CN113029062A - Automatic calibration device of pull rope type displacement meter and method using same - Google Patents
Automatic calibration device of pull rope type displacement meter and method using same Download PDFInfo
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- CN113029062A CN113029062A CN201911352751.9A CN201911352751A CN113029062A CN 113029062 A CN113029062 A CN 113029062A CN 201911352751 A CN201911352751 A CN 201911352751A CN 113029062 A CN113029062 A CN 113029062A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides an automatic calibration device of a pull rope type displacement meter and a method for using the same, the device comprises a base, an electric linear motion mechanism, a movable platform, a pull rope fastener, a length measuring device fixing component, a length measuring device, a reading head and a digital display screen, wherein the movable platform is arranged on the electric linear motion mechanism, the pull rope fastener is arranged on the movable platform and used for fixing a pull rope of the pull rope type displacement meter, the length measuring device fixing component is fixedly connected with the base, the length measuring device is fixedly arranged on the length measuring device fixing component, the reading head is fixedly connected with the movable platform, the reading head can move along the length direction of the length measuring device under the driving of the movable platform, and the digital display screen is used for displaying the displacement length read by the reading head. By applying the technical scheme of the invention, the technical problems that the manual calibration method in the prior art cannot effectively control the stay rope type displacement calibration precision and the calibration efficiency is low are solved.
Description
Technical Field
The invention relates to the technical field of non-standard pull rope type displacement meters, in particular to an automatic calibration device of a pull rope type displacement meter and a method for using the same.
Background
In the production of non-standard stay cord type displacement, the stay cord type displacement precision needs to be calibrated, so a calibration device is needed to measure and calculate the relation between the pull-out length of the stay cord type displacement and an output signal thereof.
The common calibration method in the prior art is that a hand-operated lead screw is matched with a digital display ruler to measure the pull-out length, and a digital display meter reads the pull-rope type displacement output, namely, a handle of the hand-operated lead screw is rotated to enable a lead screw to rotate a pull-rope type displacement test end to be pulled out to a specified position, the output value of the pull-rope type displacement is recorded, and after the test of all test points is completed, the result is calculated. In the process of calibration by adopting the mode, because the pulling-out distance is manually controlled, the pulling-out distance cannot be accurately controlled, and the requirement can be met only by manually fine-tuning for many times; the manual rotation lead screw has large resistance, the operator is very easy to be tired, the pulling speed is slow, the lead screw needs to be manually rotated to the zero position after the test is finished, and the test efficiency is low. Therefore, the traditional manual calibration method cannot effectively control the stay rope type displacement calibration precision, and meanwhile, the calibration efficiency is low.
Disclosure of Invention
The invention provides an automatic calibration device of a pull rope type displacement meter and a method using the same, which can solve the technical problems that the manual calibration method in the prior art cannot effectively control the calibration precision and the calibration efficiency of the pull rope type displacement meter.
According to an aspect of the present invention, there is provided an automatic calibration device for a pull-cord type displacement meter, the automatic calibration device comprising: a base; the electric linear motion mechanism is arranged on the base; the movable platform is arranged on the electric linear motion mechanism, and the electric linear motion mechanism can drive the movable platform to move along the linear direction; the pull rope fastener is arranged on the movable platform and used for fixing a pull rope of the pull rope type displacement meter; the length measuring device fixing component is fixedly connected with the base; length measurement device, reading head and digital display screen, length measurement device are fixed to be set up on the fixed subassembly of length measurement device, and reading head and movable platform fixed connection, reading head can move along length measurement device's length direction under movable platform's the drive, and the digital display screen is used for showing the displacement length that the reading head read.
Furthermore, the electric linear motion mechanism comprises an automatic driving unit and a synchronous belt conveying mechanism, the automatic driving unit is arranged on the base, the synchronous belt conveying mechanism is in driving connection with the automatic driving unit, and the synchronous belt conveying mechanism is arranged on the base; the automatic driving unit further comprises a motor and a transmission case, the motor is in driving connection with the synchronous belt conveying mechanism through the transmission case, and the transmission case is used for reducing the output rotating speed of the motor and achieving power transmission.
