CN111780920A - Method for calibrating dynamic torque sensor on line in situ - Google Patents
Method for calibrating dynamic torque sensor on line in situ Download PDFInfo
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- CN111780920A CN111780920A CN202010650049.7A CN202010650049A CN111780920A CN 111780920 A CN111780920 A CN 111780920A CN 202010650049 A CN202010650049 A CN 202010650049A CN 111780920 A CN111780920 A CN 111780920A
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- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
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Abstract
The invention discloses a method for calibrating a dynamic torque sensor in situ on line, and relates to the technical field of torque sensor calibration. The main technical scheme of the invention is as follows: arranging a magnetoelectric torque sensor on a shaft of a torque sensor to be measured, and connecting the torque sensor to be measured between a rotation driving device and a load device; starting the rotation driving device, setting a preset torque value for the rotation driving device, and recording a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori(ii) a Using the formula Δ M ═ Mi‑M0Obtaining an error value delta M of the measured torque sensor; wherein the accuracy of the magnetoelectric torque sensor is greater than the accuracy of the measured torque sensor. The invention solves the technical problem that the torque sensor cannot be dynamically calibrated.
Description
Technical Field
The invention relates to the technical field of torque sensor calibration, in particular to a method for calibrating a dynamic torque sensor in situ on line.
Background
The torque sensor is a precision measuring instrument for measuring various torques, rotating speeds and mechanical powers. The device has wide application range and is mainly used for detecting the output torque and power of rotary power equipment such as a motor, an engine, an internal combustion engine and the like; detecting the torque and power of a fan, a water pump, a gear box and a torque wrench; detecting the torque and power in railway locomotives, automobiles, tractors, airplanes, ships and mining machinery; detecting torque and power in the sewage treatment system; used in process industry and process industry testing.
Since the torque sensor is a precise measurement instrument, the torque sensor needs to be calibrated periodically. At present, the calibration of the torque sensor is mainly static calibration, that is, the torque sensor needs to be detached from the device and is calibrated by static clamping. The static calibration mode is seriously inconsistent with the actual use condition, and the dynamic working actual performance under the working condition (working condition) is difficult to reflect really, particularly when the rotating speed of the torque is higher, the technical performance of the torque sensor during static calibration is greatly different from the actual dynamic use state.
The above technical problem needs to be further solved.
Disclosure of Invention
In view of this, the present invention provides a method for calibrating a dynamic torque sensor in situ on line, and mainly aims to solve the technical problem that the torque sensor cannot be dynamically calibrated.
The invention provides a method for calibrating a dynamic torque sensor in situ on line, which comprises the following steps:
arranging a magnetoelectric torque sensor on a shaft of a torque sensor to be measured, and connecting the torque sensor to be measured between a rotation driving device and a load device;
starting the rotation driving device, setting a preset torque value for the rotation driving device, and recording a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori；
Using the formula Δ M ═ Mi-M0Obtaining an error value delta M of the measured torque sensor;
wherein the accuracy of the magnetoelectric torque sensor is greater than the accuracy of the measured torque sensor.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Specifically, the rotation driving device is set to a plurality of different torque values, and the reading M of the magnetoelectric torque sensor is obtained according to detection0And a reading M of the measured torque sensori；
And calculating an error value delta M of the measured torque sensor under the condition of a plurality of different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor.
Specifically, the rotation driving device is set to 3 different torque values, and the reading M of the magnetoelectric torque sensor is obtained according to detection0And a reading M of the measured torque sensori；
And calculating an error value delta M of the measured torque sensor under the condition of 3 different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor.
Specifically, in the case of obtaining the torque value output by the rotation driving device of the error value Δ M, the reading M of the magnetoelectric torque sensor is read a plurality of times0iAccording to the formula
Calculating torque reference value M'0；
And reading the reading M of the torque sensor to be measured once every preset time under the condition of obtaining the torque value output by the rotation driving device of the error value delta MiReading the readings M of the torque sensor to be measured for a plurality of timesiAnd calculating the reading M of the torque sensor to be measured for a plurality of timesiIs arithmetic mean of
In particular, when
According to the formula
Obtaining the repeatability S of the measured torque sensorn；
Wherein the MPE is a maximum allowable error value of the measured torque sensor.
