calibration index, calibration index and minimum scale
The calibration of the electronic scale is mainly to calibrate the no-load, the minimum weighing, the maximum allowable error, the one-third maximum weighing and the like of the electronic scale through standard weights according to the precision grade, the calibration division value, the calibration division number, the maximum weighing and the minimum weighing of the electronic scale. Weights with different specifications are needed in the whole verification and calibration process.
At present when electronic platform balance examination calibration, all be the manual work put the weight on the loader, in the calibration process is examined and determine to the electronic scale in batches, will repeatedly carry out loading and the uninstallation of standard weight, this is very big manpower consumption, the operation process is also great to the accuracy influence of standard weight simultaneously, when examining and determining the calibration to the electronic scale of wide range very much, the loading and the uninstallation of big mass weight will bring great trouble to examining and determining the calibration process, the efficiency of examining and determining has seriously reduced simultaneously, the accuracy influence of artificial operation to standard weight is also great.
Disclosure of Invention
The invention aims to provide the electronic platform scale calibrating device and the calibrating method, which can automatically load and unload weights, save manpower and reduce the influence of manual operation on the accuracy of standard weights.
In order to solve the technical problems, an embodiment of the invention provides an electronic platform scale calibrating device, which comprises a rack, an automatic measurement control device, an automatic weight loading and unloading device, an automatic sensing weight loading and unloading device and an automatic shifting control device, wherein the rack comprises a bottom plate, a middle plate and a top plate which are sequentially and relatively fixedly arranged from bottom to top;
the automatic weight loading and unloading device is a weight reverse loading device and comprises weight strings, weight string supporting plates, a weight driving device, a weight hoisting frame and a weight hoisting motor, wherein the weight strings are arranged above the weight string supporting plates, the weight supporting plates move up and down under the driving action of the weight driving device, the upper ends of the weight strings are connected with the weight hoisting frame, the weight applied to the weight hoisting frame is increased by one step when one section of the weight string is lowered down by the weight supporting plates, and the upper ends of the weight hoisting frame extend to the upper part of the middle plate;
the automatic shifting control device comprises a lower supporting plate, a middle supporting plate and an upper supporting plate, wherein the lower supporting plate, the middle supporting plate and the upper supporting plate are sequentially arranged above the middle plate in parallel from bottom to top;
the upper end of the weight hoisting frame is provided with a pressure head, the pressure head is suspended above a loader of the electronic table scale to be detected through a weight hoisting motor, and the weight hoisting motor is arranged on the top plate;
the automatic loading and unloading device for the sensing weight comprises a sensing weight string and a sensing weight loading motor, wherein the sensing weight loading motor is installed on a top plate, and the sensing weight string is suspended above a bearing device of the electronic counter scale to be detected through the sensing weight loading motor;
the automatic measurement control device comprises a computer, the computer is connected with each driving motor through a data line, and a weight loading value and an actual weighing value can be displayed on a display screen of the computer.
The electronic platform scale calibrating device further comprises an automatic imaging identification device, the automatic imaging identification device comprises a camera installed on the frame, the camera is connected with a computer through a data transmission line, a picture identification module is arranged in the computer, and an actual weighing value picture shot by the camera is displayed on a display screen after being identified by the picture identification module.
The weight string comprises an inner string weight and an outer string weight which are sleeved, the weight string supporting plate comprises an outer string weight supporting plate and an inner string weight supporting plate which are arranged at an upper interval and a lower interval, the weight driving device comprises an inner string weight driving device and an outer string weight driving device, the inner string weight is arranged on the inner string weight supporting plate, the inner string weight supporting plate moves up and down under the driving action of the inner string weight driving device, and the outer string weight supporting plate moves up and down under the driving action of the outer string weight driving device.
Furthermore, the weight string comprises a plurality of stacked weight pieces, and every two adjacent weight pieces are connected through hanging nails.
And scales are arranged at the transverse edges and the longitudinal edges of the upper supporting plate and are used for determining the transverse and longitudinal dimensions of the loader.
Wherein, electronic table case balance calibrating installation still include automatic balancing unit, including four leveling feet, one of them angle of mounting plate is the origin angle, be equipped with 4 recesses that lie in quadrangle four corners department on the mounting plate, one of them recess lies in origin angle department, four leveling foot one-to-one lies in four recesses, leveling foot is including leveling board and leveling motor, the leveling motor is installed in the recess tank bottom, leveling board level place and with the motor shaft fixed connection of leveling motor, wait to determine the four corners one-to-one of electronic table case balance and arrange in on four leveling boards.
