CN113790838A - Method for measuring torque of rotating shaft of engineering machinery - Google Patents
Method for measuring torque of rotating shaft of engineering machinery Download PDFInfo
- Publication number
- CN113790838A CN113790838A CN202111027638.0A CN202111027638A CN113790838A CN 113790838 A CN113790838 A CN 113790838A CN 202111027638 A CN202111027638 A CN 202111027638A CN 113790838 A CN113790838 A CN 113790838A
- Authority
- CN
- China
- Prior art keywords
- torque
- calibration
- shaft
- strain gauge
- torque measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a method for measuring torque of a rotating shaft of engineering machinery, which comprises the following steps: (1) manufacturing a calibration-free torque measurement sensor; (2) based on an orthogonal test design method, carrying out simulation modeling of calibration-free torque measurement sensors with different structural types, fixing the calibration-free torque measurement sensors to a simulation shaft, applying different torques to the simulation shaft, carrying out finite element simulation analysis for optimizing the transmission efficiency eta of the calibration-free torque measurement sensors, searching for an optimal structural parameter combination, and carrying out verification of a bench test, thereby obtaining structural parameters and a torque conversion formula of the calibration-free torque measurement sensors with optimal performance; (3) and developing a calibration-free torque measurement sensing device and a torque telemetering receiving device. The method provided by the invention omits a high-cost calibration test which is required before the traditional strain gauge measuring method, avoids a complicated calibration process, improves the acquisition efficiency of the torque of the transmission shaft of the engineering machinery, and promotes the autonomous and intelligent development of the loader.
Description
Technical Field
The invention relates to the field of measurement of torque of a rotating shaft of engineering machinery.
Background
Firstly, the torque data of the transmission shaft of the engineering machinery plays a very important role in the research of fuel consumption, power matching, structure optimization and the like of the engineering machinery. Secondly, in the process of developing the autonomous and intelligent research of the engineering machinery, the requirement for the torque data of the transmission shaft is gradually increased.
The existing method for measuring the torque of the transmission shaft of the engineering machinery mainly obtains a voltage value generated by resistance change of a strain gauge caused by the strain of the transmission shaft by welding the strain gauge type sensor on the transmission shaft, obtains the change voltage of a bridge through an amplifying circuit, obtains a digital signal through a digital-to-analog conversion circuit, and finally sends the digital signal to an upper computer through a wireless module. The tedious work is that the torque calibration experiment of the transmission shaft and the strain gauge must be carried out on a torque bench before the steps are carried out. For example: the Chinese patent invention CN 201811432431.X proposes to use a plurality of strain gauge type torque sensors at the same time, and to average the torque data obtained by each strain gauge, so as to improve the accuracy of torque measurement, but the method still needs to carry out calibration experiment in advance; chinese patent CN201610311247.4 proposes to use a torque sensor to obtain a strain gauge signal of a transmission shaft, and to add a calibration sensing device composed of a photoelectric sensor and a pulse signal processor to calibrate the output of the torque sensor. However, the method needs to disassemble the transmission shaft and install the photoelectric code disc and other devices, and the operation process is still complicated.
The invention provides a measuring method for the torque of an engineering machinery rotating shaft, which takes the problems of high calibration experiment cost and difficult realization of the measuring method for the engineering machinery rotating shaft strain gauge as starting points. Through standardizing the material selection of the substrate, the strain gauge and the mask layer, designing an orthogonal test to obtain an optimal calibration-free torque measurement sensor parameter combination; and then, solving the solidified transmission efficiency eta through a bench test, thus obtaining the calibration-free torque measurement sensor. The high cost calibration test that must be performed before the traditional strain gage measurement method is eliminated.
Disclosure of Invention
The invention mainly aims to overcome the defects of high calibration test cost, difficulty in implementation and the like of the traditional strain gauge measuring method, and provides a measuring method for the torque of a rotating shaft of the engineering machinery, so that the development of the autonomy and the intellectualization of the engineering machinery is promoted.