In particular, when
According to the formula
Obtaining the repeatability S of the measured torque sensorn；
Wherein the MPE is a maximum allowable error value of the measured torque sensor.
Specifically, in the case of obtaining the torque value output by the rotation driving device of the error value Δ M, the reading M of the magnetoelectric torque sensor is read ten times0iCalculating the torque reference value M'0。
Specifically, reading M of the torque sensor to be measured is taken once every 3 minutesiAnd reading the reading M of the torque sensor to be measured 10 timesiTo calculate the reading M of the torque sensor to be measurediIs arithmetic mean of
Specifically, a connecting shaft between the torque sensor to be measured and the rotation driving device and the load device is in a horizontal state or a vertical state.
By the technical scheme, the method for calibrating the dynamic torque sensor in situ on line at least has the following advantages:
the method for calibrating the dynamic torque sensor in situ on line provided by the embodiment of the invention can perform calibration work when the torque sensor to be measured is in situ, namely can keep the connection state of the torque sensor to be measured and the rotation driving equipment, and perform calibration work in dynamic work. The calibration result can truly reflect the dynamic working actual performance of the measured torque sensor under the working condition.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic flow chart of a method for calibrating a dynamic torque sensor in situ on line according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of a method for calibrating a dynamic torque sensor in situ on line according to the present invention, with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a method for calibrating a dynamic torque sensor in situ on line, which comprises the following steps of:
101. the magnetoelectric torque sensor is arranged on a shaft of the torque sensor to be measured, and the torque sensor to be measured is connected between the rotation driving device and the load device.
Specifically, the connection state of the torque sensor to be measured, the rotation driving device and the load device can be maintained, namely the torque sensor to be measured does not need to be detached from the device, and then the magnetoelectric torque sensor is directly arranged on a shaft of the torque sensor to be measured; or, set up a level or vertical workstation, will rotate the relative setting of drive arrangement and load equipment, then will be surveyed torque sensor and connect between the two to make three's connecting axle be in same straight line, and then can open the test work who is surveyed torque sensor.
When the rotation driving equipment has a torque adjusting function, namely the output torque value is adjustable, the output torque value can be adjusted by directly controlling the rotation driving equipment; or a controller for controlling the rotation driving device can be additionally arranged, and the output torque value of the rotation driving device is controlled through the controller, so that the accurate dynamic calibration of the composite actual working condition is carried out.
The specific setting mode of the magnetoelectric torque sensor is the same as the using mode of the magnetoelectric torque sensor, and the amorphous alloy thin strip is arranged on a shaft of the torque sensor to be measured, and then the induction end of the magnetoelectric torque sensor is correspondingly installed. The working principle of the magnetoelectric torque sensor is known to the skilled person, and the embodiment of the invention is not described in detail.
102. Starting the rotation driving device, setting a preset torque value for the rotation driving device, and recording a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori。
Specifically, the installation work of the torque sensor to be measured and the magnetoelectric torque sensor is completed by step 101. The detection operation may be started after the rotary drive device is set to a predetermined torque value in step 102, which may be a value conventionally used for calibrating the output of the torque sensor under test, or may be a value output under actual operating conditions of the rotary drive device as a predetermined torque value, or may be set according to a torque value in an operating environment in which the torque sensor under test is to be applied or is being applied.
103. Using the formula Δ M ═ Mi-M0Obtaining an error value delta M of the measured torque sensor; wherein the accuracy of the magnetoelectric torque sensor is greater than the accuracy of the measured torque sensor.
Specifically, it should be noted that, in order to calibrate the measured torque sensor using the magnetoelectric torque sensor, that is, to obtain an error value of the measured torque sensor, the accuracy of the magnetoelectric torque sensor must be higher than that of the measured torque sensor, and before the calibration operation is performed, it is necessary to determine in advance whether the operating state of the magnetoelectric torque sensor is normal.