The electronic platform scale calibrating device further comprises a surface height scanner, the surface height scanner comprises a laser ranging sensor and a sensor driving device, and the laser ranging sensor is arranged on the top plate and reciprocates back and forth and left and right above the electronic platform scale to be calibrated under the driving action of the sensor driving device;
the laser ranging sensor detects the distance between each corner end of the electronic platform scale carrier and the laser ranging sensor in real time to generate a distance electric signal, the surface height scanner is electrically connected with the computer and transmits the generated distance electric signal into the computer, a signal identification module is arranged in the computer and calculates the height difference of each corner end of the electronic platform scale carrier after identifying the distance electric signal, the computer is electrically connected with the leveling motors of the automatic balancing device, and the leveling motor or motors are determined to be started according to the height difference calculated above to adjust the electronic platform scale carrier to the level;
the structure of the surface height scanner is as follows: a front guide rail and a rear guide rail are respectively arranged below the left side and the right side of the top plate, a left guide rail extending rightwards is respectively connected below the front end and the rear end of the front guide rail and the rear end of the left side in a sliding manner, a right guide rail extending leftwards is respectively connected below the front end and the rear end of the front guide rail and the rear end of the right side in a sliding manner, and a gap between the left guide rail and the right guide rail at the front side and a gap between the left guide rail and the right guide rail at the rear side enable a weight hoisting motor, an inductance weight loading; the lower parts of the left and right guide rails on the front side and the left and right guide rails on the rear side are respectively connected with a laser ranging sensor in a sliding way;
the two left guide rails and the right guide rails respectively slide along the front guide rail and the rear guide rail in a reciprocating manner by the respective guide rail driving motors, and the 4 laser ranging sensors respectively slide along the left guide rail and the right guide rail in a reciprocating manner by the respective sensor driving motors;
and each corner end of the electronic platform scale carrier is provided with a target object block which can be identified by the laser ranging sensor, and the distance between the target object block and the laser ranging sensor is the distance between each corner end of the electronic platform scale carrier and the laser ranging sensor.
The electronic platform scale calibrating device further comprises a loader surface scanner electrically connected with the computer, wherein the loader surface scanner comprises infrared sensors, and the infrared sensors collect signals of four corner positions of the loader and transmit the signals to the computer through data transmission lines for storage and calculation.
The invention also provides a calibration method using the electronic platform scale calibration device, which comprises the following steps:
(1) moving the lower supporting plate to a proper height, and then returning the middle supporting plate and the upper supporting plate to the original positions;
(2) the electronic platform scale to be detected is placed on the upper supporting plate, and one corner of the electronic platform scale to be detected is placed at the origin angle of the upper supporting plate;
(3) manually or automatically adjusting the balance of a loader of the electronic platform scale to be detected;
(4) determining the transverse and longitudinal dimensions of the electronic table scale to be detected by using a scale at the edge of the upper supporting plate, inputting the transverse and longitudinal dimensions into a computer, automatically calculating the central dimension of the electronic table scale to be detected by the computer, electrifying a driving motor of the automatic shifting control device, and driving the middle supporting plate and the upper supporting plate to move to the position where the center of the electronic table scale to be detected is positioned below a pressure head of the weight hoisting frame by the automatic shifting control device;
(5) the computer is electrified for a weight hoisting motor, the weight hoisting frame is lowered, a pressure head falls on a loader of the electronic platform scale to be detected, then the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point of the loader of the electronic platform scale to be detected are detected according to a detection process card, an automatic shift control device is used for switching among the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point in the detection process, an automatic weight loading and unloading device is used for completing the automatic weight loading and unloading of 5 detection points, the computer records the weight loading value and the actual scale value, and an automatic sensing weight loading and unloading device is used for dropping the sensing weight on the loader of the electronic platform scale to be detected when the 5 detection points are switched, ensuring that the electronic platform scale to be detected is not empty;
(6) after the verification is finished, the automatic weight loading and unloading device and the automatic weight loading and unloading device return;
(7) and taking down the electronic platform scale to be detected from the upper supporting plate, and driving the lower supporting plate, the middle supporting plate and the upper supporting plate to respectively return to the original positions by the automatic shift control device to wait for the next detection.
In the step (3), the balance of the loader of the electronic platform scale to be detected is automatically adjusted by using the surface height scanner and the automatic balance adjusting device, and the method comprises the following specific steps:
(3-1) determining the height dimensions of the transverse and longitudinal edges of the load carrier, in particular the height dimensions of the four corners of the load carrier by using a surface height scanner;
and (3-2) the surface height scanner transmits the electric signal corresponding to the height dimension into the computer, the computer judges the balance degree of the loader according to the height dimension, and then the balance of the loader of the electronic platform scale to be detected is automatically adjusted by using the automatic balance adjusting device.
The technical scheme of the invention has the following beneficial effects:
1. the automatic measurement control device, the automatic weight loading and unloading device and the automatic shift control device are arranged in the automatic measurement control device, 5 verification points of the electronic table scale to be verified can be automatically moved to the position below the pressure head, then the automatic weight loading and unloading device is used for realizing the weight loading and unloading of each verification point, the weight loading value and the actual scale value of each verification point are stored and calculated in the computer, and the measurement error of the electronic table scale to be verified is judged.
2. The automatic balance adjusting device is arranged in the invention, and the loader can be adjusted to be balanced before verification.