Furthermore, the automatic calibration device of the pull rope type displacement meter further comprises a control unit, the control unit is connected with the motor, and the control unit controls the movement displacement of the movable platform by controlling the number of rotation turns of the motor.
Further, hold-in range transport mechanism includes driving pulley, hold-in range and passive band pulley, and driving pulley is connected with the transmission case, and motor accessible transmission case drives driving pulley and rotates, and passive band pulley rotationally sets up on the base, and passive band pulley passes through the hold-in range to be connected with driving pulley, and movable platform is fixed to be set up on the hold-in range.
Furthermore, the automatic calibration device of the pull rope type displacement meter further comprises a slide rail, the slide rail is fixedly arranged on the base, the slide rail is arranged in parallel with the length measuring device, and the movable platform can move along the slide rail.
Furthermore, automatic calibration device of stay cord formula displacement meter still includes the displacement meter fixing base, and displacement meter fixing base and length measuring device fixed subassembly fixed connection, displacement meter fixing base are used for fixed mounting stay cord formula displacement meter.
Furthermore, the fixed subassembly of length measurement device includes first length measurement device fixing base, first centre gripping subassembly, second length measurement device fixing base and second centre gripping subassembly, first length measurement device fixing base sets up the one end at length measurement device, the second length measurement device fixing base sets up the other end at length measurement device, first centre gripping subassembly is fixed to be set up on first length measurement device fixing base and is used for the fixed one end that centre gripping length measurement device, the second centre gripping subassembly is fixed to be set up on second length measurement device fixing base and is used for the fixed other end that centre gripping length measurement device.
Furthermore, the length measuring device fixing assembly also comprises a first connecting piece and a second connecting piece, the first connecting piece is provided with a first threaded connecting end and a second threaded connecting end, the first connecting piece is fixedly connected with the first length measuring device fixing seat through the first threaded connecting end in a threaded manner, and the first connecting piece is fixedly connected with the first clamping assembly through the second threaded connecting end in a threaded manner; the second connecting piece has third threaded connection end and fourth threaded connection end, and the second connecting piece passes through third threaded connection end and second length measuring device fixing base thread fixed connection, and the second connecting piece passes through fourth threaded connection end and second centre gripping subassembly thread fixed connection.
Further, the length error Δ L of the pull-cord type displacement meter may be obtained from Δ L ═ L' -L, and the temperature-compensated displacement output value S of the pull-cord type displacement meter may be obtained from S ═ S-1+(T-20)×16×10-6X S ', wherein L' is aV3+bV2+ cV + d, L' is the nominal pull-out length of the pull-rope type displacement meter, V is the output of the pull-rope type displacement meter, a, b, c, d are coefficients, S1The method is a measurement value of the pull rope type displacement meter after being calibrated at room temperature, T is the ambient temperature, and S' is the total length of a site pull rope of the pull rope type displacement meter.
According to another aspect of the invention, an automatic marking method of a pull rope type displacement meter is provided, and the automatic marking method of the pull rope type displacement meter uses the automatic marking device of the pull rope type displacement meter to automatically mark the pull rope type displacement meter.
