Non-contact dynamic torque measuring device and torque testing method

Abstract

The invention provides a non-contact dynamic torque measuring device and a torque testing method. The non-contact dynamic torque measuring device comprises a sensor body, an amplifying shaft and a non-contact displacement sensor, the sensor body is coaxially sleeved outside the amplification shaft, two ends of the sensor body are fixedly connected with the amplification shaft, and the sensor body axially comprises sleeve bodies at two ends, a gridding sleeve in the middle and a central disc located in the middle of the gridding sleeve; the gridding sleeve comprises a plurality of gridding ribs which are arranged in parallel in the circumferential direction and twisted in the same rotating direction, due to the fact that the coupling effect exists in the anisotropy, longitudinal deformation and torsional deformation of the gridding sleeve, torsion angles at the two ends can be converted into axial displacement of the center disc under the condition that rigid body rotation of the rotating shaft is eliminated, and the rotation direction of the rotating shaft is changed. Torsional deformation is converted into axial displacement of the center disc, non-contact dynamic torque measurement is achieved through the non-contact displacement sensor under the condition that an external sliding ring is not needed, and measurement precision, reliability and non-interference performance are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of torque measurement technology, specifically to a non-contact dynamic torque measurement device and torque testing method. Background Technology

[0002] Rotating power machinery is the cornerstone of modern industry, permeating various fields such as energy, transportation, manufacturing, and automation. In these mechanical systems, rotating shafts, as the core components transmitting power and motion, have torque as a critical physical parameter. Accurate torque measurement is essential for equipment performance optimization, energy efficiency management, condition monitoring, and safety assurance. In industrial production, such as large generator sets, wind turbines, rolling mills, and servo motors in automated production lines, real-time torque monitoring ensures equipment operates under optimal conditions, prevents equipment damage or production interruptions due to overload, and provides crucial data support for predictive maintenance. In the transportation sector, from testing automobile engines, transmissions, and electric drive systems to ship propeller shafts, dynamic torque measurement is a core component of performance calibration, energy consumption assessment, and quality control during the research and development phase.

[0003] However, among all application scenarios, the aerospace field has the most stringent performance requirements for torque sensors. This is especially true for aero-engines, the "heart" of modern aircraft, including turbofan, turboprop, and turboshaft engines, which operate in extreme environments and demand extremely high reliability and accuracy. The engine's main shaft transmits enormous power between the turbine and the transmission, requiring designers to accurately grasp torque data under various operating conditions for structural optimization and performance verification. Torque peaks during high-power output phases such as takeoff and climb, which represent potential high-risk failure points. Therefore, installing highly reliable dynamic torque sensors on critical engine shaft systems for real-time monitoring across the entire time domain is of irreplaceable strategic value for ensuring safe engine operation, preventing catastrophic failures, and accumulating valuable design verification data.

[0004] Torque sensors, which calculate the torque transmitted by measuring the deformation of a torsional shaft, are widely used in the detection and control of torque transmission devices. These devices need to accurately measure the torque transmitted in the shaft, and due to their long-term operation in aircraft engines, they must ensure stable operation under extreme conditions. The main design specifications for torque sensors include torque measurement accuracy and torque measurement range. Based on whether the measured shaft rotates, torque sensors can be divided into dynamic torque sensors and static torque sensors. If the measured shaft rotates, devices such as slip rings are needed to prevent data cable entanglement and ensure normal system operation. For example, patent document CN120489403A discloses a commercial vehicle half-shaft torque testing system and method, which achieves signal acquisition by connecting strain gauges and slip rings; static torque sensors, on the other hand, do not require these complex structures. According to the measurement principle, torque sensors can be classified into strain gauge torque sensors and optical torque sensors. Strain gauge torque sensors typically measure shaft deformation by attaching strain gauges to the shaft surface, such as the shackle torque measuring device on a pipe column disclosed in patent document CN120521775A and the adaptive calibration dynamic torque measuring sensor disclosed in patent document CN222866096U, which measure torque through a torque-sensing strain gauge. Optical torque sensors measure the torsion angle by measuring the time interval between two points at different positions on the rotating shaft as they pass through a certain angle, such as the variable frequency high-power fan torque monitoring system disclosed in patent document CN120489402A, which measures the torsion angle at different positions by the time interval of optical pulse signals. Based on whether the sensor is in contact with the shaft being measured, sensors can be divided into contact sensors and non-contact sensors. Contact sensors require the measuring element and the structure being measured to maintain contact. For example, patent document CN120482154A discloses a multi-channel calibrated redundant angle torque sensor and its degraded measurement method, which achieves torque measurement through the rotation angle of gears and Hall effect steering wheel.