3. The invention is provided with a surface scanner of the loader, automatically obtains the position signals of four corners of the loader, the computer can automatically calculate the X-direction and Y-direction sizes between the center of the loader and the pressure head according to the positions of the four corners, and then the computer is electrified for the motor of the automatic shift control device to drive the center of the loader to the lower part of the pressure head.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of an automatic weight loading and unloading device according to an embodiment;
FIG. 3 is a schematic structural diagram of an automatic shift control apparatus according to an embodiment;
FIG. 4 is a top view of an automatic balancing apparatus according to a second embodiment of the present invention;
FIG. 5 is an enlarged view of a cross-sectional view of one of the automatic balancing apparatuses according to the second embodiment;
FIG. 6 is an electrical schematic diagram of the connection of the computer to the drive motors of the present invention;
FIG. 7 is an enlarged view of the structure of the case of the present invention;
FIG. 8 is an enlarged view of the structure of the weight hoisting frame in the invention;
FIG. 9 is an enlarged view of the weight string according to the present invention;
FIG. 10 is an enlarged view of the weight driving device according to the present invention;
FIG. 11 is an enlarged view of the structure of the support plate of the weight string in the present invention;
FIG. 12 is an enlarged view of the construction of the weight string of the sensory weight of the present invention;
FIG. 13 is an enlarged view of the automatic loading and unloading device of the sensing weight of the present invention;
FIG. 14 is an enlarged view of the upper plate according to the present invention;
fig. 15 is a schematic structural diagram of a second mid-height scanner according to the embodiment of the present invention.
Description of reference numerals:
1. a frame; 11. a base plate; 12. a middle plate; 13. a top plate; 2. an automatic measurement control device; 3. a weight automatic loading and unloading device; 31. a weight string; 311. hanging nails; 32. a weight string supporting plate; 33. a weight driving device; 331. a weight driving motor; 332. a sprocket drive mechanism; 3321. a driven sprocket; 3322. a chain; 3323. a tension sprocket; 3324. a drive sprocket; 333. the weight drives the screw rod; 334. a lower support pillar; 335. a connecting plate; 336. a weight driving nut; 34. a weight hoisting frame; 35. a weight hoisting motor; 36. a pressure head; 4. the automatic loading and unloading device for the sensing weight; 41. a sensory weight string; 42. a sensing weight loading motor; 5. an automatic shift control device; 51. a lower supporting plate; 52. a middle supporting plate; 53. an upper supporting plate; 531. a scale; 532. an L-shaped limit card; 533. a groove; 6. an electronic platform scale to be detected; 7. an imaging automatic recognition device; 8. leveling feet; 81. leveling; 82. a leveling motor; 91. a front and rear guide rail; 92. a left guide rail; 93. a right guide rail; 94. laser rangefinder sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1, an electronic platform scale calibrating apparatus comprises a rack 1, an automatic measurement control device 2, an automatic weight loading and unloading device 3, an automatic sensing weight loading and unloading device 4 and an automatic shift control device 5, wherein the rack 1 comprises a bottom plate 11, a middle plate 12 and a top plate 13 which are sequentially and relatively fixedly arranged from bottom to top, and a box body is enclosed between the bottom plate 11 and the middle plate 12 through an aluminum alloy frame, two side plates, a front door and a rear door, as shown in fig. 7.
As shown in fig. 2, the automatic weight loading and unloading device 3 is a weight reverse loading device, and is disposed in the above-mentioned enclosed box, and includes a weight string 31, a weight string support plate 32, a weight driving device 33, a weight lifting frame 34 (shown in fig. 8), and a weight lifting motor 35, wherein the weight string 31 is disposed above the weight string support plate 32, the weight support plate 32 moves up and down under the driving action of the weight driving device 33, the upper end of the weight string 31 is connected to the weight lifting frame 34, the weight applied to the weight lifting frame 34 by the weight string 31 when the weight support plate 32 descends one section, and the upper end of the weight lifting frame 34 extends to the upper side of the middle plate 12 after penetrating through the middle plate 12.
In this embodiment, the weight string 31 includes an inner string of weights and an outer string of weights (as shown in fig. 9), the weight string 31 includes a plurality of stacked weight pieces, each two adjacent weight pieces are connected by a hanging nail 311, when the weight pieces are stacked together, the hanging nail 311 is disengaged with respect to the weight piece, the weight of the weight piece is not applied to the weight hanging frame 34, when the weight string support plate 32 descends one grid, the weight of the uppermost weight piece is applied to the weight hanging frame 34, when the weight string support plate 32 descends one grid again, the weight of the upper two weight pieces is applied to the hanging weight frame 34, therefore, the weight of one weight piece is increased on the weight hanging frame 34 when the weight string support plate 32 descends one grid.
The weight cluster backup pad includes the outer string weight backup pad and the interior string weight backup pad that the upper and lower interval set up, weight drive arrangement includes interior string weight drive arrangement and outer string weight drive arrangement, interior string weight is arranged in on the string weight backup pad, interior string weight backup pad reciprocates under the drive action of interior string weight drive arrangement, outer string weight backup pad reciprocates under the drive action of outer string weight drive arrangement.