The invention adopts the following technical scheme:
a method for measuring torque of a rotating shaft of a construction machine comprises the following steps:
(1) manufacturing a calibration-free torque measurement sensor, wherein the calibration-free torque measurement sensor comprises a substrate, a strain gauge and a mask layer, the strain gauge is pasted on the substrate, the mask layer is pasted on the substrate and the strain gauge, and the whole calibration-free torque measurement sensor is welded on a rotating shaft during actual torque measurement;
(2) based on an orthogonal test design method, carrying out simulation modeling of calibration-free torque measurement sensors with different structural types, fixing the calibration-free torque measurement sensors to a simulation shaft, applying different torques to the simulation shaft, carrying out finite element simulation analysis for optimizing the transmission efficiency eta of the calibration-free torque measurement sensors, searching for an optimal structural parameter combination, and carrying out verification of a bench test, thereby obtaining structural parameters and a torque conversion formula of the calibration-free torque measurement sensors with optimal performance;
the structural parameters include: the material of the substrate, the strain gauge and the mask layer, the size of the substrate and the strain gauge, the size, the position and the distance of a welding spot and the welding position of the substrate on the shaft;
(3) and developing a calibration-free torque measurement sensing device and a torque remote measurement receiving device to realize data acquisition and transmission of the calibration-free torque measurement sensor.
In a preferred embodiment: the strain gage is glued 502 to the center of the substrate.
In a preferred embodiment: and the upper surface of the strain gauge is covered with a mask layer.
In a preferred embodiment: the material of the strain gauge is selected from three aspects of linearity, sensitivity and stability.
In a preferred embodiment: the selection of the base material considers the yield strength, weldability, thermal expansion coefficient, corrosion resistance and oxidation resistance of the material; the base material is smaller than the size of the strain gauge.
In a preferred embodiment: the material of the mask layer is selected according to the insulation, creep resistance, fatigue resistance, extensibility and the size influenced by temperature of the material.
In a preferred embodiment: the spacing between the solder joints is selected to ensure that the substrate is soldered firmly while avoiding shunting.
In a preferred embodiment: the orthogonal experiment refers to:
2.1) according to the length, width and thickness of the substrate; the length and width of the strain gauge; the size, position and spacing of the welding spots; position of substrate welded on the transmission shaft: designing orthogonal tests on the constraint end, the length of an axis 25% away from the constraint end, the middle part, the length of an axis 75% away from the constraint point and the load end, and optimizing the transfer efficiency eta of the calibration-free torque sensor in finite element simulation;
2.2) carrying out bench test verification on the finite element simulation parameter optimizing process;
2.3) calculating the transfer efficiency eta according to the result of the bench test, as shown in the formula (1):
wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t is the torque borne by the shaft; gain is the gain of the amplifier circuit.
In a preferred embodiment: the step (3) is specifically as follows:
(3.1) the torque telemetry apparatus comprising: the device comprises a signal amplification module, a battery module, an LED indication module, an A/D conversion module, a wireless transceiving function and a reserved external interface connected with a strain gauge;
(3.2) the signal amplification module amplifies the variable voltage of the bridge; the battery module supplies power to the torque telemeter; the LED module is used for indicating the working state of the current torque telemeter; the A/D conversion module converts the amplified voltage signal into a digital signal; the wireless transceiving module sends the effective value to an upper computer;
(3.3) the torque telemeter converts the output voltage U of the strain bridge and the torque T borne by the shaft to the bridge voltage obtained in real time, as shown in formula (2):
in the formula, T is the torque borne by the shaft, N.m; eta is transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the voltage of the torque measurement circuit; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; gain is the gain of the amplifier circuit.
