CN115060294A - Wireless inclinometer calibration system - Google Patents
Wireless inclinometer calibration system Download PDFInfo
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- CN115060294A CN115060294A CN202210980447.4A CN202210980447A CN115060294A CN 115060294 A CN115060294 A CN 115060294A CN 202210980447 A CN202210980447 A CN 202210980447A CN 115060294 A CN115060294 A CN 115060294A
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- wireless inclinometer
- calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
Abstract
The invention discloses a wireless inclinometer calibration system, which relates to the technical field of inclinometers and comprises an upper computer, a central control rotary platform, an adapter plate and a calibration plate; the upper computer is used for sending a pulse instruction to the PLC; the PLC is used for sending a pulse instruction to the stepping motor driver so as to drive the stepping motor to rotate; the middle control rotating platform is driven to rotate at a preset standard speed, so that the inclination of the angle of the wireless inclinometer is realized; the adapter plate and the calibration plate are in contact with each other in a mutually vertical way and are locked through threaded connection; the sunken groove on the calibration plate is consistent with the outline of the wireless inclinometer, so that good positioning precision is improved for repeated installation and calibration of the wireless inclinometer, and the wireless inclinometer is locked on the calibration plate through threaded connection, so that the randomness of repeated installation is reduced; the central control rotary platform drives the calibration plate to rotate, so that calibration of the accelerometer and calibration of temperature compensation are realized, and the calibration efficiency of the wireless inclinometer is improved.
Description
Technical Field
The invention relates to the technical field of inclinometers, in particular to a wireless inclinometer calibration system.
Background
The high-precision inclinometer is widely applied to various fields such as vehicle chassis leveling detection, high tower or high building monitoring, bridge and dam monitoring, high-precision laser platform equipment and the like, and the high-precision double-shaft inclinometer on the market at present has low precision under the condition of large range and cannot meet the requirements of practical application;
the prior inclinometer is characterized in that a milling machine index head is used for equally or unequally dividing a circumference to generate an inclination angle, and the inclinometer is calibrated and checked on the inclination angle; the mechanical clearance of the milling machine dividing head ensures that the precision of repeated positioning is not high, the angle positioning of the dividing head needs to be completed by manually rotating a hand wheel, the labor intensity of a calibrating personnel is high during batch production, the difference of the calibration of the inclinometer at each time is large, and the calibration efficiency cannot be improved; based on the defects, the invention provides a wireless inclinometer calibration system.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art; therefore, the invention provides a wireless inclinometer calibration system, which can automatically control the change of the inclination angle and automatically complete calibration by using a system consisting of a stepping motor, a stepping motor driver, a PLC, a central control rotary platform and the like under the condition of a given inclination angle by a tester, thereby reducing the randomness of repeated installation, improving the installation precision of repeated calibration of the wireless inclinometer and further improving the calibration precision of the wireless inclinometer.
In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a wireless inclinometer calibration system, including an upper computer, a PLC controller, a parameter acquisition module, a parameter analysis module, a rack, a stepping motor, a central control rotary platform, a patch panel, a calibration panel, and a wireless inclinometer;
the upper computer is used for sending a pulse instruction to the PLC; the PLC is used for sending a pulse instruction to the stepping motor driver so as to drive the stepping motor to rotate; the rotary motion is transmitted to the central control rotary platform, and the central control rotary platform is driven to rotate at a preset standard speed, so that the inclination of the angle of the wireless inclinometer is realized;
when the central control rotating platform rotates at a preset standard speed, the parameter analysis module is used for carrying out early warning analysis on the operation parameter data of the stepping motor and reminding workers to overhaul the stepping motor so as to avoid influencing the marking work of the wireless inclinometer;
the specific marking process of the wireless inclinometer comprises the following steps:
firstly, the Y axis of the wireless inclinometer faces the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate 90 degrees clockwise and anticlockwise around the Y axis, then the wireless inclinometer rotates 180 degrees around the Y axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; then the wireless inclinometer is rotated by 90 degrees, the X axis of the wireless inclinometer faces to the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate by 90 degrees clockwise and anticlockwise around the X axis and then rotate by 180 degrees around the X axis, and the three-axis acceleration measurement values of the accelerometer at three positions at the moment are acquired; the method comprises the steps of realizing rapid calibration of six inclination angles of an X axis and a Y axis of the single-axis turntable automatically calibrating the wireless inclinometer, establishing an error calibration model, obtaining a three-axis acceleration calibration formula and calibrating the accelerometer;
fixing the wireless inclinometer calibration system in a high and low temperature test box, establishing a functional relation between the inclination angle error and the temperature to obtain a temperature compensation formula, and realizing the calibration of the wireless inclinometer temperature compensation.
