CN115290237A - Circuit logic and data processing method for improving detection precision - Google Patents
Circuit logic and data processing method for improving detection precision Download PDFInfo
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- CN115290237A CN115290237A CN202210952331.XA CN202210952331A CN115290237A CN 115290237 A CN115290237 A CN 115290237A CN 202210952331 A CN202210952331 A CN 202210952331A CN 115290237 A CN115290237 A CN 115290237A
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- 238000001514 detection method Methods 0.000 title claims abstract description 94
- 238000003672 processing method Methods 0.000 title claims abstract description 16
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/28—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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Abstract
The invention discloses a circuit logic and data processing method for improving detection precision, which belongs to the technical field of torque detection, and comprises the steps of constructing detection equipment, acquiring a tool to be detected, and connecting the tool to be detected with the detection equipment according to normal use requirements; detecting deformation and angle change of a torsion shaft of equipment, performing corresponding data acquisition through the equipment, setting a torque detection curve and an angle change curve according to the obtained torque value and angle value, and judging whether the tool to be detected is qualified; comprehensively acquiring a torque value, an angle value and curvature change data, outputting a final high-precision torque tool detection report, and outputting a calibration adjustment suggestion when the detection is unqualified; the dynamic torque testing mode is adopted to simulate the screwing process, angle measurement is added in the dynamic testing process, the angle is measured with the magnetic device and the chip at high precision, torque testing is assisted, double verification is carried out, a false test result is prevented, and the detection precision and reliability are improved.
Description
Technical Field
The invention belongs to the technical field of torque detection, and particularly relates to a circuit logic and data processing method for improving detection precision.
Background
The low-end torque type tool adopts a mechanical structure, the high-end torque type tool adopts a strain gauge structure, torque change is converted into an electric signal, and a program at the rear end is amplified and processed to finally obtain high-precision torque data. This method is highly accurate, and therefore, it is necessary to periodically perform inspection and calibration of the tool, and correct the measurement result of the tool in the program after obtaining the data. At present, static measurement is generally adopted for a torque tester for testing and calibrating a tool, namely, the precision of detection equipment is higher than that of a torque tool, so that calibration and calibration are carried out, but in the actual use process, the torque tool is a process of dynamic torque change in the screwing process, and the mode is not accurate enough.
The prior technical scheme in the market at present is that a physical simulation link element is matched with a dynamic torque tester, a measurement result can only display a final average value, and part of schemes have angle tests, but adopt grating detection, have low precision, can not be linked with torque data, have no special software for analysis and data output, and have lower functions.
The present invention thus provides a circuit logic and data processing method that improves detection accuracy.
Disclosure of Invention
In order to solve the problems of the scheme, the invention provides a circuit logic and a data processing method for improving the detection precision.
The purpose of the invention can be realized by the following technical scheme:
a circuit logic and data processing method for improving detection precision comprises the following steps:
the method comprises the following steps: constructing detection equipment, acquiring a tool to be detected, and connecting the tool to be detected with the detection equipment according to normal use requirements;
step two: in a real use environment, deformation and angle change of a torsion shaft of the detection equipment occur, and corresponding data acquisition including a torque value and an angle value is carried out through the detection equipment;
step three: setting a torque detection curve and an angle change curve according to the obtained torque value and angle value, and judging whether the tool to be detected is qualified or not according to the set torque detection curve and angle change curve;
step four: and comprehensively acquiring the torque value, the angle value and the curvature change data, outputting a final high-precision torque tool detection report, and outputting a calibration adjustment suggestion when the detection is unqualified.
Furthermore, the detection device comprises a shell, wherein an installation chamber penetrating through the shell is arranged on the shell, a torsion shaft is arranged in the installation chamber, a conductive sliding ring is sleeved on the torsion shaft, an electric brush matched with the conductive sliding ring is fixedly connected in the installation chamber, a magnetic ring is fixedly connected on the torsion shaft, and an angle induction chip corresponding to the magnetic ring is arranged in the installation chamber; two opposite strain gauges are arranged on the surface of the torsion shaft.
Further, the two strain gauges are connected in a bridge mode.
Furthermore, the strain gauge comprises a sensitive grid, a lead, an adhesive, a covering layer and a substrate, wherein the sensitive grid is arranged on the substrate, the lead is connected with the sensitive grid, and the covering layer is connected to the surface of the substrate through the adhesive.