In this embodiment, the structure of the inner string weight driving device is the same as that of the outer string weight driving device, and the structures shown in fig. 10 and 11 are selected as an example of the outer string weight driving device: the weight driving device 33 comprises a weight driving motor 331, a sprocket transmission mechanism 332 and weight driving screws 333, two lower support columns 334 are respectively arranged at the left side and the right side between the bottom plate 11 and the middle plate 12, two connecting plates 335 which are arranged at intervals up and down are respectively connected between the two lower support columns 334 at the left side and the two lower support columns at the right side, one weight driving screw 333 is respectively connected between the two connecting plates 335 at the left side and the two connecting plates 335 at the right side, the left end and the right end of the weight string supporting plate 32 are respectively screwed with the weight driving screws 333 through weight driving nuts 336, the sprocket transmission mechanism 332 comprises a driving sprocket 3324, a driven sprocket 3321 and a chain 3322, the driven sprocket 3321 and the weight driving nuts 336 are integrally formed, the lower ends of the two weight driving screws 333 are respectively sleeved with a driven sprocket 3321, and the driving sprocket is connected with, the chain 3322 is wound on the driving chain wheel and the driven chain wheel 3321, and a tension chain wheel 3323 is arranged on the outer side of the chain 3322.
In order to maintain balance, the weight string support plate 32 is a Z-shaped structure, two weight drive screws 333 are diagonally arranged, and the weight string support plate 32 is fitted with two diagonally arranged lower support columns 334.
As shown in fig. 3, the automatic shift control device 5 includes a lower supporting plate 51, a middle supporting plate 52 and an upper supporting plate 53, the lower supporting plate 51, the middle supporting plate 52 and the upper supporting plate 53 are sequentially disposed above the middle plate 12 in parallel from bottom to top, the lower supporting plate 51 can move up and down relative to the middle plate 12, the middle supporting plate 52 can move left and right relative to the lower supporting plate 51, the upper supporting plate 53 can move back and forth relative to the middle supporting plate 52, and the electronic platform scale 6 to be calibrated is disposed above the upper supporting plate 53.
In this embodiment, two upper support columns diagonally arranged and two lower support plate drive screws diagonally arranged are arranged above the middle plate 12, the upper and lower ends of the upper support columns are respectively fixedly connected with the middle plate 12 and the top plate 13, the upper and lower ends of the lower support plate drive screws are respectively rotatably connected with the middle plate 12 and the top plate 13, the lower support plate 51 is screwed with the lower support plate drive screws through nuts, the upper end of one of the lower support plate drive screws is fixedly connected with an output shaft of a lower support plate drive motor, the lower support plate drive motor is arranged above the top plate 13, and the lower support plate drive screws drive the lower support plate 51 to reciprocate up and down when rotating forward and backward. The front side and the rear side above the lower supporting plate 51 are respectively provided with a sliding rail, the front side and the rear side below the middle supporting plate 52 are respectively in corresponding sliding connection with the sliding rails through sliding blocks, a screw nut is arranged below the middle supporting plate 52, a screw rod extending left and right is arranged above the lower supporting plate 51, two ends of the screw rod are respectively connected with the lower supporting plate 51 through bearing seats, one end of the screw rod is connected with a driving motor, and the middle supporting plate 52 is driven to move left and right relative to the lower supporting plate 51 when the screw rod rotates forwards and backwards. The left side and the right side above the middle supporting plate 52 are respectively provided with a sliding rail, the left side and the right side below the upper supporting plate 53 are respectively in corresponding sliding connection with the sliding rails through sliding blocks, a screw nut is arranged below the upper supporting plate 53, a screw rod extending forwards and backwards is arranged above the middle supporting plate 52, two ends of the screw rod are respectively connected with the middle supporting plate 52 through bearing seats, one end of the screw rod is connected with a driving motor, and the screw rod drives the upper supporting plate 53 to move forwards and backwards relative to the middle supporting plate 52 when rotating forwards and backwards.
The inboard pressure head 36 that is equipped with of upper end of weight hoist and mount frame 34, the upper end of weight hoist and mount frame 34 is suspended in the top of waiting to examine the loader of the electronic desk balance 6 through weight hoist and mount motor 35, weight hoist and mount motor 35 installs on roof 13. Wherein, the lower extreme of weight hoist and mount motor 35's output shaft is connected with the upper end of weight hoist and mount frame 34 through hanging the nail, when pressure head 36 puts on waiting to examine the loader of deciding electronic table balance 6, hangs the nail and is in free state, and weight hoist and mount motor 35 stops power output, and no hoist and mount power is applyed on weight hoist and mount frame 34.
As shown in fig. 13, the automatic loading and unloading device 4 for sensing weight comprises a sensing weight string 41 and a sensing weight loading motor 42, wherein the sensing weight loading motor 42 is installed on the top plate 13, and the sensing weight string 41 is suspended above the carrier of the electronic counter scale 6 to be detected through the sensing weight loading motor 42. As shown in fig. 12, the weight-sensing weight string 41 includes a plurality of weight-sensing weights connected by hanging nails, and the weight of the weight-sensing weight applied to the carrier is increased by one step for each stacked weight-sensing weight.