By applying the technical scheme of the invention, the automatic calibration device of the pull rope type displacement meter is provided, the automatic calibration device drives the movable platform to do linear motion through the electric linear motion mechanism and drives the pull rope fastener and the reading head to move, and then data read by the reading head can be displayed through the digital display screen to realize calibration of the pull rope type displacement meter, and the problems of low calibration efficiency and low calibration quality of a manual calibration method can be solved; in addition, the reading head and the pull rope of the pull rope type displacement meter move simultaneously along with the movement of the movable platform, the reading head corresponds to the scales on the length measuring device, and measured data are displayed on the digital display screen in real time, the pull length of the pull rope can be calibrated in real time in the mode, the size precision control is high, and the calibration quality and the calibration efficiency are greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 shows a schematic structural diagram of an automatic calibration device of a pull-rope type displacement meter according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a movable platform; 20. a pull cord fastener; 30. a length measuring device securing assembly; 31. a first length measuring device holder; 32. a first clamping assembly; 321. a first clamping body; 322. a first jaw; 33. a second length measuring device holder; 34. a second clamping assembly; 341. a second clamping body; 342. a second jaw; 35. a first connecting member; 36. a second connecting member; 40. a length measuring device; 50. a reading head; 60. a digital display screen; 70. an automatic driving unit; 71. a motor; 72. a transmission case; 80. a synchronous belt conveying mechanism; 90. a slide rail; 100. a displacement meter fixing seat; 110. an angle iron fixing frame; 200. a pull rope type displacement meter.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1, according to an embodiment of the present invention, there is provided an automatic calibration device for a pull-cord type displacement meter, the automatic calibration device for a pull-cord type displacement meter includes a base, an electric linear motion mechanism, a movable platform 10, a pull-cord fastener 20, a length-measuring-device fixing component 30, a length-measuring device 40, a reading head 50 and a digital display screen 60, wherein the movable platform 10 is disposed on the electric linear motion mechanism, the electric linear motion mechanism can drive the movable platform 10 to move along a linear direction, the pull-cord fastener 20 is disposed on the movable platform 10, the pull-cord fastener 20 is used for fixing a pull cord of the pull-cord type displacement meter, the length-measuring-device fixing component 30 is fixedly connected to the base, the length-measuring device 40 is fixedly disposed on the length-measuring-device fixing component 30, the reading head 50 is fixedly connected to the movable platform 10, the reading head 50 can be driven by the movable platform 10 to move along a, the digital display screen 60 is used for displaying the displacement length read by the reading head 50.
By applying the configuration mode, the automatic calibration device of the pull rope type displacement meter is provided, the movable platform is driven to do linear motion through the electric linear motion mechanism, the pull rope fastener and the reading head are driven to move, and then data read by the reading head can be displayed through the digital display screen to realize calibration of the pull rope type displacement meter, and the problems of low calibration efficiency and low calibration quality of a manual calibration method can be solved; in addition, the reading head and the pull rope of the pull rope type displacement meter move simultaneously along with the movement of the movable platform, the reading head corresponds to the scales on the length measuring device, and measured data are displayed on the digital display screen in real time, the pull length of the pull rope can be calibrated in real time in the mode, the size precision control is high, and the calibration quality and the calibration efficiency are greatly improved.
Specifically, in the invention, when the pull-rope type displacement meter 200 needs to be calibrated, the pull rope is fixed on the movable platform 10 through the pull rope fastener, the reading head 50 is fixedly connected with the movable platform 10, the movable platform 10 is driven by the electric linear motion mechanism to move along a straight line, the movable platform 10 can move to drive the reading head and the pull rope to move simultaneously, the reading head and the length measuring device are arranged in a one-to-one correspondence manner, the measured size can be displayed on a digital display screen in real time, and therefore, the calibration of different pull-out lengths of the pull-rope type displacement meter 200 can be realized through the reading head.
Further, in the present invention, in order to drive the movable platform to move in the linear direction, the electric linear motion mechanism may be configured to include a synchronous belt conveying assembly, a linear module, or a linear motor, and the like, and the movable platform may be driven to move in the linear direction by using any of the above three methods.
Specifically, in the present invention, when a mode of driving the movable platform to move by using the synchronous belt is adopted, the electric linear motion mechanism includes an automatic driving unit 70 and a synchronous belt transmission mechanism 80, the automatic driving unit 70 is disposed on the base, the synchronous belt transmission mechanism 80 is in driving connection with the automatic driving unit 70, and the synchronous belt transmission mechanism 80 is disposed on the base; the automatic driving unit 70 further comprises a motor 71 and a transmission case 72, the motor 71 is in driving connection with the synchronous belt transmission mechanism 80 through the transmission case 72, and the transmission case 72 is used for reducing the output rotating speed of the motor 71 and realizing power transmission.