Furthermore, the torque value of the magnetoelectric torque sensor and the torque value of the measured torque sensor can be obtained through the steps of 101-103, and the error value Δ M of the measured torque sensor can be obtained through the difference between the torque value of the magnetoelectric torque sensor and the torque value of the measured torque sensor.
The method for calibrating the dynamic torque sensor in situ on line provided by the embodiment of the invention can perform calibration work when the torque sensor to be measured is in situ, namely can keep the connection state of the torque sensor to be measured and the rotation driving equipment, and perform calibration work in dynamic work. The calibration result can truly reflect the dynamic working actual performance of the measured torque sensor under the working condition.
In a specific implementation, the rotation driving device is set to a plurality of different torque values, and the reading M of the magnetoelectric torque sensor is obtained according to detection0And a reading M of the measured torque sensori(ii) a And calculating an error value delta M of the measured torque sensor under the condition of a plurality of different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor.
Specifically, if only the torque value output by a single rotation driving device is set to calibrate the torque sensor to be measured, a dead zone of measurement is likely to occur, that is, the torque sensor to be measured may be relatively accurately measured at a certain torque value or within a certain range of torque values. Therefore, as described above, the rotation driving device can be set to a plurality of different torque values, such as several torque values in a representative actual operation, and then the calculation of the error value of the reading is performed, so that when the maximum value of the error value is selected as the error value Δ M of the torque sensor to be measured, the accuracy of the error value Δ M obtained by detection can be ensured, and the error value Δ M can be prevented from falling into the measurement blind area.
The plurality of torque values of the rotary driving device may be discontinuous and may be spaced at the same ratio.
Preferably, the rotation driving apparatus may be set to 3 different torque values, and the magnetoelectric type may be obtained in correspondence with detectionReading M of torque sensor0And a reading M of the measured torque sensori(ii) a And calculating an error value delta M of the measured torque sensor under the condition of 3 different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor. The 3 different torque values are only preferred selections in one week, and an implementer may set 5 or more different torque values according to actual situations, which is not specifically limited in the embodiments of the present invention.
In a specific implementation, the reading M of the magnetoelectric torque sensor is read for a plurality of times under the condition of obtaining the torque value output by the rotation driving device of the error value Delta M0iAccording to the formula
Calculating torque reference value M'0；
And reading the reading M of the torque sensor to be measured once every preset time under the condition of obtaining the torque value output by the rotation driving device of the error value delta MiReading the readings M of the torque sensor to be measured for a plurality of timesiAnd calculating the reading M of the torque sensor to be measured for a plurality of timesiIs arithmetic mean of
Specifically, after the detection is performed by setting a plurality of different torque values and comparing the error value Δ M of the maximum measured torque sensor, further detection can be performed while continuing with the torque value. That is, as described above, by continuously or discontinuously reading the readings M of the plurality of magnetoelectric torque sensors in time in the case of the torque value output by the rotation drive apparatus at which the error value Δ M is obtained0iAnd by the formula
Calculating an average value of the magnetoelectric torque sensors as a torque reference value M'0. Torque reference value M 'thus obtained'0Not a single pointThe value is an average value, and is more suitable and more accurate as a torque reference value.
Wherein the readings M of the plurality of measured torque sensors are read every preset intervaliAfter calculation of the arithmetic mean, the reading M is obtainediAnd can represent the reading condition under the condition of obtaining the output torque value of the rotary driving device with a larger error value delta M, and reflects the general reading condition of the measured torque sensor under the loading of the torque value.
Further, reading M of a plurality of torque sensors to be measurediPreferably, the reading M of the torque sensor under test is taken every 3 minutesiAnd reading the reading M of the torque sensor to be measured 10 timesiTo calculate the reading M of the torque sensor to be measurediIs arithmetic mean of
Reading M of the magnetoelectric torque sensor ten times under the condition of obtaining the torque value output by the rotation driving device of the error value delta M0iCalculating the torque reference value M'0。
Specifically, the setting of the number of times and the time such as 10 times and 3 minutes is not limited, but is merely a preferable mode, and the embodiment of the present invention is not limited to other reading times and other reading interval times.