[0005] These measurement methods suffer from drawbacks in continuously rotating mechanisms, including overly complex structures, the need for slip rings and data cables, difficulty operating at high speeds, and significant temperature sensitivity. Furthermore, their complexity and susceptibility to environmental interference limit their application in measuring the torque of rotating shafts in aerospace engines. Therefore, the limitations of traditional torque sensors restrict their measurement accuracy and application range. Consequently, it is necessary to design a non-contact sensor that is simple in structure, highly accurate, and stable. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the purpose of this invention is to provide a non-contact dynamic torque measurement device and torque testing method.

[0007] The non-contact dynamic torque measuring device provided by the present invention includes a sensor body, an amplifying shaft, and a non-contact displacement sensor. The sensor body has a sleeve structure and is coaxially sleeved outside the amplification shaft. Both ends of the sensor body are fixedly connected to the amplification shaft, and the amplification shaft is used to transmit external torque to the sensor body. The sensor body includes, along the axial direction, sleeve bodies at both ends, a gridded sleeve in the middle, and a central disk in the middle of the gridded sleeve; The meshed sleeve includes multiple mesh ribs arranged parallel to each other in the circumferential direction and twisted in the same direction. One end of each mesh rib is connected to the inner end of the sleeve body, and the other end of each mesh rib is connected to the end face of the central disk. The mesh ribs on both sides of the central disk have opposite directions of rotation. The non-contact displacement sensor is installed on the outside of the sensor body and is used to detect the axial displacement of the central disk under the action of external torque.

[0008] Preferably, the outer end of the sleeve body has multiple grooves extending axially along the circumferential direction, and the outer end of the sleeve body is fixedly installed on the outer surface of the magnifying shaft by a clamp.

[0009] Preferably, the central region of the amplifying shaft has multiple grooves along the circumferential direction to reduce the torsional stiffness of the amplifying shaft.

[0010] Preferably, it also includes a sensor bracket, which is mounted on the outside of the sensor body; The sensor bracket has a slot in the middle, and the edge of the central disk is located in the slot and can move axially in the slot. Both ends of the sensor bracket have mounting holes, and non-contact displacement sensors are installed in the mounting holes at both ends.

[0011] Preferably, the sensor bracket is made of insulating material.

[0012] Preferably, there are multiple sensor supports, which are arranged circumferentially along the central disk.

[0013] Preferably, the sensor body is symmetrically distributed about the central disk.

[0014] Preferably, the meshed sleeve includes a first meshed sleeve located on one side of the central disk and a second meshed sleeve located on the other side of the central disk; The first meshed sleeve has mesh ribs configured such that when the sleeve body is torn and deformed in a first direction, the axial spacing between the two ends of the mesh ribs decreases, and when the sleeve body is torn and deformed in a second direction opposite to the first direction, the axial spacing between the two ends of the mesh ribs increases. The second meshed sleeve has mesh ribs configured such that when the sleeve body is torn and deformed in the first direction, the axial spacing between the two ends of the mesh ribs increases, and when the sleeve body is torn and deformed in the second direction, the axial spacing between the two ends of the mesh ribs decreases. The axial movement of the central disk is achieved by the change in the spacing between the two ends of the mesh ribs in the first meshed sleeve and the second meshed sleeve.