The automatic measurement and control device 2 comprises a control cabinet and a computer, a computer host is arranged in the control cabinet, a display of the computer is arranged in the front of the control cabinet and is visible, the computer host is a main controller, each driving motor of the electronic table scale calibrating device is electrically connected with the main controller through a cable (the main controller is electrically connected with each driving motor, and the main controller is shown in figure 6), and a weight loading value and an actual scale value can be displayed on a display screen of the computer.
The electronic platform scale calibrating device further comprises an automatic imaging identification device 7, wherein the automatic imaging identification device 7 comprises cameras installed on the rack 1, the number of the cameras can be more than one, a plurality of cameras are arranged, the digital display screen of the electronic platform scale can be monitored in an all-dimensional mode, the weighing result displayed by the digital display screen is shot, and an actual scale value picture is obtained. The camera is connected with the computer through a data transmission line, a picture recognition module is arranged in the computer, and an actual weighing value picture shot by the camera is displayed on a display screen of the imaging automatic recognition device 7 after being recognized by the picture recognition module.
As shown in fig. 14, the horizontal side and the vertical side of the upper supporting plate 53 are provided with a scale 531, for example, an L-shaped limit card 532 may be provided at an origin angle of the upper supporting plate 53, when the electronic platform scale to be calibrated is placed on the upper supporting plate 53, one angle of the electronic platform scale to be calibrated is limited at the L-shaped limit card 532, then the horizontal and vertical side dimensions of the electronic platform scale to be calibrated are read by the scale, and are input into the computer, the computer calculates the central position of the electronic platform scale to be calibrated and the X-direction and Y-direction distances from the central position to the pressure head, so that the computer drives the electronic platform scale to be calibrated to move to the center of the carrier thereof below the pressure head through the automatic shift control device 5.
Example 2
As shown in fig. 4 and 5, the structure of the present embodiment is based on the structure of the first embodiment, and further includes an automatic balancing device, which includes four leveling feet 8, one of the corners of the upper supporting plate 53 is an origin corner, the upper supporting plate 53 is provided with 4 grooves 533 located at four corners of a quadrilateral, one of the grooves 533 is located at the origin corner, the four leveling feet 8 are located in the four grooves 533 in a one-to-one correspondence manner, the leveling feet 8 include a leveling plate 81 and a leveling motor 82, the leveling motor 82 is installed at the bottom of the groove 533 groove, the leveling plate 81 is horizontally disposed and fixedly connected to a motor shaft of the leveling motor 82, and the four corners of the electronic table scale 6 to be detected are disposed on the four leveling plates 81 in a one-to-one correspondence manner. The four grooves 533 and the leveling plates 81 are basically paved on the surface of the upper supporting plate 53, so that the placing and leveling of the electronic platform scale 6 to be detected with different sizes can be met.
Generally, a level gauge is embedded on the electronic platform scale to be detected, and an operator can observe the level gauge through naked eyes to determine the level of the electronic platform scale to be detected.
Of course, electron table platform balance calibrating installation can also include the face height scanner, the face height scanner includes laser range finding sensor and sensor drive arrangement, laser range finding sensor locates on the roof and in sensor drive arrangement drive effect under treat the top of the electronic table platform balance around, control reciprocating motion. The laser range finding sensor real-time detection electronic platform scale carrier each angle end and the laser range finding sensor between the distance, generate the distance signal of telecommunication, face height scanner and computer electric connection, with the distance signal of telecommunication transmission to the computer that generates in, be provided with signal identification module in the computer, calculate the difference in height of each angle end of electronic platform scale carrier after the discernment distance signal of telecommunication, computer and automatic balance adjusting device's leveling motor 82 electric connection, according to the difference in height that calculates above confirm which one or more leveling motor 82 start, adjust electronic platform scale carrier to the level, wait to fix the automatic leveling of electronic platform scale from this realization, do not need the operator to observe the state of spirit level.
The above-mentioned surface height scanner may have a structure as shown in fig. 15, in which a front and rear guide rail 91 is provided below each of the left and right sides of the top plate 13, a left guide rail 92 extending rightward is slidably connected to each of the side portions of the front and rear ends of the front and rear guide rail 91 on the left side, a right guide rail 93 extending leftward is slidably connected to each of the side portions of the front and rear ends of the front and rear guide rail 91 on the right side, and the gap between the left and right guide rails on the front side and the gap between the left and right guide rails on the rear side prevent interference between the weight lifting motor and the weight loading motor. The lower parts of the left and right guide rails at the front side and the left and right guide rails at the rear side are respectively connected with a laser ranging sensor 94 in a sliding way.
The two left guide rails 92 and the right guide rail 93 are respectively driven by respective guide rail driving motors to slide back and forth along the front and rear guide rails 91, and the 4 laser ranging sensors 94 are respectively driven by respective sensor driving motors to slide back and forth along the left and right guide rails.
When measuring and detecting the distance between each corner end of the electronic platform scale carrier and the laser ranging sensor, a target object block which can be identified by the laser ranging sensor can be arranged at each corner end of the electronic platform scale carrier.