In a specific implementation, in order to judge the error of the torque sensor to be detected and the occurrence frequency of the error more accurately, repeated detection is carried out. That is, the above-mentioned torque reference value M 'is obtained'0And the reading M of the measured torque sensoriIs arithmetic mean of
Then, the reading M of the torque sensor to be measured can be judged according to the following formulaiIs arithmetic mean of
And torque reference value M'0Whether the difference exceeds the maximum allowable error value MPE of the torque sensor to be measured or not, and further calculating the repeatability Sn。
Wherein when
According to the formula
Obtaining the repeatability S of the measured torque sensorn(ii) a Wherein the MPE is a maximum allowable error value of the measured torque sensor.
When in use
According to the formula
Obtaining the repeatability S of the measured torque sensorn(ii) a Wherein the MPE is a maximum allowable error value of the measured torque sensor.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A method for online in-situ calibration of a dynamic torque sensor, comprising:
arranging a magnetoelectric torque sensor on a shaft of a torque sensor to be measured, and connecting the torque sensor to be measured between a rotation driving device and a load device;
starting the rotation driving device, setting a preset torque value for the rotation driving device, and recording a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori；
Using the formula Δ M ═ Mi-M0Obtaining an error value delta M of the measured torque sensor;
wherein the accuracy of the magnetoelectric torque sensor is greater than the accuracy of the measured torque sensor.
2. The method of on-line in-situ calibration of a dynamic torque sensor of claim 1,
setting the rotation driving device to a plurality of different torque values, and correspondingly detecting to obtain a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori；
And calculating an error value delta M of the measured torque sensor under the condition of a plurality of different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor.
3. The method of on-line in-situ calibration of a dynamic torque sensor of claim 2,
setting the rotation driving device to 3 different torque values, and correspondingly detecting to obtain a reading M of the magnetoelectric torque sensor0And a reading M of the measured torque sensori；
And calculating an error value delta M of the measured torque sensor under the condition of 3 different torque values, and selecting the maximum value as the error value delta M of the measured torque sensor.
4. The method of on-line in-situ calibration of a dynamic torque sensor of claim 2,
reading M of the magnetoelectric torque sensor for a plurality of times under the condition of obtaining the torque value output by the rotation driving device of the error value delta M0iAccording to the formula
Calculating torque reference value M'0；
And obtaining said error value Δ MUnder the condition of the torque value output by the rotation driving equipment, reading the reading M of the torque sensor to be measured once every preset timeiReading the readings M of the torque sensor to be measured for a plurality of timesiAnd calculating the reading M of the torque sensor to be measured for a plurality of timesiIs arithmetic mean of
5. The method of online in-situ calibration of a dynamic torque sensor of claim 4,
when in use
According to the formula
Obtaining the repeatability S of the measured torque sensorn；
Wherein the MPE is a maximum allowable error value of the measured torque sensor.
6. The method of online in-situ calibration of a dynamic torque sensor of claim 4,
when in use
According to the formula
Obtaining the repeatability S of the measured torque sensorn；
Wherein the MPE is a maximum allowable error value of the measured torque sensor.
7. The method of online in-situ calibration of a dynamic torque sensor of claim 4,
in obtainingReading M of the magnetoelectric torque sensor for ten times under the condition of the torque value output by the rotation driving equipment with the error value delta M0iCalculating the torque reference value M'0。
8. The method of online in-situ calibration of a dynamic torque sensor of claim 4,
reading M of the torque sensor to be measured every 3 minutesiAnd reading the reading M of the torque sensor to be measured 10 timesiTo calculate the reading M of the torque sensor to be measurediIs arithmetic mean of
9. The method of on-line in-situ calibration of a dynamic torque sensor of claim 1,
and a connecting shaft between the torque sensor to be measured and the rotation driving device and the load device is in a horizontal state or a vertical state.
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