Further, the sensitive grid is a monofilament or a grid-like body made of a metal wire or a semiconductor material.
Furthermore, the magnetic ring is provided with a fixed magnetic pole pair number, the magnetic density is distributed in a sine mode in the space, and a pair of magnetic poles corresponds to a complete sine wave.
Further, the method for performing corresponding data acquisition through the detection device comprises the following steps:
converting the strain quantity into resistance variable quantity through a sensitive grid of the strain gauge, leading out an electric signal through a lead wire, and transmitting the electric signal to a circuit board; the circuit board is provided with an amplifying circuit and a processing circuit, the amplifying circuit amplifies and converts the electric signal, and the processing circuit matches with the corresponding coefficient to output an accurate torque numerical value;
the magnetic poles of the magnetic rings on the torsion shaft change, and the angle sensing chip detects the change of the magnetic poles, converts the change of the magnetic poles into an electric signal and outputs the electric signal to the circuit board; the processing circuit converts the electric signal into an electric angle value, calculates and outputs the angle value.
Further, the method for calculating and outputting the angle value comprises the following steps:
and if the number of pole pairs of the magnetic ring is p, p complete sine waves exist in the whole circumference, the space geometric angle of the circumference is called a mechanical angle, the angle corresponding to the magnetic field distribution on the circumference is called an electrical angle, the relationship between the two angles is electrical angle = p multiplied by mechanical angle, the electrical angle value is obtained, the change of the mechanical angle is calculated through the obtained electrical angle data, and the angle value of the torsion shaft is obtained in real time.
Further, the method for judging whether the tool to be detected is qualified according to the set torque detection curve and the angle change curve comprises the following steps:
the method comprises the steps of obtaining theoretical standard numerical values of a tool to be detected, wherein the theoretical standard numerical values comprise standard torque values, standard angle values and standard curvature changes, obtaining error allowable ranges corresponding to the theoretical standard numerical values, identifying corresponding acquisition torque values, acquisition angle values and acquisition curvature changes through a torque detection curve and an angle change curve, carrying out corresponding comparison, judging that the tool to be detected is qualified when the acquisition torque values, the acquisition angle values and the acquisition curvature changes are all within the error allowable ranges, and judging that the tool is unqualified when any one of the acquisition torque values, the acquisition angle values and the acquisition curvature changes exceeds the corresponding error allowable ranges.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts a dynamic torque test mode to simulate the screwing process, obtains a torque curve of the tool after processing, displays the precision level of the tool after comparing with the standard curve, obtains a correction coefficient, also adds angle measurement in the dynamic test process, measures the angle with high precision by utilizing a magnetic device and a chip, assists the torque test, performs double verification, prevents a false test result, and improves the detection precision and reliability.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a cross-sectional view of the detecting apparatus of the present invention;
FIG. 3 is a schematic diagram of a strain gage according to the present invention;
FIG. 4 is a schematic diagram of the torque detection principle of the present invention.
In the figure: 1. a sensitive grid; 2. a lead wire; 3. a binder; 4. a cover layer; 5. a substrate; 6. a conductive slip ring; 7. an electric brush; 8. a magnetic ring; 9. and (4) twisting the shaft.
Detailed Description
The technical solutions 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.
The prior art scheme is developed from simulating actual use conditions, a dynamic tightening process is simulated in a static torque test mode, and finally an average value is obtained. The whole testing process has breakpoints, and the mechanical simulation connecting piece is adopted, so that the influence of factors such as abrasion, manual control and the like can be caused, and the precision of a testing numerical value is low. Without the angular test to assist in verifying the torque, mechanical jamming may occur, with the torque shown in place, but not actually tightened. The angle testing function of the improved part of technical schemes is provided, but the angle testing mode of the grating is generally adopted, the precision is not high enough, the software support is lacked, and the software analysis of the testing process and the data can not be carried out.