[0015] The torque testing method of the non-contact dynamic torque measuring device provided by the present invention, using the aforementioned non-contact dynamic torque measuring device, includes the following steps: Step 1: The amplifying shaft rotates under the action of external torque, which drives the sensor body to rotate. The sensor body undergoes torsional deformation under the action of external torque, and the meshed sleeve converts the torsional deformation into the axial displacement of the central disk. Step 2: The non-contact displacement sensor measures the axial displacement of the central disk and calculates the torque to be measured based on the axial displacement of the central disk.

[0016] Preferably, in step 2, the torque calculation step includes: The torsion angle at both ends of the sensor body Transformed into the axial displacement of the central disk The mesh reinforcement is simplified as an obliquely placed rod. Assuming the sleeve body radius is R and the torsion angle is... Then its right-end radial displacement is The included angle between the rod and the end face of the sleeve body is The length of the rod is The rotation angles of the two rods located on the left and right sides of the central disk are respectively and The relationship between the variables is as follows: Formula 1:

[0017] Formula 2:

[0018] Formula 3:

[0019] Equations one through three, due to and All are small quantities, and the following equivalent infinitesimals exist: Formula 4:

[0020] get: Formula 5:

[0021] Formula Six:

[0022] Formula 7:

[0023] Ignoring second-order minor quantities, we can solve equations five through seven in parallel and eliminate them. and The relationship between the axial displacement of the central disk and the radial displacement of the right end of the sensor body was obtained: Formula 8:

[0024] The torsion angles at both ends of the sensor body are obtained by measuring the axial displacement of the central disk of the sensor body, and the torque on the amplification shaft is then calculated.

[0025] Compared with the prior art, the present invention has the following beneficial effects: This invention features a simple structure. By setting up a set of gridded sleeves with opposite rotation directions, the torsional deformation of the magnifying shaft is converted into the axial displacement of the central disk. Since the measurement difficulty of axial displacement is much lower than that of torsional angle, and it can automatically eliminate the error caused by the rigid body rotation of the rotating shaft, the measurement accuracy is improved. At the same time, by introducing a non-contact displacement sensor, non-contact displacement measurement is achieved, thereby avoiding the use of wires and slip rings from the measured shaft, greatly reducing the complexity of the structure, avoiding the influence of the measurement system on the measured system, and ensuring the stability and reliability of the measurement system. Attached Figure Description

[0026] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the sensor body in this invention; Figure 4 This is a schematic diagram illustrating the working principle of the sensor body in this invention.

[0027] The diagram shows: Detailed Implementation

[0028] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0029] This invention discloses a non-contact dynamic torque measuring device and torque testing method. By setting a set of gridded sleeves with opposite rotation directions, the torsional deformation of the amplifying shaft is converted into the axial displacement of the central disk. Since the measurement difficulty of axial displacement is much lower than that of torsional angle, and the error caused by the rigid body rotation of the rotating shaft can be automatically eliminated, the measurement accuracy is improved. At the same time, by introducing a non-contact displacement sensor, non-contact displacement measurement is achieved, thereby avoiding the use of wires and slip rings from the measured shaft, greatly reducing the complexity of the structure, avoiding the influence of the measurement system on the measured system, and ensuring the stability and reliability of the measurement system.

[0030] The non-contact dynamic torque measuring device provided by the present invention, such as Figure 1 As shown, the sensor includes a sensor body 100, an amplifying shaft 200, a non-contact displacement sensor 300, a sensor bracket 400, and a clamp 500. The amplifying shaft 200, the sensor body 100, and the clamp 500 are distributed from the inside out, while the non-contact displacement sensor 300 and the sensor bracket 400 are distributed outside the sensor body 100.

[0031] The sensor body 100 has a sleeve structure and is coaxially sleeved outside the amplifying shaft 200. Both ends of the sensor body 100 are fixedly connected to the amplifying shaft 200, which is used to transmit external torque to the sensor body 100. The sensor body 100 includes, along its axial direction, sleeve bodies 101 at both ends, a gridded sleeve 102 in the middle, and a central disk 103 in the middle of the gridded sleeve 102. The gridded sleeve 102 includes multiple grid ribs arranged parallel to each other circumferentially and twisted in the same direction. One end of each grid rib is connected to the inner end of the sleeve body 101, and the other end is connected to the end face of the central disk 103. The grid ribs on both sides of the central disk 103 have opposite directions of rotation. The non-contact displacement sensor 300 is installed outside the sensor body 100 and is used to detect the axial displacement of the central disk 103 under the action of external torque.