As is apparent from the above description of the present invention, the present invention has the following advantageous effects:
compared with the prior art, the invention provides the measuring method for the torque of the rotating shaft of the engineering machinery, and the optimal parameter combination of the calibration-free torque measuring sensor is obtained through finite element simulation by standardizing the material selection of the substrate and the strain gauge and designing an orthogonal test; and then, carrying out bench test verification and solving the solidified transfer efficiency eta according to the experimental structure, thus obtaining the calibration-free torque measurement sensor with known transfer efficiency eta. And then, a calibration-free torque measurement sensing device and a torque remote measurement receiving device are developed, so that data acquisition and transmission of the calibration-free torque measurement sensor are realized. The high-cost calibration test which is required to be carried out before the traditional strain gauge measuring method is omitted, the complicated calibration process is avoided, the torque acquisition efficiency of the engineering machinery is improved, and the autonomous and intelligent development of the loader is promoted.
Drawings
Fig. 1 is a flow chart of an implementation of the method for measuring the torque of the rotating shaft of the engineering machinery based on the calibration-free sensing device.
FIG. 2 is a schematic diagram of a calibration-free torque measurement sensor according to the present invention.
FIG. 3 is a schematic circuit diagram of the calibration-free torque measurement sensing device of the present invention.
FIG. 4 is a schematic diagram of a torque telemetry receiver circuit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like, are used in a broad sense, and for example, "connected" may be a wall-mounted connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
The embodiment aims to design a method for measuring the torque of a rotating shaft of the engineering machinery, which comprises the following steps:
1) through the analysis of the material and mechanical characteristics of the existing sensing unit, namely the strain gauge, the structural scheme design of the calibration-free torque measurement sensor of 'substrate + strain gauge + mask layer' is provided, wherein the strain gauge is pasted on the substrate, the mask layer is pasted on the substrate and the strain gauge, and during the actual torque measurement, the whole calibration-free torque measurement sensor is welded on a rotating shaft;
2) aiming at the structural parameters related to the structural design of the calibration-free torque measurement sensor: materials of the substrate, the strain gauge and the mask layer; the dimensions of the sensor and strain gauge; the size, position and spacing of the welding spots; based on orthogonal test design, carrying out simulation modeling on calibration-free torque measurement sensors of different structural types, fixing the calibration-free torque measurement sensors to a simulation shaft, applying different torques to the simulation shaft, carrying out finite element simulation analysis for optimizing the transmission efficiency eta of the calibration-free torque measurement sensors, searching for an optimal structural parameter combination, and carrying out verification of a bench test, thereby obtaining structural parameters and a torque conversion formula of the calibration-free torque measurement sensors with optimal performance;
3) the calibration-free torque measurement sensing device and the torque remote measurement receiving device are developed, so that data acquisition and transmission of the calibration-free torque measurement sensor are realized, and the calibration-free torque measurement sensing device and the torque remote measurement receiving device are applied to torque measurement of the engineering machinery rotating shaft. Therefore, the problems that the traditional measuring method is high in calibration test cost, difficult to realize and the like in the engineering machinery transmission shaft torque measurement are solved.
Referring to fig. 1, the method for measuring the torque of the rotating shaft of the engineering machine provided by the invention comprises the following specific implementation steps:
(1) through the analysis of the material and mechanical characteristics of the existing sensing unit, namely the strain gauge, the structural scheme design of the calibration-free torque measurement sensor of 'substrate + strain gauge + mask layer' is provided, wherein the strain gauge is pasted on the substrate, the mask layer is pasted on the substrate and the strain gauge, and during actual torque measurement, the whole calibration-free torque measurement sensor is welded on a rotating shaft.
Specifically, the calibration-free torque sensing structure mainly comprises a substrate, a strain gauge and a mask layer. The strain gauge is adhered to the center of the substrate through 502 glue, so that the strain gauge is uniformly stressed on the substrate, and the accuracy of the transmission efficiency eta in a torque calculation formula is ensured. A mask layer covers the strain gauge, and the strain gauge is protected from being interfered by the external environment.