The invention adopts the high-precision strain gauge which is sensitive to the deformation of materials, optimally designs the product structure and the circuit board assembly aiming at the high-precision strain gauge, firstly leads the equipment to achieve high precision from the physical detection, and then can automatically adapt to the most appropriate amplification factor through a software algorithm, so that the detection result is far higher than the requirement. For angle testing, the angle detection can reach +/-1 degree through induction of the magnetic ring and the professional chip. The software end has various preset value selections, for example, the condition that the torque reaches the standard and the angle does not reach the standard still can judge that the torque does not reach the standard, and simultaneously, the torque and angle curves of the whole dynamic detection process can be displayed, and the performance level of the tool can be completely displayed. Through the combination of software and hardware, the external influence factor of torque detection is reduced to the minimum, thereby achieving the purpose of accurate detection.
As shown in fig. 1 to 4, a circuit logic and data processing method for improving detection accuracy includes:
the method comprises the following steps: constructing detection equipment, acquiring a tool to be detected, and connecting the tool to be detected with the detection equipment according to normal use requirements;
the connection is carried out according to the normal use requirement, namely according to the use method in the real use environment.
The structure schematic diagram of the detection device is shown in fig. 2 to 3, the detection device comprises a shell, an installation chamber penetrating through the shell is arranged on the shell, a torsion shaft 9 is arranged in the installation chamber, a conductive slip ring 6 is sleeved on the torsion shaft 9, an electric brush 7 matched with the conductive slip ring 6 is fixedly connected in the installation chamber, a magnetic ring 8 is fixedly connected on the torsion shaft 9, and an angle induction chip corresponding to the magnetic ring 8 is arranged in the installation chamber; the surface of the torsion shaft 9 is provided with two opposite strain gauges, namely, the two opposite strain gauges are symmetrically arranged on the torsion shaft 9 and are connected in a bridge manner.
The strain gauge comprises a sensitive grid 1, a lead 2, an adhesive 3, a covering layer 4 and a substrate 5, wherein the sensitive grid 1 is arranged on the substrate 5, the lead 2 is connected with the sensitive grid 1, and the covering layer 4 is connected to the surface of the substrate 5 through the adhesive 3.
The sensitive grid 1 is a monofilament or grid-like body made of metal wires or semiconductor materials.
The magnetic ring 8 is provided with a fixed magnetic pole pair number, the magnetic density is distributed in a sine mode in space, and a pair of magnetic poles correspond to a complete sine wave which is equivalent to 360 degrees;
step two: in a real use environment, deformation and angle change of a torsion shaft 9 of the detection equipment occur, and corresponding data acquisition including a torque value and an angle value is carried out through the detection equipment;
the method for carrying out corresponding data acquisition through the detection equipment comprises the following steps:
the strain is converted into resistance variation through a sensitive grid 1 of the strain gauge, and then an electric signal is led out through a lead 2 and transmitted to a circuit board; the circuit board is provided with an amplifying circuit and a processing circuit, the amplifying circuit amplifies and converts the electric signal, and the processing circuit matches with the corresponding coefficient to output an accurate torque numerical value;
the magnetic poles of the magnetic rings 8 on the torsion shafts 9 change, and the angle sensing chips are converted into electric signals to be output after detecting the change of the magnetic poles and are transmitted to the circuit board; the processing circuit converts the electric signal into an electric angle value, calculates and outputs the angle value.
The principle that the processing circuit is matched with the torque value with accurate output corresponding to the coefficient is as follows:
different curves can be simulated according to the size and the model of the torsion shaft 9 through the existing related software, the curve with the most reasonable section and the highest precision in the curve is selected, the section is amplified, the corresponding amplification coefficient is set, the average value of multiple calculation is taken, the principle that the matching of the corresponding coefficient and the output of the accurate torque value can be realized through the existing technology, the existing related software is provided, and therefore detailed description is not carried out.
The method for calculating and outputting the angle value comprises the following steps:
if the pole pair number of the magnetic ring 8 is p, p complete sine waves are arranged on the whole circumference, which is equivalent to p multiplied by 360 degrees; from a geometrical point of view, the entire circumference is only 360 °; the space geometric angle of the circumference is called as a mechanical angle, the angle corresponding to the magnetic field distribution on the circumference is called as an electrical angle, the relationship between the two is that the electrical angle = p multiplied by the mechanical angle, the electrical angle value is obtained, the change of the mechanical angle is calculated through the obtained electrical angle data, and then the angle value of the torsion shaft is obtained in real time.