[0032] Specifically, the sensor body 100 consists of three parts: a sleeve 101, a meshed sleeve 102, and a central disk 103. The meshed sleeve 102 essentially utilizes an anisotropic structure to couple torsional deformation and axial deformation, converting the torsional deformation caused by torque into axial displacement of the central disk 103, such as... Figure 3 As shown, the central disk 103 and the non-contact displacement sensor probe 300 remain parallel. When a torsion angle occurs at both ends, the central disk 103 will undergo a small axial displacement. Multiple axially extending grooves are formed along the circumferential direction at the outer end of the sleeve body 101, which facilitates clamping and fixing with the amplification shaft 200 by clamps 500 to maintain consistent rotation angles.

[0033] The meshed sleeve 102 includes a first meshed sleeve located on one side of the central disk 103 and a second meshed sleeve located on the other side of the central disk 103. The mesh ribs of the first meshed sleeve are configured such that when the sleeve body 101 is torsional in a first direction, the axial spacing between the two ends of the mesh ribs decreases, and when the sleeve body 101 is torsional in a second direction opposite to the first direction, the axial spacing between the two ends of the mesh ribs increases. The mesh ribs of the second meshed sleeve are configured such that when the sleeve body 101 is torsional in the first direction, the axial spacing between the two ends of the mesh ribs increases, and when the sleeve body 101 is torsional in the second direction, the axial spacing between the two ends of the mesh ribs decreases. The axial movement of the central disk is achieved by changing the spacing between the first and second mesh ribs.

[0034] The magnifying shaft 200 is formed by slotting a solid shaft. Specifically, multiple grooves are opened in the circumferential direction in the middle area of ​​the magnifying shaft 200. The purpose of slotting is to reduce the torsional stiffness of the shaft, thereby amplifying the torsional deformation caused by torque and improving the measurement accuracy of the torsion angle.

[0035] The non-contact displacement sensor 300 is a non-contact displacement measurement device, including but not limited to eddy current sensors. Due to its high precision, high reliability, and strong anti-interference capability, it is widely used in industrial, scientific research, and aerospace fields. Two non-contact displacement sensors 300 are distributed on both sides of the central disk 103, with their probes parallel to the central disk 103. When the central disk 103 undergoes axial displacement, the non-contact displacement sensor 300 can measure the distance between the central disk 103 and the probe, thereby calculating the axial displacement of the central disk 103. Because the non-contact displacement sensor 300 is a non-contact sensor, it does not require a data cable to be led out from the drive shaft when measuring distance, thus achieving non-contact measurement.

[0036] The sensor bracket 400 is made of insulating material and is installed on the outside of the sensor body 100. A slot is provided in the middle, and the edge of the central disk 103 is located in the slot and can move axially in the slot. Mounting holes are provided at both ends of the sensor bracket 400, and non-contact displacement sensors 300 are installed in the mounting holes at both ends. Two sets of non-contact displacement sensors 300 and sensor bracket 400 can be placed on both sides of the shaft, and the displacement values ​​measured by the two can be averaged to eliminate the rigid body motion caused by the rotation of the shaft around the z-axis.

[0037] The clamp 500 consists of two semicircular rings and is installed on the slotted portion of the sensor body 100. The two semicircular rings of the clamp 500 are connected together by bolts to press the sensor body 100 and the amplification shaft 200 together, ensuring that the torsion angles of the sensor body 100 and the amplification shaft 200 are the same.

[0038] The torque testing method of the non-contact dynamic torque measuring device provided by the present invention, using the aforementioned non-contact dynamic torque measuring device, includes the following steps: Step 1: The amplifying shaft 200 rotates under the action of external torque, and drives the sensor body 100 to rotate. The sensor body 100 undergoes torsional deformation under the action of external torque. The mesh sleeve 102 converts the torsional deformation into the axial displacement of the central disk 103. Step 2: The non-contact displacement sensor 300 measures the axial displacement of the central disk 103 and calculates the torque to be measured based on the axial displacement of the central disk 103.