(2) Aiming at the structural parameters related to the structural design of the calibration-free torque measurement sensor: materials of the substrate, the strain gauge and the mask layer; the size of the substrate and the strain gauge; the size, position and spacing of the welding spots; the method comprises the steps of carrying out simulation modeling on calibration-free torque measurement sensors of different structural types based on orthogonal test design on the welding positions of a substrate on a shaft, fixing the calibration-free torque measurement sensors on a simulation shaft, applying different torques to the simulation shaft, carrying out finite element simulation analysis for optimizing the transmission efficiency eta of the calibration-free torque measurement sensors, searching for the optimal structural parameter combination, and carrying out verification of a bench test, thereby obtaining the structural parameters and the torque conversion formula of the calibration-free torque measurement sensors with optimal performance.
The method comprises the following specific steps:
(a) the strain gauge selected should have good linearity, sensitivity and stability.
(b) The selection of the substrate material should comprehensively consider the yield strength, weldability, thermal expansion coefficient, corrosion resistance, oxidation resistance and the like of the material; the size of the strain gauge is slightly larger than that of the strain gauge, so that the subsequent strain gauge pasting area is prevented from being in a thermal deformation area of spot welding.
(c) The material of the mask layer is selected in consideration of the characteristics of insulation, creep resistance, fatigue resistance, extensibility, small temperature influence and the like of the material.
(d) The spacing between the solder joints is selected to ensure that the substrate is soldered as firmly as possible without shunting.
(e) Selecting the length, width and thickness of the substrate; the length and width of the strain gauge; the size, position and spacing of the welding spots; position of substrate welded on the transmission shaft: a constrained end, a length of the shaft 25% from the constrained end, a middle, a length of the shaft 75% from the constrained point, and a loaded end. And designing an orthogonal test, and performing parameter combination for optimizing the transfer efficiency eta of the calibration-free torque sensor in finite element simulation.
(f) And (5) verifying the bench test in the finite element simulation parameter optimizing process.
(g) Calculating the transfer efficiency eta according to the result of the bench test, as shown in formula (1):
wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t is the torque borne by the shaft; gain is the gain of the amplifier circuit.
(3) The calibration-free torque measurement sensing device and the torque remote measurement receiving device are developed, so that data acquisition and transmission of the calibration-free torque measurement sensor are realized, and the calibration-free torque measurement sensing device and the torque remote measurement receiving device are applied to torque measurement of the engineering machinery rotating shaft.
The method comprises the following specific steps:
(a) the self-designed torque telemetry device essentially comprises: the device comprises a signal amplification module, a battery module, an LED indication module, an A/D conversion module, a wireless transceiving function and an external interface which is reserved and connected with a strain gauge.
(b) The signal amplification module amplifies the variable voltage of the bridge; the battery module supplies power to the torque telemeter; the LED module is used for indicating the working state of the current torque telemeter; (ii) a The A/D conversion module converts the amplified voltage signal into a digital signal; and the wireless transceiving module sends the effective value to the upper computer.
(c) The torque telemeter converts the output voltage U of the strain bridge and the torque T borne by the shaft to the bridge voltage obtained in real time, as shown in formula (2):
wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t is the torque borne by the shaft; gain is the gain of the amplifier circuit.
Example 1
The method of the present invention is described in connection with the preparation and implementation of bench tests.
(1) Through the analysis of the material and mechanical characteristics of the existing sensing unit, namely the strain gauge, the structural scheme design of the calibration-free torque measurement sensor of 'substrate + strain gauge + mask layer' is provided, wherein the strain gauge is pasted on the substrate, the mask layer is pasted on the substrate and the strain gauge, and during actual torque measurement, the whole calibration-free torque measurement sensor is welded on a rotating shaft.