In addition, in the present invention, in order to control the pull-out length of the pull-cord type sensor, the automatic calibration apparatus of the pull-cord type displacement meter may be configured to further include a control unit connected to the motor 71, the control unit controlling the movement displacement of the movable platform 10 by controlling the number of rotations of the motor 71. Under this kind of configuration, when needs to the setting of drawing out length of stay cord formula displacement meter and mark, through the number of turns of rotation of control motor, and then can realize marking the stay cord formula displacement meter of setting out length.
Further, in the present invention, in order to realize the movement of the movable platform in the linear direction, the synchronous belt transmission mechanism 80 may be configured to include a driving pulley, a synchronous belt, and a driven pulley, the driving pulley is connected to the transmission case 72, the motor 71 may drive the driving pulley to rotate through the transmission case 72, the driven pulley is rotatably disposed on the base, the driven pulley is connected to the driving pulley through the synchronous belt, and the movable platform 10 is fixedly disposed on the synchronous belt.
In addition, in the present invention, in order to guide the movable platform to move along the linear direction, the automatic calibration device of the pull-rope type displacement meter may be configured to further include a slide rail 90, the slide rail 90 is fixedly disposed on the base, the slide rail 90 is disposed parallel to the length measuring device 40, and the movable platform 10 may move along the slide rail 90. In the present invention, the length measuring device 40 includes a ball bar ruler, a magnetic bar ruler, a grating ruler, or the like.
Further, in the present invention, in order to avoid the problem of poor stability caused by the inclination of the pull-cord type displacement meter in the process of being pulled out, the automatic calibration device for a pull-cord type displacement meter may be configured to further include a displacement meter fixing base 100, the displacement meter fixing base 100 is fixedly connected with the length measuring device fixing component 30, and the displacement meter fixing base 100 is used for fixedly mounting the pull-cord type displacement meter 200. In addition, the head of the stay cord type displacement meter can be hung through the stay cord fastener, so that the stay cord can be pulled out.
In addition, in the present invention, in order to simplify the device structure, reduce the device occupation space, and reduce the cost, as shown in fig. 1, the length measuring device fixing assembly 30 may be configured to include a first length measuring device fixing base 31, a first clamping assembly 32, a second length measuring device fixing base 33, and a second clamping assembly 34, the first length measuring device fixing base 31 being disposed at one end of the length measuring device, the second length measuring device fixing base 33 being disposed at the other end of the length measuring device 40, the first clamping assembly 32 being fixedly disposed on the first length measuring device fixing base 31 and being used to fixedly clamp one end of the length measuring device 40, and the second clamping assembly 34 being fixedly disposed on the second length measuring device fixing base 33 and being used to fixedly clamp the other end of the length measuring device 40.
Further, in the present invention, in order to facilitate the fixing of the clamping assembly on the length measuring device fixing base, the length measuring device fixing assembly 30 may be configured to further include a first connecting member 35 and a second connecting member 36, the first connecting member 35 has a first threaded connection end and a second threaded connection end, the first connecting member 35 is fixedly connected to the first length measuring device fixing base 31 through the first threaded connection end, and the first connecting member 35 is fixedly connected to the first clamping assembly 32 through the second threaded connection end; the second connecting piece 36 has a third threaded end and a fourth threaded end, the second connecting piece 36 is in threaded fixed connection with the second length measuring device fixing seat 33 through the third threaded end, and the second connecting piece 36 is in threaded fixed connection with the second clamping assembly 34 through the fourth threaded end.