Further, the method for acquiring the rotation angle of the central control rotating platform comprises the following steps:
marking the reduction ratio of the central control rotary platform as i, and marking the step angle as alpha; marking the pulse number sent by the PLC as M, dividing the stepper motor driver into N in equal parts, and recording the rotation angle of the central control rotation platform as theta, wherein the theta is = (alpha multiplied by M)/(i multiplied by N).
Further, the central control rotary platform rotates at a preset standard speed, and specifically comprises:
acquiring the actual rotating speed of the centralized control rotating platform through a rotating speed sensor;
the PLC is used for comparing the actual rotating speed with a preset standard speed; if the speed error is larger than the preset difference range, feeding back a pulse adjusting signal to an upper computer, and adjusting a pulse instruction output by the upper computer; the specific adjustment content comprises the frequency and the number of pulse transmission; so that the central control rotary platform rotates at a preset standard speed.
Furthermore, the parameter acquisition module is a sensor group connected with the stepping motor and used for acquiring the operation parameter data of the stepping motor and transmitting the acquired operation parameter data to the parameter analysis module for comprehensive analysis; the sensor group comprises a voltage sensor, a current sensor, a rotating speed sensor, a vibration sensor and a temperature sensor; the operational parameter data includes real-time current, real-time voltage, and rotational speed, vibration frequency, and real-time temperature of the stepper motor flowing through the stepper motor.
Further, the specific analysis steps of the parameter analysis module are as follows:
s1: acquiring corresponding real-time current, real-time voltage, rotating speed, vibration frequency and real-time temperature in the operation parameter data, and sequentially marking the current, the voltage, the rotating speed, the vibration frequency and the real-time temperature as DL, DY, ZS, ZD and WT;
calculating an operation coefficient YX of the stepping motor by using a formula YX = DL × b1+ DY × b2+ ZS × b3+ ZD × b4, wherein b1, b2, b3 and b4 are coefficient factors;
s2: establishing a first analysis array; the first analysis array comprises an operation coefficient YX and a real-time temperature WT of the stepping motor which are obtained at the same moment; establishing an operation curve of the stepping motor by taking the operation coefficient YX as an independent variable and the real-time temperature WT as a dependent variable, and deriving the operation curve to obtain an operation derivative curve;
s3: acquiring a point of which the derivative is 0 in the running derivative curve and marking the point as a stationary point; calculating the time difference of the acquisition moments of the operation coefficients corresponding to the two adjacent stagnation points to obtain a stagnation and transformation time length ZT;
comparing the standing time length ZT with a preset time length threshold value; if the standing variable time length ZT is more than or equal to the time length threshold value, and the real-time temperature WT1 at the time meets the condition that (RT-mu) is more than or equal to WT1 and more than or equal to (RT + mu); judging that the stepping motor operates normally at the moment; otherwise, the step motor operates abnormally; generating an abnormal signal; wherein RT is a preset temperature threshold corresponding to the stepping motor; mu is a compensation factor; the parameter analysis module is used for transmitting the abnormal signal to the PLC controller, the PLC controller is used for receiving the abnormal signal and then controlling the stepping motor to stop, and the drive control alarm module gives an alarm to remind a worker to overhaul the stepping motor.
Furthermore, a pulse instruction sent to a stepping motor driver through the PLC controller realizes the starting, stopping and reversing of the central control rotary platform; the pulse finger includes a pulse signal PUL, a direction signal DIR, and an enable signal ENA.
Further, the rack comprises a bottom plate, side plates and a supporting plate, and is used for installing and controlling the rotating platform; spiral helical teeth and crossed roller bearings are adopted in the central control rotary platform; and a rotating shaft of the stepping motor is inserted into the tail part of the rotary control platform and is locked by a locking ring screw reserved on the side edge.