Step three: setting a torque detection curve and an angle change curve according to the obtained torque value and angle value, and judging whether the tool to be detected is qualified or not according to the set torque detection curve and angle change curve;
the torque detection curve and the angle change curve are set according to the obtained torque value and the angle value, and the corresponding torque detection curve and the corresponding angle change curve can be drawn according to the torque value and the angle value which are collected in real time through the existing drawing software, so that detailed description is omitted.
The method for judging whether the tool to be detected is qualified according to the set torque detection curve and the angle change curve comprises the following steps:
the method comprises the steps of obtaining theoretical standard numerical values of a tool to be detected, wherein the theoretical standard numerical values comprise standard torque values, standard angle values and standard curvature changes, obtaining error allowable ranges corresponding to the theoretical standard numerical values, identifying corresponding acquisition torque values, acquisition angle values and acquisition curvature changes through a torque detection curve and an angle change curve, carrying out corresponding comparison, judging that the tool to be detected is qualified when the acquisition torque values, the acquisition angle values and the acquisition curvature changes are all within the error allowable ranges, and judging that the tool is unqualified when any one of the acquisition torque values, the acquisition angle values and the acquisition curvature changes exceeds the corresponding error allowable ranges.
Step four: and comprehensively acquiring the torque value, the angle value and the curvature change data, outputting a final high-precision torque tool detection report, and outputting a calibration adjustment suggestion when the detection is unqualified.
In one embodiment, the method of outputting the final high-precision torque tool test report may be directly generated using existing test report generation methods, since the more sophisticated test report generation software currently available may be used directly when it is satisfactory.
In another embodiment, a method of outputting a final high-precision torque tool detection report includes:
the method comprises the steps of setting a detection report standard template, identifying data filling items in the detection report standard template, wherein the data filling items are items needing data filling, such as detection data items of a torque detection curve, an angle change curve and the like, associating corresponding data supplement units according to the identified data filling items, wherein the data supplement units are used for identifying and extracting corresponding data after a tool to be detected is detected, supplementing the extracted data into the corresponding data filling items, and generating a final high-precision torque tool detection report after all the data supplement items are supplemented.
The standard template of the detection report is set by corresponding experts or technical management personnel according to the requirements of the detection report, for example, the standard template comprises content parts such as detection tool information, detection data, qualified detection comments, headers, text formats and the like, and is set and adjusted according to the requirements of the actual detection report.
The working method of the exemplary data supplementing unit comprises the steps of supplementing a torque detection curve, identifying an extracted torque detection curve item according to preset requirements after detection is finished, automatically acquiring the torque detection curve from detection data, and directly supplementing the acquired torque detection curve to a part needing to be filled in a corresponding associated data filling item.
When the detection is unqualified, the method for outputting the calibration adjustment suggestion comprises the following steps:
setting a plurality of positioning vectors according to the standard torque value, the standard angle value and the standard curvature change; obtaining detection difference data, converting the detection difference data into a matching vector, calculating the similarity between the matching vector and the positioning vector, selecting the corresponding positioning vector as a target vector according to the calculated similarity, integrating the target vector, the matching vector and the corresponding similarity into calibration input data, establishing a calibration model, inputting the calibration input data into the calibration model, and obtaining a corresponding calibration adjustment suggestion.
The setting method of the positioning vector comprises the following steps: acquiring a difference value interval which may exist, wherein the difference value of the acquisition torque value, the acquisition angle value and the acquisition curvature change which exceed the corresponding error allowable range can be a negative value; according to the difference interval and the corresponding calibration adjustment principle, a plurality of positioning vectors are set by the expert group, one positioning vector represents the vectors in one area, namely the positioning vectors are not particularly many, the area combination can be determined according to the corresponding difference interval, and each area is provided with one positioning vector as a representative.
The detected difference data is the difference of the detected data exceeding the error allowable range of the theoretical standard value.
Converting the detected difference data into a matching vector, identifying three corresponding differences, and establishing the matching vector according to the differences.