The working principle of the laser ranging sensor is as follows: the laser diode is aimed at a target object block to emit laser pulses, and the laser is scattered in all directions after being reflected by the target object block. Part of the scattered light returns to the sensor receiver, is received by the optical system and is imaged on the photodiode. The photodiode is an optical sensor having an amplification function therein, so that it can detect an extremely weak optical signal. The time from the emission of the light pulse to the return to be received is recorded and processed, i.e. the distance of the target object mass can be determined.
Example 3
The verification apparatus for electronic platform scale in this embodiment further includes a carrier surface scanner electrically connected to the computer, the carrier surface scanner includes an infrared sensor and an infrared sensor driving device (refer to the structure of the sensor driving device of the surface height scanner in embodiment 2), the infrared sensor collects X, Y coordinate values (X, Y) of four corner ends of the carrier, and transmits the X, Y coordinate values to the computer via data transmission lines for storage, X, Y coordinate values (X0, Y0) of the center point of the carrier are pre-stored in the computer, when X, Y coordinate values of four corners of the carrier are input to the computer, the computing module in the computer automatically calculates the distance (X-X0, Y-Y0) between the corner ends and the center point of the carrier, and then the computer starts the motor of the relevant automatic displacement control device according to the calculated distance value, and moving the central point of the loader of the electronic platform scale to be detected to the lower part of the pressure head.
The initial positions of the four corners of the electronic table scale to be detected can be determined through the surface scanner in the embodiment, an operator can place the electronic table scale to be detected at any position on the upper supporting plate 53, one corner of the electronic table scale to be detected is not required to be aligned with the original point angle of the upper supporting plate 53, the middle supporting plate 52 and the upper supporting plate 53 are not required to be completely returned, the X-direction distance and the Y-direction distance between the central point of the bearing device of the electronic table scale to be detected and the pressure head can be calculated through a computer, and then the electronic table scale to be detected is moved to the central point of the bearing device of the electronic table scale to be detected to be positioned below the pressure head through the automatic.
The invention also provides a calibration method using the electronic platform scale calibration device, which comprises the following steps:
(1) moving the lower supporting plate to a proper height, and then returning the middle supporting plate and the upper supporting plate to the original positions;
(2) the electronic platform scale to be detected is placed on the upper supporting plate, and one corner of the electronic platform scale to be detected is placed at the origin angle of the upper supporting plate;
(3) manually or automatically adjusting the balance of a loader of the electronic platform scale to be detected;
wherein, use face height scanner and automatic balancing device automatic adjustment to wait to examine the balance of the loader of the electronic platform balance of deciding, concrete step is as follows:
(3-1) determining the height dimensions of the transverse and longitudinal edges of the load carrier by using a surface height scanner, in particular the distances between the four corner ends of the load carrier and the laser ranging sensors;
(3-2) the surface height scanner transmits an electric signal corresponding to the distance between the angular end of the loader and the laser ranging sensor into the computer, the computer judges the balance degree of the loader according to the distance signal, and then the balance of the electronic platform scale loader to be detected is automatically adjusted by the aid of the automatic balance adjusting device.
(4) Determining the transverse and longitudinal dimensions of the electronic table scale to be detected by using a scale at the edge of the upper supporting plate, inputting the dimensions into a computer, automatically calculating the position of the center point of a loader of the electronic table scale to be detected by the computer, and then electrifying a driving motor of an automatic shifting control device, and driving the middle supporting plate and the upper supporting plate to move to the position of the center point of the loader of the electronic table scale to be detected below a pressure head of a weight lifting frame by the automatic shifting control device;
(5) the computer is electrified for a weight hoisting motor, a weight hoisting frame is lowered, a pressure head falls on a loader of the electronic table scale to be detected, then the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point of the loader of the electronic table scale to be detected are detected according to a detection rule or a detection process card in sequence, an automatic shift control device is used for switching among the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point in the detection process, an automatic weight loading and unloading device is used for completing automatic weight loading and unloading of 5 detection points, a computer records a weight loading value and an actual scale value, a weight automatic weight loading and unloading device is used for switching gaps among the 5 detection points to drop the sensing weight on the loader of the electronic table scale to be detected, ensuring that the electronic platform scale to be detected is not empty;
(6) after the verification is finished, the automatic weight loading and unloading device and the automatic weight loading and unloading device return;
(7) and taking down the electronic platform scale to be detected from the upper supporting plate, and driving the lower supporting plate, the middle supporting plate and the upper supporting plate to respectively return to the original positions by the automatic shift control device to wait for the next detection.