Furthermore, the adapter plate and the calibration plate are connected and locked in a mutually vertical contact mode by threads; the sunken groove on the calibration plate is consistent with the outline of the wireless inclinometer.
Compared with the prior art, the invention has the beneficial effects that:
1. the upper computer is used for sending a pulse command to the PLC; the PLC is used for sending a pulse instruction to the stepping motor driver so as to drive the stepping motor to rotate, and transmitting the rotating motion to the central control rotating platform to drive the central control rotating platform to rotate; the PLC is used for comparing the actual rotating speed with a preset standard speed; if the speed error is larger than the preset difference range, feeding back a pulse adjusting signal to an upper computer, and adjusting a pulse instruction output by the upper computer; the specific adjustment content comprises the frequency and the number of pulse transmission; the central control rotating platform can rotate at a preset standard speed, so that the inclination of the angle of the wireless inclinometer is realized, and the measurement error is reduced;
2. the adapter plate and the calibration plate are connected and locked by threads in a mutually vertical contact mode; the sunken groove on the calibration plate is consistent with the outline of the wireless inclinometer, wherein the clearance between the outline and the wireless inclinometer improves the good positioning precision for the repeated installation and calibration of the wireless inclinometer, and the wireless inclinometer is locked on the calibration plate by threaded connection, so that the randomness of repeated installation is reduced; when the central control rotating platform rotates at a preset standard speed, the parameter analysis module is used for carrying out early warning analysis on the operation parameter data of the stepping motor so as to remind workers to overhaul the stepping motor and avoid influencing the marking work of the wireless inclinometer;
3. firstly, the Y axis of the wireless inclinometer faces the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate 90 degrees clockwise and anticlockwise around the Y axis and then rotate 180 degrees around the Y axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; then the wireless inclinometer is rotated by 90 degrees, the X axis of the wireless inclinometer faces to the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate by 90 degrees clockwise and anticlockwise around the X axis, and then rotated by 180 degrees around the X axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; the method comprises the steps of realizing rapid calibration of six inclination angles of an X axis and a Y axis of the single-axis turntable automatically calibrating the wireless inclinometer, establishing an error calibration model, obtaining a three-axis acceleration calibration formula and calibrating the accelerometer; the wireless inclinometer calibration system is fixed in the high and low temperature test box, the functional relation between the inclination angle error and the temperature is established, a temperature compensation formula is obtained, the calibration of the wireless inclinometer temperature compensation is realized, and the calibration efficiency of the wireless inclinometer is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a system block diagram of a wireless inclinometer calibration system according to the present invention.
Fig. 2 is a schematic structural diagram of a wireless inclinometer calibration system according to the present invention.
FIG. 3 is a schematic view of the connection between the stepping motor and the central control rotary platform according to the present invention.
In the figure: 1. a frame; 1.1, a bottom plate; 1.2, side plates; 1.3, a support plate; 2. a stepping motor; 3. a central control rotary platform; 3.1, locking a ring screw; 4. an adapter plate; 5. calibrating the plate; 5.1, a groove; 6. wireless inclinometer.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 to 3, a wireless inclinometer calibration system comprises an upper computer, a PLC controller, a parameter acquisition module, a parameter analysis module, an alarm module, a frame 1, a stepping motor 2, a central control rotary platform 3, an adapter plate 4, a calibration plate 5 and a wireless inclinometer 6;
the rack 1 comprises a bottom plate 1.1, a side plate 1.2 and a support plate 1.3, and is used for mounting a central control rotary platform 3; wherein the bottom plate 1.1 is connected with the side plate 1.2 and the support plate 1.3 through threads;
the internal part of the central control rotary platform 3 adopts spiral helical teeth and crossed roller bearings and is used for realizing accurate angle positioning of high-load, high-rigidity and high-output driving;
a rotating shaft of the stepping motor 2 is inserted into the tail part of the central control rotating platform 3 and is locked by a locking ring screw 3.1 reserved on the side edge; the adapter plate 4 and the calibration plate 5 are connected and locked in a mutually vertical contact mode through threads; the sunken groove 5.1 on the calibration plate is consistent with the outline of the wireless inclinometer 6; the clearance between the outline and the wireless inclinometer 6 improves the good positioning precision for the repeated installation and calibration of the wireless inclinometer 6, and the wireless inclinometer 6 is locked on the calibration plate 5 by threaded connection, so that the randomness of repeated installation is reduced;