In addition, in the present invention, in order to facilitate the movement of the reading head on the movable platform, the automatic calibration device of the pull-rope type displacement meter may be configured to further include an angle iron fixing frame 110, and the reading head 50 is fixedly disposed on the movable platform 10 through the angle iron fixing frame 110. A
Further, in the present invention, the pull-cord type displacement meter measures every 10CM when calibrating, and the pull-out length of the pull-cord type displacement meter is L, and the calibration pull-out length is L'. Taking the calibration of a one-meter pull rope type displacement meter as an example, 10 points are measured in total, namely the lengths to be pulled are L1, L2, … and L10, and the outputs of the pull rope type displacement meter are V1, V2, … and V10. Fitting according to the pull-out length of the pull-rope type displacement meter and the output of the pull-rope type displacement meter to obtain the relation between the calibration output length of the pull-rope type displacement meter and the output of the pull-rope type displacement meter, namely L' ═ aV3+bV2And the + cV + d, L 'is the calibrated pull-out length of the pull-rope type displacement meter, V is the output of the pull-rope type displacement meter, a, b, c and d are coefficients, and the calibrated pull-out lengths L1', L2', … and L10' of all positions can be calculated by substituting the output of the pull-rope type displacement meter into the formula. And subtracting the length L to be pulled from the calibrated pull-out length L' of the pull-rope type displacement meter to obtain the length error delta L of each position of the pull-rope type displacement meter, wherein the maximum value of the absolute value is the error value of the pull-rope type displacement meter.
In addition, in the invention, the pulling rope of the pulling rope type displacement meter is made of 304 stainless steel wire ropes, and the linear expansion coefficient is 16 multiplied by 10－6The pull rope length of the sensor is 1000mm, the working temperature range is-20 ℃ to 55 ℃, and the ultimate error at high temperature can be calculated as follows: 16X 10－6X (55-20) × 1000 ═ 0.48mm, the limiting error at low temperature is: 16X 10－6X (-20-20) × 1000 ═ -0.64 mm; it can be seen that the temperature change has a greater effect on the length of the steel cord because the thermal expansion of the steel cord is linear, the length change of the steel cord at different temperatures can be calculated, and the error is eliminated in the measurement result by the following formula.
That is, the displacement output value S after the temperature compensation of the pull rope type displacement meter can be S according to S ═ S1+(T-20)×16×10-6Is multiplied by S', wherein S1The method is a measurement value of the pull rope type displacement meter after being calibrated at room temperature, T is the ambient temperature, and S' is the total length of a site pull rope of the pull rope type displacement meter.
According to another aspect of the invention, an automatic marking method of a pull-rope type displacement meter is provided, and the automatic marking method of the pull-rope type displacement meter uses the automatic marking device of the pull-rope type displacement meter to automatically mark the pull-rope type displacement meter. According to the method, by using the automatic calibration device provided by the invention, the movable platform can be driven to do linear motion through the electric linear motion mechanism and drive the pull rope fastener and the reading head to move, and then the data read by the reading head can be displayed through the digital display screen to realize calibration of the pull rope type displacement meter, so that the problems of low calibration efficiency and low calibration quality of a manual calibration method can be solved; in addition, the reading head and the pull rope of the pull rope type displacement meter move simultaneously along with the movement of the movable platform, the reading head corresponds to the scales on the length measuring device, and measured data are displayed on the digital display screen in real time, the pull length of the pull rope can be calibrated in real time in the mode, the size precision control is high, and the calibration quality and the calibration efficiency are greatly improved.
In order to further understand the present invention, the automatic calibration device of the pull-rope type displacement meter provided by the present invention is described in detail below with reference to fig. 1.