[0039] The specific steps for calculating torque include: The torsion angles at both ends of the sensor body 100 Transformed into the axial displacement of the central disk 103 The mesh reinforcement is simplified as an obliquely placed rod. Assuming the radius of the sleeve body 101 is R and the torsion angle is... Then its right-end radial displacement is The included angle between the rod and the end face of the sleeve body 101 is The length of the rod is The rotation angles of the two rods located on the left and right sides of the central disk 103 are respectively and The relationship between the variables is as follows: Formula 1:

[0040] Formula 2:

[0041] Formula 3:

[0042] Equations one through three, due to and All are small quantities, and the following equivalent infinitesimals exist: Formula 4:

[0043] get: Formula 5:

[0044] Formula Six:

[0045] Formula 7:

[0046] Ignoring second-order minor quantities, we can solve equations five through seven in parallel and eliminate them. and The relationship between the axial displacement of the central disk 103 and the radial displacement of the right end of the sensor body 100 is obtained: Formula 8:

[0047] The torsion angles at both ends of the sensor body 100 are obtained by the radial displacement of the right end of the sensor body 100, thereby calculating the torque on the amplification shaft 200.

[0048] In summary, a set of obliquely symmetrically placed rods converts vertical displacement into horizontal displacement. Multiple rods and reinforcing ribs are staggered to form an anisotropic meshed sleeve 102. The meshed sleeves 102 on both sides of the central disk 103 have opposite spiral directions. This anisotropic structure can convert the torsional deformation at both ends of the sensor body 100 into axial displacement of the central disk 103. Furthermore, by measuring the displacement of the central disk 103, the torsional angle of the amplification shaft 200 and the transmitted torque can be measured. The smaller the value, the more pronounced the amplification effect of the torsional angle-displacement.

[0049] The sensor body 100 is symmetrically distributed about the central disk 103. When twisting occurs in opposite directions, the central disk 103 will produce displacement in opposite directions. The rotation angles at both ends of the sensor body 100 can be obtained by measuring the displacement of the central disk 103, thereby calculating the torque on the amplification shaft 200. The correspondence between the axial displacement of the central disk 103 and the rotation angles at both ends of the sensor body 100 can be obtained through measurement and calibration.

[0050] Compared to traditional torque measurement systems and methods, this invention converts torsional deformation into axial displacement of the central disk through an anisotropic structure. Since measuring axial displacement is far less difficult than measuring torsional angles, and it can automatically eliminate errors caused by the rigid rotation of the rotating shaft, measurement accuracy is improved. Furthermore, by introducing a non-contact displacement sensor, non-contact displacement measurement is achieved, avoiding the use of wires and slip rings from the measured shaft. This significantly reduces structural complexity, prevents the measurement system from affecting the measured system, and ensures the stability and reliability of the measurement system.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A non-contact dynamic torque measuring device, characterized in that, It includes a sensor body (100), an amplification shaft (200), and a non-contact displacement sensor (300). The sensor body (100) has a sleeve structure and is coaxially sleeved outside the amplification shaft (200). Both ends of the sensor body (100) are fixedly connected to the amplification shaft (200). The amplification shaft (200) is used to transmit external torque to the sensor body (100). The sensor body (100) includes, along the axial direction, sleeve bodies (101) at both ends, a gridded sleeve (102) in the middle, and a central disk (103) in the middle of the gridded sleeve (102). The gridded sleeve (102) includes multiple grid ribs that are parallel to each other in the circumferential direction and twisted in the same direction. One end of the grid rib is connected to the inner end of the sleeve body (101), and the other end of the grid rib is connected to the end face of the central disk (103). The grid ribs of the gridded sleeves (102) located on both sides of the central disk (103) have opposite directions of rotation. The non-contact displacement sensor (300) is installed outside the sensor body (100) and is used to detect the axial displacement of the central disk (103) under the action of external torque.