in this embodiment, the upper computer is configured to send a pulse command to the PLC controller; the PLC is used for sending the pulse instruction to the stepping motor driver; the stepping motor driver receives the pulse instruction and then drives the stepping motor 2 to rotate, and transmits the rotating motion to the central control rotating platform 3 to drive the central control rotating platform 3 to rotate at a preset standard speed, so that the inclination of the wireless inclinometer 6 is realized;
the parameter acquisition module is a sensor group connected with the stepping motor 2 and used for acquiring operation parameter data of the stepping motor 2 and transmitting the acquired operation parameter data to the parameter analysis module for comprehensive analysis; the sensor group comprises a voltage sensor, a current sensor, a rotating speed sensor, a vibration sensor and a temperature sensor; the operation parameter data includes real-time current and real-time voltage flowing through the stepping motor 2, and the rotation speed, vibration frequency and real-time temperature of the stepping motor 2;
the rotating speed sensor is used for acquiring the actual rotating speed of the central control rotating platform 3 and transmitting the acquired actual rotating speed to the PLC controller, and the PLC controller is used for comparing the actual rotating speed with a preset standard speed; if the speed error is larger than the preset difference range, feeding back a pulse adjusting signal to an upper computer, and adjusting a pulse instruction output by the upper computer; the specific adjustment content comprises the frequency and the number of pulse transmission; the central control rotary platform 3 can rotate at a preset standard speed, so that the inclination of the wireless inclinometer 6 is realized, and the measurement error is reduced;
when the central control rotary platform 3 rotates at a preset standard speed, the parameter analysis module is used for performing early warning analysis on the operation parameter data of the stepping motor 2, and the specific analysis steps are as follows:
s1: acquiring corresponding real-time current, real-time voltage, rotating speed, vibration frequency and real-time temperature in the operation parameter data, and sequentially marking the current, the voltage, the rotating speed, the vibration frequency and the real-time temperature as DL, DY, ZS, ZD and WT; calculating an operation coefficient YX of the stepping motor 2 by using a formula YX = DL × b1+ DY × b2+ ZS × b3+ ZD × b4, wherein b1, b2, b3 and b4 are coefficient factors;
s2: establishing a first analysis array; the first analysis array comprises the operation coefficient YX and the real-time temperature WT of the stepping motor 2 acquired at the same moment; wherein, the operation coefficients YX correspond to the real-time temperatures WT one by one; establishing an operation curve of the stepping motor 2 by taking the operation coefficient YX as an independent variable and taking the real-time temperature WT as a dependent variable, and deriving the operation curve of the stepping motor 2 to obtain an operation derivative curve;
s3: acquiring a point of which the derivative is 0 in the running derivative curve and marking the point as a stationary point; calculating the time difference of the acquisition moments of the operation coefficients corresponding to the two adjacent stagnation points to obtain a stagnation and transformation time length ZT;
comparing the stay-variable time length ZT with a preset time length threshold value; if the standing variable time length ZT is more than or equal to the time length threshold value, and the real-time temperature WT1 at the time meets the condition that (RT-mu) is more than or equal to WT1 and more than or equal to (RT + mu); judging that the stepping motor 2 runs normally at the moment; wherein RT is a preset temperature threshold corresponding to the stepper motor 2; mu is a compensation factor; otherwise, the step motor 2 runs abnormally; generating an exception signal;
the parameter analysis module is used for transmitting the abnormal signal to the PLC controller, the PLC controller is used for receiving the abnormal signal and then controlling the stepping motor 2 to stop, and drives the control alarm module to give an alarm so as to remind a worker to overhaul the stepping motor 2 and avoid influencing the marking work of the wireless inclinometer 6;
the specific marking process of the wireless inclinometer 6 is as follows:
the starting, stopping and reversing of the central control rotary platform 3 are realized by a pulse instruction sent to a stepping motor driver by a PLC (programmable logic controller); the pulse finger comprises a pulse signal PUL, a direction signal DIR and an enable signal ENA;
the reduction ratio of the central control rotary platform 3 is marked as i, and the step angle is marked as alpha; marking the number of pulses sent by the PLC as M, subdividing a stepper motor driver into N in equal parts, and recording the rotation angle of the central control rotation platform 3 as theta, wherein the theta is = (alpha multiplied by M)/(i multiplied by N);