As shown in fig. 1, according to an embodiment of the present invention, an automatic calibration device for a pull-cord type displacement meter is provided, which includes a base, a movable platform 10, a pull-cord fastener 20, a length measuring device fixing assembly 30, a length measuring device 40, a reading head 50, a digital display screen 60, an automatic driving unit 70, a synchronous belt transmission mechanism 80, a slide rail 90, a displacement meter fixing seat 100, an angle iron fixing seat 110, and a control unit, wherein the automatic driving unit 70 includes a motor 71 and a transmission case 72, the motor 71 is in driving connection with the synchronous belt transmission mechanism 80 through the transmission case 72, and the transmission case 72 is used for reducing an output rotation speed of the motor 71 and realizing power transmission. Synchronous belt conveying mechanism 80 includes driving pulley, hold-in range and passive band pulley, and driving pulley is connected with transmission case 72, and motor 71 accessible transmission case 72 drives driving pulley and rotates, and passive band pulley rotationally sets up on the base, and passive band pulley passes through the hold-in range to be connected with driving pulley, and portable platform 10 is fixed to be set up on the hold-in range, and motor 71 can drive portable platform 10 through the motion of drive hold-in range and remove along rectilinear direction.
The automatic driving unit 70 and the synchronous belt conveying mechanism 80 are arranged on a base through M6 bolts, the base is fixedly connected with the length measuring device fixing component 30, and the ball grid ruler fixing component 30 is fixed on the workbench to prevent the ball grid ruler from moving in the calibration process of the pull rope type displacement meter. In addition, in the present embodiment, in order to reduce the overall mass of the device while ensuring the self-strength and the operation stability of the device, the pull-cord fastener 20 may be made of an aluminum alloy material. Without limitation, other materials may be used.
The reading head 50 (e.g., 2G module) is disposed corresponding to the length measuring device 40, and the reading head 50 can display and feedback the calibrated size. The reading head 50 is fixedly connected with the movable platform 10 through an angle iron fixing frame 110, and the reading head 50 is sleeved on the length measuring device 40. The length measuring device 40 is fixedly arranged on the workbench through the ball grid ruler fixing component 30, the length measuring device fixing component 30 comprises a first length measuring device fixing seat 31, a first clamping component 32, a second length measuring device fixing seat 33, a second clamping component 34, a first connecting piece 35 and a second connecting piece 36, the first length measuring device fixing seat 31 is arranged at one end of the length measuring device, the second length measuring device fixing seat 33 is arranged at the other end of the length measuring device 40, and the first length measuring device fixing seat 31 and the second length measuring device fixing seat 33 can play a role in supporting the length measuring device. The reading head can make linear motion on the length measuring device by the mode, and the structure has the advantages of convenient installation, reliable operation, small occupied space and low cost. The first clamping assembly 32 is fixedly arranged on the first length measuring device fixing seat 31 and is used for fixedly clamping one end of the length measuring device 40, and the second clamping assembly 34 is fixedly arranged on the second length measuring device fixing seat 33 and is used for fixedly clamping the other end of the length measuring device 40.
The first connecting piece 35 is provided with a first threaded connecting end and a second threaded connecting end, the first connecting piece 35 is fixedly connected with the first length measuring device fixing seat 31 through the first threaded connecting end in a threaded manner, and the first connecting piece 35 is fixedly connected with the first clamping assembly 32 through the second threaded connecting end in a threaded manner; the second connecting piece 36 has a third threaded end and a fourth threaded end, the second connecting piece 36 is in threaded fixed connection with the second length measuring device fixing seat 33 through the third threaded end, and the second connecting piece 36 is in threaded fixed connection with the second clamping assembly 34 through the fourth threaded end. In this embodiment, the first clamping assembly 32 includes a first clamping body 321 and a first clamping jaw 322, the first clamping body 321 is connected to the first connecting member 35, and the first clamping jaw 322 is used for clamping one end of the fixed length measuring device. The second clamping assembly 34 includes a second clamping body 341 and a second clamping jaw 342, the second clamping body 341 is connected with the second connector 36, and the second clamping jaw 342 is used for clamping the other end of the fixed length measuring device.
In addition, as shown in fig. 1, counter bores may be designed at the bottom of the first length measuring device fixing seat 31 and the second length measuring device fixing seat 33, and the counter bores may enable the length measuring device fixing seats to be free from interference when being installed on a workbench, so as to enable the length measuring device fixing seats to be better attached to the workbench.