2. The non-contact dynamic torque measuring device according to claim 1, characterized in that, The outer end of the sleeve body (101) has multiple grooves extending axially in the circumferential direction, and the outer end of the sleeve body (101) is fixedly installed on the outer surface of the magnifying shaft (200) by a clamp (500).

3. The non-contact dynamic torque measuring device according to claim 1, characterized in that, The central region of the magnifying shaft (200) has multiple grooves along the circumferential direction to reduce the torsional stiffness of the magnifying shaft (200).

4. The non-contact dynamic torque measuring device according to claim 1, characterized in that, It also includes a sensor bracket (400) which is mounted on the outside of the sensor body (100); The sensor bracket (400) has a slot in the middle, and the edge of the central disk (103) is located in the slot and can move axially in the slot. Both ends of the sensor bracket (400) are provided with mounting holes, and non-contact displacement sensors (300) are installed in the mounting holes at both ends.

5. The non-contact dynamic torque measuring device according to claim 4, characterized in that, The sensor bracket (400) is made of insulating material.

6. The non-contact dynamic torque measuring device according to claim 4, characterized in that, There are multiple sensor brackets (400), and the multiple sensor brackets (400) are arranged circumferentially along the central disk (103).

7. The non-contact dynamic torque measuring device according to claim 1, characterized in that, The sensor body (100) is symmetrically distributed about the central disk (103).

8. The non-contact dynamic torque measuring device according to claim 7, characterized in that, The gridded sleeve (102) includes a first gridded sleeve located on one side of the central disk (103) and a second gridded sleeve located on the other side of the central disk (103); The first meshed sleeve has mesh ribs configured such that when the sleeve body (101) is torsionally deformed in a first direction, the axial spacing between the two ends of the mesh ribs decreases, and when the sleeve body (101) is torsionally deformed in a second direction opposite to the first direction, the axial spacing between the two ends of the mesh ribs increases. The second gridded sleeve has grid ribs configured such that when the sleeve body (101) is torn and deformed in the first direction, the axial spacing between the two ends of the grid ribs increases, and when the sleeve body (101) is torn and deformed in the second direction, the axial spacing between the two ends of the grid ribs decreases. The axial movement of the central disk (103) is achieved by changing the spacing between the two ends of the grid ribs in the first gridded sleeve and the second gridded sleeve.

9. A torque testing method for a non-contact dynamic torque measuring device, characterized in that, The non-contact dynamic torque measuring device according to any one of claims 1-8 comprises the following steps: Step 1: The amplifying shaft (200) rotates under the action of external torque, and drives the sensor body (100) to rotate. The sensor body (100) generates torsional deformation under the action of external torque. The mesh sleeve (102) converts the torsional deformation into the axial displacement of the central disk (103). Step 2: The non-contact displacement sensor (300) measures the axial displacement of the central disk (103) and calculates the torque to be measured based on the axial displacement of the central disk (103).

10. The torque testing method of the non-contact dynamic torque measuring device according to claim 9, characterized in that, Step 2, the torque calculation steps include: The torsion angles at both ends of the sensor body (100) Transformed into the axial displacement of the central disk (103) The mesh reinforcement is simplified as an obliquely placed rod. Assuming the radius of the sleeve body (101) is R and the torsion angle is... Then its right-end radial displacement is The included angle between the end face of the rod and the sleeve body (101) is The length of the rod is The rotation angles of the two rods located on the left and right sides of the central disk (103) are respectively and The relationship between the variables is as follows: Formula 1: Formula 2: Formula 3: Equations one through three, due to and All are small quantities, and the following equivalent infinitesimals exist: Formula 4: get: Formula 5: Formula Six: Formula 7: Ignoring second-order minor quantities, we can solve equations five through seven in parallel and eliminate them. and The relationship between the axial displacement of the central disk (103) and the radial displacement of the right end of the sensor body (100) is obtained: Formula 8: The torsion angles at both ends of the sensor body (100) are obtained by measuring the axial displacement of the central disk (103) of the sensor body (100), thereby calculating the torque on the amplification shaft (200).

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