according to the relation between theta and M, the Y axis of the wireless inclinometer 6 faces the direction of the central control rotating platform 3, the wireless inclinometer 6 is calibrated to rotate 90 degrees clockwise and anticlockwise around the Y axis, then the wireless inclinometer 6 rotates 180 degrees around the Y axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; then the wireless inclinometer 6 is rotated by 90 degrees, the X axis of the wireless inclinometer 6 faces to the direction of the central control rotating platform 3, the wireless inclinometer 6 is calibrated to rotate by 90 degrees clockwise and anticlockwise around the X axis, and then rotated by 180 degrees around the X axis, and the triaxial acceleration measurement values of the accelerometer at the three positions at the moment are collected; the method comprises the steps of realizing rapid calibration of six inclination angles of an X axis and a Y axis of a single-axis turntable automatically calibrated wireless inclinometer 6, establishing an error calibration model, obtaining a three-axis acceleration calibration formula and calibrating an accelerometer;
the wireless inclinometer calibration system in the embodiment is fixed in a high and low temperature test box, a functional relation between the inclination angle error and the temperature is established, a temperature compensation formula is obtained, and calibration of temperature compensation of the wireless inclinometer 6 is realized.
According to the invention, the PLC sends pulses to the stepping motor driver, the stepping motor 2 is controlled to realize that the central control rotating platform 3 drives the calibration plate 5 to rotate, the calibration of the accelerometer and the calibration of temperature compensation are realized, the calibration efficiency of the wireless inclinometer 6 is improved, the inclination angle error of repeated calibration is reduced, and the labor intensity of repeated calibration of calibration testers is also reduced.
The above formulas are all calculated by removing dimensions and taking numerical values thereof, the formula is a formula which is obtained by acquiring a large amount of data and performing software simulation to obtain the closest real situation, and the preset parameters and the preset threshold value in the formula are set by the technical personnel in the field according to the actual situation or obtained by simulating a large amount of data.
The working principle of the invention is as follows:
a wireless inclinometer calibration system is characterized in that when in work, a rack 1 is used for mounting a central control rotary platform 3; a rotating shaft of the stepping motor 2 is inserted into the tail part of the central control rotating platform 3 and is locked by a locking ring screw 3.1 reserved on the side edge; the adapter plate 4 and the calibration plate 5 are connected and locked in a mutually vertical contact mode through threads; the sunken groove 5.1 on the calibration plate is consistent with the outline of the wireless inclinometer 6; the upper computer is used for sending a pulse instruction to the PLC; the PLC is used for sending a pulse instruction to the stepping motor driver; the stepping motor driver receives the pulse instruction and then drives the stepping motor 2 to rotate, and transmits the rotating motion to the central control rotating platform 3 to drive the central control rotating platform 3 to rotate at a preset standard speed, so that the inclination of the wireless inclinometer 6 is realized;
wherein, the rotation speed sensor is used for collecting the actual rotation speed of the central control rotating platform 3, and the PLC is used for comparing the actual rotation speed with the preset standard speed; if the speed error is larger than the preset difference range, feeding back a pulse adjusting signal to an upper computer, and adjusting a pulse instruction output by the upper computer; the specific adjustment content comprises the frequency and the number of pulse transmission; the central control rotary platform 3 can rotate at a preset standard speed, so that the inclination of the wireless inclinometer 6 is realized, and the measurement error is reduced; when the central control rotary platform 3 rotates at a preset standard speed, the parameter analysis module is used for carrying out early warning analysis on the operation parameter data of the stepping motor 2 so as to remind workers to overhaul the stepping motor 2 and avoid influencing the marking work of the wireless inclinometer 6;
the specific marking process of the wireless inclinometer 6 is as follows: the speed reduction ratio of the central control rotary platform 3 is marked as i, and the step angle is marked as alpha; marking the pulse number sent by the PLC as M, dividing a stepping motor driver into N in equal parts, and recording the rotation angle of the central control rotation platform 3 as theta, wherein the theta = (alpha multiplied by M)/(i multiplied by N); according to the relation between theta and M, the Y axis of the wireless inclinometer 6 faces the direction of the central control rotating platform 3, the wireless inclinometer 6 is calibrated to rotate 90 degrees clockwise and anticlockwise around the Y axis, then the wireless inclinometer 6 rotates 180 degrees around the Y axis, and the three-axis acceleration measurement