When the pull-rope type displacement meter 200 needs to be calibrated, the displacement meter fixing seat 100 is fixedly connected with the ball grid ruler fixing seat, the pull-rope fastener 20 is installed on the movable platform 10, the pull rope of the pull-rope type displacement meter 200 is hung on the pull-rope fastener 20, the reading head 50 is fixed on the movable platform 10 through the angle iron fixing frame 110, the motor 71 can drive the driving pulley to rotate through the transmission case 72, the driving pulley rotates to drive the synchronous belt to move, and the synchronous belt can drive the movable platform 10 to do reciprocating linear motion along the sliding rail 90. The movable platform 10 can drive the reading head 50 and the pull rope to move synchronously along the linear direction, and the reading head 50 is sleeved on the length measuring device and can read data on the length measuring device in real time. Under the control of the control unit, when 100mm is displayed on the digital display screen 60, the reading of the pull rope type displacement meter is read, so that one-time calibration can be realized; then the movable platform 10 continues to move, when 200mm is displayed on the digital display screen 60, the reading of the pull rope type displacement meter 200 is read again, and one-time calibration can be realized. And the like until the calibration is up to 2000 mm. When all tests are complete, the movable platform 10 may automatically return to the zero position.
In this way, the movable platform 10 moves along the linear direction and drives the pull rope fastener 20 and the reading head to move, so that data is obtained on the digital display screen, and the data is compared with the data of the pull rope type sensor, so that the calibration of the pull rope type sensor can be realized. The method has high dimensional precision control, and greatly improves the calibration quality and the calibration efficiency.
In summary, the invention provides an automatic calibration device for a pull rope type displacement meter, the automatic calibration device drives a movable platform to do linear motion through an automatic driving unit and drives a pull rope fastener and a reading head to move, and then data read by the reading head can be displayed through a digital display screen to realize calibration of the pull rope type displacement meter, and the method can overcome the problems of low calibration efficiency and low calibration quality of a manual calibration method; in addition, the reading head and the pull rope of the pull rope type displacement meter move simultaneously along with the movement of the movable platform, the reading head corresponds to the scales on the length measuring device, and measured data are displayed on the digital display screen in real time, the pull length of the pull rope can be calibrated in real time in the mode, the size precision control is high, and the calibration quality and the calibration efficiency are greatly improved.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an automatic calibration device of stay cord formula displacement meter which characterized in that, the automatic calibration device of stay cord formula displacement meter includes:
a base;
the electric linear motion mechanism is arranged on the base;
the movable platform (10), the movable platform (10) is arranged on the electric linear motion mechanism, and the electric linear motion mechanism can drive the movable platform (10) to move along a linear direction;
the pull rope fastener (20), the pull rope fastener (20) is arranged on the movable platform (10), and the pull rope fastener (20) is used for fixing a pull rope of the pull rope type displacement meter;
a length measuring device fixing component (30), wherein the length measuring device fixing component (30) is fixedly connected with the base;
length measurement device (40), reading head (50) and digital display screen (60), length measurement device (40) are fixed to be set up on length measurement device fixed subassembly (30), reading head (50) with but movable platform (10) fixed connection, reading head (50) can be in but movable platform (10) drive down the edge the length direction removal of length measurement device (40), digital display screen (60) are used for showing the displacement length that reading head (50) read.
2. The automatic calibration device of the pull-rope type displacement meter according to claim 1, wherein the electric linear motion mechanism comprises an automatic driving unit (70) and a synchronous belt conveying mechanism (80), the automatic driving unit (70) is arranged on the base, the synchronous belt conveying mechanism (80) is in driving connection with the automatic driving unit (70), and the synchronous belt conveying mechanism (80) is arranged on the base; the automatic driving unit (70) further comprises a motor (71) and a transmission case (72), the motor (71) is connected with the synchronous belt conveying mechanism (80) in a driving mode through the transmission case (72), and the transmission case (72) is used for reducing the output rotating speed of the motor (71) and achieving power transmission.