The calibration model is established based on a CNN network or a DNN network, corresponding calibration adjustment suggestions are set through calibration input data, and a corresponding training set is established for training.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (9)
1. A circuit logic and data processing method for improving detection precision is characterized by comprising the following steps:
the method comprises the following steps: constructing detection equipment, acquiring a tool to be detected, and connecting the tool to be detected with the detection equipment according to normal use requirements;
step two: in a real use environment, deformation and angle change of a torsion shaft (9) of the detection equipment occur, and corresponding data acquisition including a torque value and an angle value is carried out through the detection equipment;
step three: setting a torque detection curve and an angle change curve according to the obtained torque value and angle value, and judging whether the tool to be detected is qualified or not according to the set torque detection curve and angle change curve;
step four: and comprehensively acquiring the torque value, the angle value and the curvature change data, outputting a final high-precision torque tool detection report, and outputting a calibration adjustment suggestion when the detection is unqualified.
2. The circuit logic and data processing method for improving the detection precision is characterized in that the detection device comprises a housing, a mounting chamber penetrating through the housing is arranged on the housing, a torsion shaft (9) is arranged in the mounting chamber, a conductive slip ring (6) is sleeved on the torsion shaft (9), an electric brush (7) matched with the conductive slip ring (6) is fixedly connected in the mounting chamber, a magnetic ring (8) is fixedly connected on the torsion shaft (9), and an angle sensing chip corresponding to the magnetic ring (8) is arranged in the mounting chamber; two opposite strain gauges are arranged on the surface of the torsion shaft (9).
3. The circuit logic and data processing method for improving detection accuracy of claim 2, wherein the two strain gauges are connected in a bridge manner.
4. The circuit logic and data processing method for improving the detection accuracy is characterized in that the strain gauge comprises a sensitive grid (1), a lead (2), an adhesive (3), a covering layer (4) and a substrate (5), wherein the sensitive grid (1) is arranged on the substrate (5), the lead (2) is connected with the sensitive grid (1), and the covering layer (4) is connected to the surface of the substrate (5) through the adhesive (3).
5. A circuit logic and data processing method for improving detection accuracy according to claim 4, characterized in that the sensitive grid (1) is a monofilament or a grid made of metal wire or semiconductor material.
6. A method as claimed in claim 2, wherein the magnetic ring (8) has a fixed number of pole pairs, the magnetic density is distributed sinusoidally in space, and a pair of poles corresponds to a complete sine wave.
7. The circuit logic and data processing method for improving detection accuracy according to claim 5 or 6, wherein the method for performing corresponding data acquisition by the detection device comprises:
the strain is converted into resistance variation through a sensitive grid (1) of the strain gauge, and then an electric signal is led out through a lead (2) and transmitted to a circuit board; the circuit board is provided with an amplifying circuit and a processing circuit, the amplifying circuit amplifies and converts the electric signal, and the processing circuit matches with the corresponding coefficient to output an accurate torque numerical value;
the magnetic poles of the magnetic rings (8) on the torsion shaft (9) change, and the angle sensing chip detects the change of the magnetic poles, converts the change into an electric signal and outputs the electric signal, and transmits the electric signal to the circuit board; the processing circuit converts the electric signal into an electric angle value, calculates and outputs the angle value.
8. The circuit logic and data processing method for improving detection accuracy of claim 7, wherein the method for calculating and outputting the angle value comprises:
and if the number of pole pairs of the magnetic ring (8) is p, p complete sine waves exist in the whole circumference, the space geometric angle of the circumference is called as a mechanical angle, the angle corresponding to the magnetic field distribution on the circumference is called as an electrical angle, the relationship between the two angles is electrical angle = p multiplied by mechanical angle, the electrical angle value is obtained, the change of the mechanical angle is calculated through the obtained electrical angle data, and the angle value of the torsion shaft (9) is obtained in real time.
9. The circuit logic and data processing method for improving the detection accuracy according to claim 1, wherein the method for judging whether the tool to be detected is qualified according to the set torque detection curve and the set angle change curve comprises the following steps:
the method comprises the steps of obtaining theoretical standard numerical values of a tool to be detected, wherein the theoretical standard numerical values comprise a standard torque value, a standard angle value and a standard curvature change, obtaining an error allowable range corresponding to the theoretical standard numerical values, identifying corresponding acquisition torque values, acquisition angle values and acquisition curvature changes through a torque detection curve and an angle change curve, carrying out corresponding comparison, judging that the tool to be detected is qualified when all the acquisition torque values, the acquisition angle values and the acquisition curvature changes are within the error allowable range, and judging that the tool to be detected is unqualified when any one of the acquisition torque values, the acquisition angle values and the acquisition curvature changes exceeds the corresponding error allowable range.
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