values of the accelerometer at three positions at the moment are acquired; then the wireless inclinometer 6 is rotated by 90 degrees, the X axis of the wireless inclinometer 6 faces to the direction of the central control rotating platform 3, the wireless inclinometer 6 is calibrated to rotate by 90 degrees clockwise and anticlockwise around the X axis, and then rotated by 180 degrees around the X axis, and the triaxial acceleration measurement values of the accelerometer at the three positions at the moment are collected; the method comprises the steps of realizing rapid calibration of six inclination angles of an X axis and a Y axis of a single-axis turntable automatically calibrated wireless inclinometer 6, establishing an error calibration model, obtaining a three-axis acceleration calibration formula and calibrating an accelerometer; the wireless inclinometer calibration system is fixed in the high and low temperature test box, the functional relation between the inclination angle error and the temperature is established, a temperature compensation formula is obtained, the calibration of the wireless inclinometer 6 for temperature compensation is realized, and the calibration efficiency of the wireless inclinometer 6 is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention; in this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed; obviously, many modifications and variations are possible in light of the above teaching; the embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention; the invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A wireless inclinometer calibration system is characterized by comprising an upper computer, a PLC (programmable logic controller), a parameter acquisition module, a parameter analysis module, a rack, a stepping motor, a central control rotary platform, a transfer plate, a calibration plate and a wireless inclinometer;
the upper computer is used for sending a pulse instruction to the PLC; the PLC is used for sending a pulse instruction to the stepping motor driver so as to drive the stepping motor to rotate; the rotary motion is transmitted to the central control rotary platform, and the central control rotary platform is driven to rotate at a preset standard speed, so that the inclination of the angle of the wireless inclinometer is realized;
when the central control rotating platform rotates at a preset standard speed, the parameter analysis module is used for carrying out early warning analysis on the operation parameter data of the stepping motor and reminding workers to overhaul the stepping motor so as to avoid influencing the marking work of the wireless inclinometer;
the specific marking process of the wireless inclinometer comprises the following steps:
firstly, the Y axis of the wireless inclinometer faces the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate 90 degrees clockwise and anticlockwise around the Y axis respectively, then the wireless inclinometer rotates 180 degrees around the Y axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; then the wireless inclinometer is rotated by 90 degrees, the X axis of the wireless inclinometer faces to the direction of the central control rotating platform, the wireless inclinometer is calibrated to rotate by 90 degrees clockwise and anticlockwise around the X axis, and then rotated by 180 degrees around the X axis, and the triaxial acceleration measurement values of the accelerometer at three positions at the moment are acquired; the method comprises the steps of realizing rapid calibration of six inclination angles of an X axis and a Y axis of the single-axis turntable automatically calibrating the wireless inclinometer, establishing an error calibration model, obtaining a three-axis acceleration calibration formula and calibrating the accelerometer;
fixing the wireless inclinometer calibration system in a high and low temperature test box, establishing a functional relation between the inclination angle error and the temperature to obtain a temperature compensation formula, and realizing the calibration of the wireless inclinometer temperature compensation.
2. The system for calibrating a wireless inclinometer according to claim 1, wherein the method for acquiring the rotation angle of the central control rotating platform comprises the following steps:
marking the reduction ratio of the central control rotary platform as i, and marking the step angle as alpha; marking the pulse number sent by the PLC as M, dividing the stepper motor driver into N in equal parts, and recording the rotation angle of the central control rotation platform as theta, wherein the theta is = (alpha multiplied by M)/(i multiplied by N).
3. The system for calibrating a wireless inclinometer according to claim 1, wherein the central control rotary platform performs rotary motion at a preset standard speed, specifically:
acquiring the actual rotating speed of the centralized control rotating platform through a rotating speed sensor;
the PLC is used for comparing the actual rotating speed with a preset standard speed; if the speed error is larger than the preset difference range, feeding back a pulse adjusting signal to an upper computer, and adjusting a pulse instruction output by the upper computer; the specific adjustment content comprises the frequency and the number of pulse transmission; so that the central control rotary platform rotates at a preset standard speed.