3. The automatic calibration device of a pull rope type displacement meter according to claim 2, characterized in that the automatic calibration device of a pull rope type displacement meter further comprises a control unit, the control unit is connected with the motor (71), and the control unit controls the movement displacement of the movable platform (10) by controlling the number of rotation turns of the motor (71).
4. The automatic calibration device of a guy rope type displacement meter according to claim 2, wherein the synchronous belt transmission mechanism (80) comprises a driving pulley, a synchronous belt and a driven pulley, the driving pulley is connected with the transmission case (72), the motor (71) can drive the driving pulley to rotate through the transmission case (72), the driven pulley is rotatably arranged on the base, the driven pulley is connected with the driving pulley through the synchronous belt, and the movable platform (10) is fixedly arranged on the synchronous belt.
5. The automatic calibration device of the pull-rope type displacement meter according to claim 4, characterized in that the automatic calibration device further comprises a slide rail (90), the slide rail (90) is fixedly arranged on the base, the slide rail (90) is arranged in parallel with the length measuring device (40), and the movable platform (10) can move along the slide rail (90).
6. The automatic calibration device of the pull-rope type displacement meter according to claim 5, further comprising a displacement meter fixing seat (100), wherein the displacement meter fixing seat (100) is fixedly connected with the length measuring device fixing component (30), and the displacement meter fixing seat (100) is used for fixedly mounting the pull-rope type displacement meter.
7. The automatic calibration device of a pull rope type displacement meter according to claim 6, the length measuring device fixing component (30) comprises a first length measuring device fixing seat (31), a first clamping component (32), a second length measuring device fixing seat (33) and a second clamping component (34), the first length measuring device fixing seat (31) is arranged at one end of the length measuring device, the second length measuring device fixing seat (33) is arranged at the other end of the length measuring device (40), the first clamping component (32) is fixedly arranged on the first length measuring device fixing seat (31) and is used for fixedly clamping one end of the length measuring device (40), the second clamping assembly (34) is fixedly arranged on the second length measuring device fixing seat (33) and is used for fixedly clamping the other end of the length measuring device (40).
8. The automatic calibration device of the pull-rope type displacement meter according to claim 7, wherein the length measuring device fixing component (30) further comprises a first connecting piece (35) and a second connecting piece (36), the first connecting piece (35) is provided with a first threaded connecting end and a second threaded connecting end, the first connecting piece (35) is in threaded fixed connection with the first length measuring device fixing seat (31) through the first threaded connecting end, and the first connecting piece (35) is in threaded fixed connection with the first clamping component (32) through the second threaded connecting end; the second connecting piece (36) is provided with a third threaded connecting end and a fourth threaded connecting end, the second connecting piece (36) is fixedly connected with the second length measuring device fixing seat (33) through the third threaded connecting end in a threaded manner, and the second connecting piece (36) is fixedly connected with the second clamping assembly (34) through the fourth threaded connecting end in a threaded manner.
9. The automatic calibration device of claim 8, wherein the length error Δ L of the pull-rope type displacement meter is obtained according to Δ L ═ L' -L, and the temperature-compensated displacement output value S of the pull-rope type displacement meter is obtained according to S ═ S-1+(T-20)×16×10-6X S ', wherein L' is aV3+bV2+ cV + d, L' is the calibrated pull-out length of the pull-rope type displacement meter, V is the output of the pull-rope type displacement meter, a, b, c, d are coefficients, S1And the measured value is the measured value of the pull rope type displacement meter after the room temperature calibration, T is the ambient temperature, and S' is the total length of the site pull rope of the pull rope type displacement meter.
10. An automatic marking method of a pull rope type displacement meter, which is characterized in that the automatic marking method of the pull rope type displacement meter uses the automatic marking device of the pull rope type displacement meter according to any one of claims 1 to 9 to automatically mark the pull rope type displacement meter.
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| CN117405163A (en) * | 2023-12-07 | 2024-01-16 | 科瑞工业自动化系统（苏州）有限公司 | Active error compensation method and system for stay cord encoder |
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