In the above steps, except that before the calibration is started, a calibrator needs to manually place the electronic platform scale to be calibrated on the upper supporting plate, the electronic platform scale to be calibrated is balanced, and the determination of the central point of the carrier of the electronic platform scale to be calibrated can be manual or automatic, other operations such as weight adding and unloading, automatic shifting and the like are automatically completed by the main controller and are gradually performed according to a pre-written computer program, wherein the computer program is written according to a calibration process card, and partial software formed by combining modules is utilized, but the computer software is not a protection object of the invention.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The electronic platform scale calibrating device is characterized by comprising a rack, an automatic measurement control device, an automatic weight loading and unloading device, an automatic weight sensing and unloading device and an automatic shifting control device, wherein the rack comprises a bottom plate, a middle plate and a top plate which are sequentially and relatively fixedly arranged from bottom to top;
the automatic weight loading and unloading device is a weight reverse loading device and comprises weight strings, weight string supporting plates, a weight driving device, a weight hoisting frame and a weight hoisting motor, wherein the weight strings are arranged above the weight string supporting plates, the weight supporting plates move up and down under the driving action of the weight driving device, the upper ends of the weight strings are connected with the weight hoisting frame, the weight applied to the weight hoisting frame is increased by one step when one section of the weight string is lowered down by the weight supporting plates, and the upper ends of the weight hoisting frame extend to the upper part of the middle plate;
the automatic shifting control device comprises a lower supporting plate, a middle supporting plate and an upper supporting plate, wherein the lower supporting plate, the middle supporting plate and the upper supporting plate are sequentially arranged above the middle plate in parallel from bottom to top;
the upper end of the weight hoisting frame is provided with a pressure head, the pressure head is suspended above a loader of the electronic table scale to be detected through a weight hoisting motor, and the weight hoisting motor is arranged on the top plate;
the automatic loading and unloading device for the sensing weight comprises a sensing weight string and a sensing weight loading motor, wherein the sensing weight loading motor is installed on a top plate, and the sensing weight string is suspended above a bearing device of the electronic counter scale to be detected through the sensing weight loading motor;
the automatic measurement control device comprises a computer, the computer is connected with each driving motor through a data line, and a weight loading value and an actual weighing value are displayed on a display screen of the computer.
2. The electronic platform scale calibrating device according to claim 1, further comprising an automatic imaging recognition device, wherein the automatic imaging recognition device comprises a camera mounted on the frame, the camera is connected with a computer through a data transmission line, a picture recognition module is arranged in the computer, and an actual scale value picture shot by the camera is recognized by the picture recognition module and then displayed on a display screen.
3. The electronic counter scale calibrating device according to claim 1, wherein the weight string comprises an inner string of weights and an outer string of weights which are sleeved, the weight string support plate comprises an outer string of weight support plates and an inner string of weight support plates which are arranged at intervals up and down, the weight driving device comprises an inner string of weight driving device and an outer string of weight driving device, the inner string of weights are arranged on the inner string of weight support plates, the inner string of weight support plates move up and down under the driving action of the inner string of weight driving device, and the outer string of weight support plates move up and down under the driving action of the outer string of weight driving device;
the weight driving device comprises a weight driving motor, a chain wheel transmission mechanism and a weight driving screw rod, two lower support columns are respectively arranged at the left side and the right side between the bottom plate and the middle plate, two connecting plates which are arranged at intervals up and down are respectively connected between the two lower support columns at the left side and the two lower support columns at the right side, a weight driving screw rod is respectively connected between the two connecting plates at the left side and the two connecting plates at the right side, the left end and the right end of the weight string supporting plate are respectively in bolt connection with a weight driving screw through a weight driving nut, the chain wheel transmission mechanism comprises a driving chain wheel, driven chain wheels and chains, the driven chain wheels and weight driving nuts are integrally formed, the lower ends of the two weight driving screws are respectively sleeved with one driven chain wheel, the driving chain wheel is connected with an output shaft of the weight driving motor, the chain is wound on the driving chain wheel and the driven chain wheel, and a tensioning chain wheel is arranged on the outer side of the chain.
4. The electronic platform scale calibrating device according to claim 1 or 3, wherein the weight string comprises a plurality of stacked weight pieces, and each two adjacent weight pieces are connected by hanging nails.
5. The electronic platform scale calibrating device according to claim 1, wherein scales are provided at the lateral and longitudinal edges of the upper supporting plate.
6. The calibrating device for the electronic platform scale according to claim 1, further comprising an automatic balancing device comprising four leveling legs, wherein one of the corners of the upper supporting plate is an origin corner, the upper supporting plate is provided with 4 grooves located at four corners of a quadrilateral, one of the grooves is located at the origin corner, and the four leveling legs are located in the four grooves in a one-to-one manner, the leveling legs comprise a leveling plate and a leveling motor, the leveling motor is installed at the bottom of the groove, the leveling plate is horizontally placed and fixedly connected with a motor shaft of the leveling motor, and four corners of the electronic platform scale to be calibrated are arranged on the four leveling plates in a one-to-one manner.