(2) According to the selection principle of a substrate, a strain gauge and a mask layer, 0Cr18NiTi (304) stainless steel is selected as a substrate material; copper is the material of the strain gauge, and the basic parameters are as follows: nominal resistance value of 350 ohm, sensitivity coefficient of 2.0 +/-1 percent and elastic modulus E of strain resistance wire2Is 163.0X 103MPa, Poisson's ratio mu of 0.33, and piezoresistive coefficient lambda of 1 x 10-12Pa; the mask layer is selected from polycarbonate. But the choice of material is not limited thereto.
(3) Selecting the length, width and thickness of the substrate; the length and width of the strain gauge; the size, position and spacing of the welding spots; position of substrate welded on the transmission shaft: a constrained end, a length of the shaft 25% from the constrained end, a middle, a length of the shaft 75% from the constrained point, and a loaded end. Designing an orthogonal test, carrying out parameter combination of optimization of the transfer efficiency eta of the calibration-free torque sensor in finite element simulation, and carrying out verification of a bench test. The following parameter combinations were obtained:
the base parameters were: the length is 35mm, the width is 25mm, and the thickness is 0.05 mm; the base parameters were: the length is 9.4mm, and the width is 6.5 mm; the parameters of the welding spot are as follows: the size is 1.5mm, the position is 1mm away from the boundary of the substrate, and the distance is 6.5 mm; the weld location is 75% of the shaft length from the point of constraint.
(4) And substituting the parameters into the formula (1) according to the bench test result to obtain the transfer efficiency eta.
Wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t is the torque borne by the shaft; gain is the gain of the amplifier circuit.
(5) The self-designed torque telemetry device essentially comprises: the device comprises a signal amplification module, a battery module, an LED indication module, an A/D conversion module, a wireless transceiving function and an external interface which is reserved and connected with a strain gauge.
(6) The signal amplification module amplifies the variable voltage of the bridge; the battery module supplies power to the torque telemeter; the LED module is used for indicating the working state of the current torque telemeter; (ii) a The A/D conversion module converts the amplified voltage signal into a digital signal; and the wireless transceiving module sends the effective value to the upper computer.
(7) The torque telemeter converts the output voltage U of the strain bridge and the torque T borne by the shaft to the bridge voltage obtained in real time, as shown in formula (2):
wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t isThe torque applied to the shaft; gain is the gain of the amplifier circuit.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.
Claims (9)
1. A method for measuring torque of a rotating shaft of a construction machine is characterized by comprising the following steps:
(1) manufacturing a calibration-free torque measurement sensor, wherein the calibration-free torque measurement sensor comprises a substrate, a strain gauge and a mask layer, the strain gauge is pasted on the substrate, the mask layer is pasted on the substrate and the strain gauge, and the whole calibration-free torque measurement sensor is welded on a rotating shaft during actual torque measurement;
(2) based on an orthogonal test design method, carrying out simulation modeling of calibration-free torque measurement sensors with different structural types, fixing the calibration-free torque measurement sensors to a simulation shaft, applying different torques to the simulation shaft, carrying out finite element simulation analysis for optimizing the transmission efficiency eta of the calibration-free torque measurement sensors, searching for an optimal structural parameter combination, and carrying out verification of a bench test, thereby obtaining structural parameters and a torque conversion formula of the calibration-free torque measurement sensors with optimal performance;
the structural parameters include: the material of the substrate, the strain gauge and the mask layer, the size of the substrate and the strain gauge, the size, the position and the distance of a welding spot and the welding position of the substrate on the shaft;
(3) and developing a calibration-free torque measurement sensing device and a torque remote measurement receiving device to realize data acquisition and transmission of the calibration-free torque measurement sensor.
2. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the method comprises the following steps: the strain gage is glued 502 to the center of the substrate.
3. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the method comprises the following steps: and the upper surface of the strain gauge is covered with a mask layer.
4. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the material of the strain gauge is selected from three aspects of linearity, sensitivity and stability.
5. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the base material is selected in consideration of yield strength, weldability, thermal expansion coefficient, corrosion resistance and oxidation resistance of the material; the base material is smaller than the size of the strain gauge.