4. The system for calibrating a wireless inclinometer according to claim 1, wherein the parameter acquisition module is a sensor group connected with the stepping motor and used for acquiring operation parameter data of the stepping motor and transmitting the acquired operation parameter data to the parameter analysis module for comprehensive analysis; the sensor group comprises a voltage sensor, a current sensor, a rotating speed sensor, a vibration sensor and a temperature sensor; the operational parameter data includes real-time current, real-time voltage, and rotational speed, vibration frequency, and real-time temperature of the stepper motor flowing through the stepper motor.
5. The system for calibrating a wireless inclinometer according to claim 4, wherein the specific analysis steps of the parameter analysis module are as follows:
s1: acquiring corresponding real-time current, real-time voltage, rotating speed, vibration frequency and real-time temperature in the operation parameter data, and sequentially marking the current, the voltage, the rotating speed, the vibration frequency and the real-time temperature as DL, DY, ZS, ZD and WT;
calculating an operation coefficient YX of the stepping motor by using a formula YX = DL × b1+ DY × b2+ ZS × b3+ ZD × b4, wherein b1, b2, b3 and b4 are coefficient factors;
s2: establishing a first analysis array; the first analysis array comprises an operation coefficient YX and a real-time temperature WT of the stepping motor which are obtained at the same moment; establishing an operation curve of the stepping motor by taking the operation coefficient YX as an independent variable and the real-time temperature WT as a dependent variable, and deriving the operation curve to obtain an operation derivative curve;
s3: acquiring a point of which the derivative is 0 in the running derivative curve and marking the point as a stationary point; calculating the time difference of the acquisition moments of the operation coefficients corresponding to the two adjacent stagnation points to obtain a stagnation and transformation time length ZT;
comparing the standing time length ZT with a preset time length threshold value; if the standing-variable time length ZT is more than or equal to the time length threshold, and the real-time temperature WT1 at the time meets the condition that (RT-mu) is more than or equal to WT1 and more than or equal to (RT + mu); judging that the stepping motor operates normally at the moment; otherwise, the step motor operates abnormally; generating an abnormal signal; wherein RT is a preset temperature threshold corresponding to the stepping motor; mu is a compensation factor; the parameter analysis module is used for transmitting the abnormal signal to the PLC controller, the PLC controller is used for receiving the abnormal signal and then controlling the stepping motor to stop, and the drive control alarm module gives an alarm to remind a worker to overhaul the stepping motor.
6. The wireless inclinometer calibration system according to claim 1, wherein the start, stop and commutation of the central control rotary platform are realized by a pulse command sent to a stepper motor driver by a PLC controller; the pulse finger includes a pulse signal PUL, a direction signal DIR, and an enable signal ENA.
7. The wireless inclinometer calibration system according to claim 1, wherein the rack comprises a bottom plate, side plates and a support plate for mounting a rotating control platform; spiral helical teeth and crossed roller bearings are adopted in the central control rotary platform; and a rotating shaft of the stepping motor is inserted into the tail part of the rotary control platform and is locked by a locking ring screw reserved on the side edge.
8. The wireless inclinometer calibration system according to claim 7, wherein the adapter plate and the calibration plate are locked by a threaded connection in a mutually perpendicular contact manner; the sunken groove on the calibration plate is consistent with the outline of the wireless inclinometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210980447.4A CN115060294A (en) | 2022-08-16 | 2022-08-16 | Wireless inclinometer calibration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210980447.4A CN115060294A (en) | 2022-08-16 | 2022-08-16 | Wireless inclinometer calibration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116938051A (en) * | 2023-09-19 | 2023-10-24 | 山东乐康电器科技有限公司 | High-precision intelligent constant-rotation-speed source and implementation method thereof |
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| CN116938051A (en) * | 2023-09-19 | 2023-10-24 | 山东乐康电器科技有限公司 | High-precision intelligent constant-rotation-speed source and implementation method thereof |
| CN116938051B (en) * | 2023-09-19 | 2023-12-19 | 山东乐康电器科技有限公司 | High-precision intelligent constant-rotation-speed source and implementation method thereof |
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