7. The electronic platform scale calibrating device according to claim 1 or 6, further comprising a surface height scanner, wherein the surface height scanner comprises a laser ranging sensor and a sensor driving device, the laser ranging sensor is arranged on the top plate and reciprocates back and forth and left and right above the electronic platform scale to be calibrated under the driving action of the sensor driving device;
the laser ranging sensor detects the distance between each corner end of the electronic platform scale carrier and the laser ranging sensor in real time to generate a distance electric signal, the surface height scanner is electrically connected with the computer and transmits the generated distance electric signal into the computer, a signal identification module is arranged in the computer and calculates the height difference of each corner end of the electronic platform scale carrier after identifying the distance electric signal, the computer is electrically connected with the leveling motors of the automatic balancing device, and the leveling motor or motors are determined to be started according to the height difference calculated above to adjust the electronic platform scale carrier to the level;
the structure of the surface height scanner is as follows: a front guide rail and a rear guide rail are respectively arranged below the left side and the right side of the top plate, a left guide rail extending rightwards is respectively connected below the front end and the rear end of the front guide rail and the rear end of the left side in a sliding manner, a right guide rail extending leftwards is respectively connected below the front end and the rear end of the front guide rail and the rear end of the right side in a sliding manner, and a gap between the left guide rail and the right guide rail at the front side and a gap between the left guide rail and the right guide rail at the rear side avoid a weight hoisting motor and an; the lower parts of the left and right guide rails on the front side and the left and right guide rails on the rear side are respectively connected with a laser ranging sensor in a sliding way;
the two left guide rails and the right guide rails respectively slide along the front guide rail and the rear guide rail in a reciprocating manner by the respective guide rail driving motors, and the 4 laser ranging sensors respectively slide along the left guide rail and the right guide rail in a reciprocating manner by the respective sensor driving motors;
and each corner end of the electronic platform scale carrier is provided with a target object block which can be identified by the laser ranging sensor, and the distance between the target object block and the laser ranging sensor is the distance between each corner end of the electronic platform scale carrier and the laser ranging sensor.
8. The electronic platform scale certification device of claim 1, further comprising a carrier surface scanner in electrical connection with the computer, the carrier surface scanner includes infrared sensors that collect X, Y coordinate values (X, Y) of four corner ends of the carrier and an infrared sensor driving device, and transmitted to a computer through a data transmission line for storage, X, Y coordinate values (X0, Y0) of the central point of the carrier are prestored in the computer, when X, Y coordinate values of the four corners of the carrier are inputted into the computer, the calculation module in the computer automatically calculates the distance between the corner end and the center point of the carrier (X-X0, Y-Y0), and then the computer starts a motor of the automatic shift control device according to the calculated distance value, and the center point of the loader of the electronic platform scale to be detected is moved to the lower part of the pressure head.
9. A method of calibrating using the electronic platform scale calibration apparatus of any one of claims 1-8, comprising the steps of:
(1) moving the lower supporting plate to a proper height, and then returning the middle supporting plate and the upper supporting plate to the original positions;
(2) the electronic platform scale to be detected is placed on the upper supporting plate, and one corner of the electronic platform scale to be detected is placed at the origin angle of the upper supporting plate;
(3) manually or automatically adjusting the balance of a loader of the electronic platform scale to be detected;
(4) determining the transverse and longitudinal dimensions of the electronic table scale to be detected by using a scale at the edge of the upper supporting plate, inputting the transverse and longitudinal dimensions into a computer, automatically calculating the central dimension of the electronic table scale to be detected by the computer, electrifying a driving motor of the automatic shifting control device, and driving the middle supporting plate and the upper supporting plate to move to the position where the center of the electronic table scale to be detected is positioned below a pressure head of the weight hoisting frame by the automatic shifting control device;
(5) the computer is electrified for a weight hoisting motor, the weight hoisting frame is lowered, a pressure head falls on a loader of the electronic platform scale to be detected, then the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point of the loader of the electronic platform scale to be detected are detected according to a detection process card, an automatic shift control device is used for switching among the center detection point, the first quadrant detection point, the second quadrant detection point, the third quadrant detection point and the fourth quadrant detection point in the detection process, an automatic weight loading and unloading device is used for completing the automatic weight loading and unloading of 5 detection points, the computer records the weight loading value and the actual scale value, and an automatic sensing weight loading and unloading device is used for dropping the sensing weight on the loader of the electronic platform scale to be detected when the 5 detection points are switched, ensuring that the electronic platform scale to be detected is not empty;
(6) after the verification is finished, the automatic weight loading and unloading device and the automatic weight loading and unloading device return;
(7) and taking down the electronic platform scale to be detected from the upper supporting plate, and driving the lower supporting plate, the middle supporting plate and the upper supporting plate to respectively return to the original positions by the automatic shift control device to wait for the next detection.
10. The method for calibrating an electronic platform scale calibrating device according to claim 9, wherein in the step (3), the balance of the carrier of the electronic platform scale to be calibrated is automatically adjusted by using the surface height scanner and the automatic balancing device, and the specific steps are as follows:
(3-1) determining the height dimensions of the transverse and longitudinal edges of the load carrier, in particular the height dimensions of the four corners of the load carrier by using a surface height scanner;
and (3-2) the surface height scanner transmits the electric signal corresponding to the height dimension into the computer, the computer judges the balance degree of the loader according to the height dimension, and then the balance of the loader of the electronic platform scale to be detected is automatically adjusted by using the automatic balance adjusting device.
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