6. The method as claimed in claim 1, wherein the material of the mask layer is selected in consideration of insulation, creep resistance, fatigue resistance, elongation and temperature influence.
7. The method as claimed in claim 1, wherein the interval between the welding points is selected to ensure that the substrate is welded firmly without generating a shunt phenomenon.
8. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the orthogonal experiment refers to:
2.1) according to the length, width and thickness of the substrate; the length and width of the strain gauge; the size, position and spacing of the welding spots; position of substrate welded on the transmission shaft: designing orthogonal tests on the constraint end, the length of an axis 25% away from the constraint end, the middle part, the length of an axis 75% away from the constraint point and the load end, and optimizing the transfer efficiency eta of the calibration-free torque sensor in finite element simulation;
2.2) carrying out bench test verification on the finite element simulation parameter optimizing process;
2.3) calculating the transfer efficiency eta according to the result of the bench test, as shown in the formula (1):
wherein η is the transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the torque measurement circuit voltage; e is a reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; t is the torque borne by the shaft; gain is the gain of the amplifier circuit.
9. The method for measuring the torque of the rotating shaft of the engineering machine according to claim 1, wherein the step (3) is as follows:
(3.1) the torque telemetry apparatus comprising: the device comprises a signal amplification module, a battery module, an LED indication module, an A/D conversion module, a wireless transceiving function and a reserved external interface connected with a strain gauge;
(3.2) the signal amplification module amplifies the variable voltage of the bridge; the battery module supplies power to the torque telemeter; the LED module is used for indicating the working state of the current torque telemeter; the A/D conversion module converts the amplified voltage signal into a digital signal; the wireless transceiving module sends the effective value to an upper computer;
(3.3) the torque telemeter converts the output voltage U of the strain bridge and the torque T borne by the shaft to the bridge voltage obtained in real time, as shown in formula (2):
in the formula, T is the torque borne by the shaft, N.m; eta is transfer efficiency; e1Represents the elastic modulus of the shaft; alpha is the ratio of the inner diameter to the outer diameter of the shaft; d is the outer diameter of the shaft; u is the voltage of the torque measurement circuit; e isA reference voltage; v is the Poisson's ratio of the shaft; mu is the Poisson ratio of the strain gauge metal wire; λ is the piezoresistive coefficient; e2The elastic modulus of the strain gauge resistance wire; gain is the gain of the amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111027638.0A CN113790838B (en) | 2021-09-02 | 2021-09-02 | Method for measuring torque of rotating shaft of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111027638.0A CN113790838B (en) | 2021-09-02 | 2021-09-02 | Method for measuring torque of rotating shaft of engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113790838A true CN113790838A (en) | 2021-12-14 |
| CN113790838B CN113790838B (en) | 2023-03-21 |
Family
ID=79182541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111027638.0A Active CN113790838B (en) | 2021-09-02 | 2021-09-02 | Method for measuring torque of rotating shaft of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113790838B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359618A (en) * | 2014-12-03 | 2015-02-18 | 中国北方车辆研究所 | Device for field calibration of dynamometer torquemeter of rotary mechanical test bed |
| CN104568256A (en) * | 2014-10-07 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Engine torque detection system and method |
| CN107559412A (en) * | 2017-10-10 | 2018-01-09 | 重庆大学 | A kind of AMT/DCT transmission clutch torque adaptive scaling method |
| CN107957308A (en) * | 2016-10-15 | 2018-04-24 | 北京世通科创技术有限公司 | Flange type torque sensor |
| CN109084926A (en) * | 2018-08-08 | 2018-12-25 | 武汉理工大学 | Torque of rotating shaft measurement method and system based on wireless technology |
| CN209043232U (en) * | 2018-12-21 | 2019-06-28 | 广东微应变传感科技有限公司 | A kind of integrated foil resistance strain gauge for torque sensor |
| CN111337258A (en) * | 2020-02-14 | 2020-06-26 | 北京理工大学 | Device and method for online calibration of engine control parameters by combining genetic algorithm and extremum search algorithm |
| CN113010983A (en) * | 2021-03-31 | 2021-06-22 | 华南理工大学 | Method for predicting transmission efficiency of constant velocity universal joint based on parameterized model |
-
2021
- 2021-09-02 CN CN202111027638.0A patent/CN113790838B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568256A (en) * | 2014-10-07 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Engine torque detection system and method |
| CN104359618A (en) * | 2014-12-03 | 2015-02-18 | 中国北方车辆研究所 | Device for field calibration of dynamometer torquemeter of rotary mechanical test bed |
| CN107957308A (en) * | 2016-10-15 | 2018-04-24 | 北京世通科创技术有限公司 | Flange type torque sensor |
| CN107559412A (en) * | 2017-10-10 | 2018-01-09 | 重庆大学 | A kind of AMT/DCT transmission clutch torque adaptive scaling method |
| CN109084926A (en) * | 2018-08-08 | 2018-12-25 | 武汉理工大学 | Torque of rotating shaft measurement method and system based on wireless technology |
| CN209043232U (en) * | 2018-12-21 | 2019-06-28 | 广东微应变传感科技有限公司 | A kind of integrated foil resistance strain gauge for torque sensor |
| CN111337258A (en) * | 2020-02-14 | 2020-06-26 | 北京理工大学 | Device and method for online calibration of engine control parameters by combining genetic algorithm and extremum search algorithm |
| CN113010983A (en) * | 2021-03-31 | 2021-06-22 | 华南理工大学 | Method for predicting transmission efficiency of constant velocity universal joint based on parameterized model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113790838B (en) | 2023-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4329478B2 (en) | Mechanical quantity measuring device | |
| RU2369845C2 (en) | Weight detector | |
| CN101446193B (en) | Device and method for detecting coal seam gas pressure and coal wall stress | |
| CN101832830B (en) | Flush packaged pressure sensor with high temperature resistance and high frequency response | |
| CN103308223A (en) | Device and method for testing wall shear stress based on flexible heat-sensitive sensors | |
| CA2434489A1 (en) | Drilling mechanics load cell sensor | |
| CN105651409A (en) | Thermocouple cold junction compensation and temperature measurement circuit and device | |
| WO2022028193A1 (en) | Strain measurement apparatus and manufacturing method therefor | |
| CN113790838B (en) | Method for measuring torque of rotating shaft of engineering machinery | |
| CN105423994A (en) | Novel hoop strain measuring device | |
| CN103148971A (en) | Method for testing local stress field of end part structure of thermal jacket of ultrahigh-pressure tubular reactor | |
| CN105973508A (en) | Resistance strain gauge bonding and calibration method capable of measuring contact pressure of disc friction pair | |
| CN104964784A (en) | Core body of high-temperature and high-pressure sensor | |
| CN110940445B (en) | Optical fiber ring type residual stress test system and residual stress test method | |
| CN100468018C (en) | Opening type anti-eccentric-loading three elastic cylinders load cell | |
| CN111457834A (en) | Photovoltaic support deformation detection device | |
| CN105865496A (en) | System and method for measuring resistive transducer through bridge circuit | |
| CN212363529U (en) | Pressure transmitter | |
| CN111811725A (en) | Pressure transmitter and manufacturing method thereof | |
| CN203824688U (en) | Grating pressure transducer for detecting oil well pressure | |
| CN219870038U (en) | Packaging structure of temperature sensor | |
| CN203385687U (en) | Wireless detector for thermal performance of building envelope | |
| CN213336575U (en) | Full-bridge strain gauge for short-circuit type high-precision sensor | |
| CN214471444U (en) | Split-type sputtering torque sensitive shaft | |
| CN218673532U (en) | Novel piece formula high temperature fiber grating strain transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |