Amplified phase difference type torque and rotating speed sensor, measuring method and testing system

Abstract

The invention discloses an amplification phase difference type torque rotating speed sensor, a measuring method and a testing system. The amplified phase difference type torque rotating speed sensor comprises a machine base, a cover plate, a cover plate bolt, a measuring shaft, a bearing, a bearing cover bolt, a bearing cover, a left measuring gear bolt, a left measuring gear, a left Hall sensor, a right measuring gear bolt, a speed increasing mechanism, an output gear, a right measuring gear basin and a right Hall sensor. The invention further provides a measuring method and a testing system of the amplifying phase difference type torque and rotating speed sensor, and the testing system comprises a speed regulating motor, a coupler, an input sensor, a mechanical transmission, an output sensor and a dynamometer. The range of measuring torque and power is enlarged, so that the measuring precision of the phase difference type torque and rotating speed sensor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to an amplified phase difference torque and speed sensor, a measuring method and a testing system. Background Art

[0002] The existing phase difference torque speed sensor is a common phase difference torque speed sensor, such as Figure 1 and Figure 2 As shown, it mainly consists of a machine base, a cover plate, a cover plate bolt, a bearing cover bolt, a sealing ring, a measuring shaft, a key, a bearing cover, a bearing, a left measuring gear bolt, a left measuring gear, a left Hall sensor, a right Hall sensor, a right measuring gear, a right measuring gear bolt and a positioning pin; keys are respectively arranged at both ends of the measuring shaft, the measuring shaft is supported on the cover plate through a bearing, the cover plate is fixed to the machine base by the cover plate bolts, the bearing cover is fixed to the cover plate by the bearing cover bolts, a sealing ring is arranged between the bearing cover and the cover plate, and the cover plate and the machine base are positioned by two positioning pins; the left measuring gear is fixed to the left side of the measuring shaft section L of the measuring shaft by the left measuring gear bolt, the left Hall sensor is fixed above the left measuring gear of the machine base, and there is a gap between the left Hall sensor and the left measuring gear; the right measuring gear is fixed to the right side of the measuring shaft section L of the measuring shaft by the right measuring gear bolt, the right Hall sensor is fixed above the right measuring gear of the machine base, and there is a gap between the right Hall sensor and the right measuring gear.

[0003] The ordinary phase difference torque and speed sensor is used to measure the torque, speed and power of the rotating shaft. During the measurement, the power of the measuring shaft rotation is input from the left end of the measuring shaft through the left key, and then output from the right end of the measuring shaft through the right key. The left measuring gear and the right measuring gear rotate with the measuring shaft. The left Hall sensor measures the speed of the measuring shaft through the left measuring gear. Since the measuring shaft is twisted by the torque, the right measuring gear has a torsion angle relative to the left measuring gear. The right Hall sensor measures the relative torsion angle of the right measuring gear relative to the left measuring gear through the right measuring gear, and obtains the relative torsion angle of the measuring shaft section L. Then, the torque transmitted by the measuring shaft is calculated based on the shaft diameter d and the material properties of the shaft. The power of the rotating shaft is then calculated by multiplying the measured torque and speed. The advantages of ordinary phase difference torque and speed sensors are non-contact measurement, good dynamic balance of the measuring shaft and the left measuring gear and the right measuring gear, and small temperature rise during measurement. However, due to its small measurable range during measurement, if the torsion angle generated by the right measuring gear relative to the left measuring gear is small, it is difficult to measure the torsion angle, that is, it is impossible to measure the torque of the measuring shaft and calculate the power. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is how to improve the measurement accuracy of a phase difference torque and speed sensor.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an amplified phase difference torque and speed sensor, which includes a machine base, a cover plate, a cover plate bolt, a measuring shaft, a bearing, a bearing cover bolt, a bearing cover, a left measuring gear bolt, a left measuring gear, a left Hall sensor, a right measuring gear bolt, a speed increasing mechanism, an output gear, a right measuring gear basin and a right Hall sensor, wherein the cover plate is arranged on the machine base through the cover plate bolt, the measuring shaft is arranged on the cover plate through the bearing, keys are arranged at both ends of the measuring shaft for connecting the measuring shaft, the bearing cover is arranged on the cover plate through the bearing cover bolt, the left measuring gear is arranged on the left side of the measuring section L of the measuring shaft through the left measuring gear bolt, the left Hall sensor is arranged above the left measuring gear of the machine base, the speed increasing mechanism is arranged on the right side of the measuring section L of the measuring shaft through the right measuring gear bolt, and is used to amplify the torsion angle of the measuring section L of the measuring shaft, the output gear is arranged on the speed increasing mechanism, the right measuring gear basin is arranged on the output gear, and the right Hall sensor is arranged above the right measuring gear basin of the machine base.

[0007] As a preferred solution of the amplified phase difference torque and speed sensor described in the present invention, the speed increasing mechanism is a fixed-axis gear mechanism, which includes a fixed-axis double-gear shaft bolt, two fixed-axis double-gear shafts, two fixed-axis double-gears and a driving gear. The two fixed-axis double-gear shafts are symmetrically arranged on the upper and lower sides of the left measuring gear through the fixed-axis double-gear shaft bolts, the two fixed-axis double-gears are respectively arranged on the two fixed-axis double-gear shafts, and the driving gear is arranged on the right side of the measuring section L of the measuring shaft through the right measuring gear bolt. The output gear is sleeved on the driving gear, and the driving gear is respectively meshed with the small gears of the two fixed-axis double-gears, and the output gear is respectively meshed with the large gears of the two fixed-axis double-gears, so as to realize the relative rotation angle of the measuring section L of the amplified measuring shaft, increase the measurement range of the torque and power of the measuring shaft, and thus improve the measurement accuracy of the phase difference torque and speed sensor.

[0008] As a preferred solution of the amplified phase difference torque and speed sensor described in the present invention, the speed increasing mechanism is a planetary gear mechanism, which includes an internal gear bolt, an internal gear, a tie rod, two planetary double gears, two tie rod covers and a tie rod cover bolt, the internal gear is arranged on the left measuring gear through the internal gear bolt, the tie rod is arranged on the right side of the measuring section L of the measuring shaft through the right measuring gear bolt, the two planetary double gears are respectively supported at the upper and lower ends of the tie rod, the two tie rod covers are arranged on the tie rod through the tie rod cover bolts, the output gear is sleeved on the tie rod, the internal gear is respectively meshed with the small gears of the two planetary double gears, and the output gear is respectively meshed with the large gears of the two planetary double gears, so as to realize the relative rotation angle of the measuring section L of the amplified measuring shaft, increase the measurement range of the torque and power of the measuring shaft, and thus improve the measurement accuracy of the phase difference torque and speed sensor.

[0009] As a preferred solution of the amplified phase difference torque and speed sensor described in the present invention, wherein: a positioning pin is arranged on the cover plate to play a positioning role to facilitate the installation of the cover plate, and a sealing ring is arranged between the bearing cover and the cover plate to play a certain sealing role to prevent dust and other impurities from entering the bearing cavity and affecting the normal operation of the bearing.

[0010] As a preferred solution of the amplified phase difference torque and speed sensor described in the present invention, an elastic retaining ring is arranged on the inner side of the right measuring tooth basin to play a limiting role to prevent the right measuring tooth basin from relative movement during rotation.

[0011] As a preferred solution of the amplified phase difference torque and speed sensor described in the present invention, the gap between the left Hall sensor and the left measuring gear is 1 to 2 mm, which avoids interference between the left Hall sensor and the left measuring gear, and the electrical signal generated by the left Hall sensor changes greatly, which is conducive to measurement; the gap between the right Hall sensor and the gear ring of the right measuring gear basin is 1 to 2 mm, which avoids interference between the right Hall sensor and the right measuring gear basin, and the electrical signal generated by the right Hall sensor changes greatly, which is conducive to measurement.

[0012] A method for measuring an amplified phase difference torque and speed sensor, using the amplified phase difference torque and speed sensor, comprises the following steps:

[0013] Step 1: Amplify the torsion angle of the measuring section L of the measuring shaft by a speed increasing mechanism;

[0014] Step 2: The relative torsion angle between the right measuring gear basin and the left measuring gear is obtained as φ / i by the phase difference of the voltage signal measured by the left Hall sensor and the right Hall sensor and the calibration relationship between the phase difference and the relative torsion angle between the right measuring gear basin and the left measuring gear, where φ is the torsion angle and i is the transmission ratio of the speed increasing mechanism;

[0015] Step 3: Calculate the transmission ratio i of the speed increasing mechanism to obtain the torsion angle φ of the right end of the measuring shaft segment L of the measuring shaft, that is, obtain the torsion angle of the right end of the measuring shaft segment L of the measuring shaft relative to the left end;

[0016] Step 4: Calculate the torque T transmitted by the measuring section L of the measuring shaft from the torsion angle φ of the right end of the measuring section L of the measuring shaft relative to the left end, that is, obtain the torque measured by the amplified phase difference torque and speed sensor;

[0017] Step 5: The speed n of the left measuring gear is calculated from the frequency of the voltage signal of the left Hall sensor, that is, the speed of the left end of the measuring section L of the measuring shaft is obtained, that is, the speed measured by the amplified phase difference torque speed sensor is obtained;

[0018] Step 6: The power P transmitted by the measuring section L of the measuring shaft is calculated from the torque T transmitted by the measuring section L of the measuring shaft and the speed n of the left end of the measuring section L of the measuring shaft, that is, the power measured by the amplified phase difference torque and speed sensor is obtained.

[0019] A test system comprises a speed regulating motor, a coupling, an input sensor, a mechanical transmission, an output sensor and a dynamometer, wherein the input end of the input sensor is connected to the speed regulating motor through the coupling, the output end of the input sensor is connected to the input end of the mechanical transmission through the coupling, the output end of the mechanical transmission is connected to the input end of the output sensor through the coupling, the output end of the output sensor is connected to the dynamometer through the coupling, and the input sensor and the output sensor are both fixed-axis gear mechanism amplified phase difference torque and speed sensors.

[0020] A test system comprises a speed regulating motor, a coupling, an input sensor, a mechanical transmission, an output sensor and a dynamometer, wherein the input end of the input sensor is connected to the speed regulating motor through the coupling, the output end of the input sensor is connected to the input end of the mechanical transmission through the coupling, the output end of the mechanical transmission is connected to the input end of the output sensor through the coupling, the output end of the output sensor is connected to the dynamometer through the coupling, and both the input sensor and the output sensor are planetary gear mechanism amplified phase difference torque and speed sensors.

[0021] A test system comprises a speed regulating motor, a coupling, an input sensor, a mechanical transmission, an output sensor and a dynamometer, wherein the input end of the input sensor is connected to the speed regulating motor through the coupling, the output end of the input sensor is connected to the input end of the mechanical transmission through the coupling, the output end of the mechanical transmission is connected to the input end of the output sensor through the coupling, the output end of the output sensor is connected to the dynamometer through the coupling, the input sensor is a fixed-axis gear mechanism amplified phase difference torque speed sensor, the output sensor is a planetary gear mechanism amplified phase difference torque speed sensor or the input sensor is a planetary gear mechanism amplified phase difference torque speed sensor, and the output sensor is a fixed-axis gear mechanism amplified phase difference torque speed sensor.

[0022] The beneficial effect of the present invention is that the right measuring gear in the ordinary phase difference torque and speed sensor is replaced by a speed increasing mechanism to increase the range of measuring torque and power, thereby improving the measurement accuracy of the phase difference torque and speed sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of a common phase difference torque and speed sensor.

[0025] Figure 2 for Figure 1 Section view along AA direction.

[0026] Figure 3 It is a schematic diagram of the overall structure of the fixed-axis gear mechanism amplified phase difference torque and speed sensor.

[0027] Figure 4 for Figure 3 Left view of .

[0028] Figure 5 for Figure 3 Cross-sectional view along BB direction.

[0029] Figure 6 for Figure 3 Sectional view along CC direction.

[0030] Figure 7 for Figure 3 Cross-sectional view in the DD direction.

[0031] Figure 8 for Figure 3 Top view of the .

[0032] Fig. 9 : is a relationship diagram of the left Hall sensor output voltage v1, the right Hall sensor output voltage v2 and the time difference Δt.

[0033] Fig.10 The schematic diagram of the fixed-axis gear mechanism amplifying the phase difference torque and speed sensor to increase the measurement range and improve the measurement accuracy.

[0034] Fig.11 This is the structural diagram of the planetary gear mechanism amplified phase difference torque and speed sensor.

[0035] Fig.12 for Fig.10 Cross-sectional view along EE direction.

[0036] Fig.13 for Fig.10 Cross-sectional view in the FF direction.

[0037] Fig.14 for Fig.10 Sectional view along the GG direction.

[0038] Fig.15 for Fig.10 Cross-sectional view along the HH direction.

[0039] Fig.16 Schematic diagram of the structure of the test system in Example 3.

[0040] Fig.17 This is a schematic diagram of the structure of the test system in Example 4.

[0041] Fig.18 This is a schematic diagram of the structure of the test system in Example 5.

[0042] Fig.19 This is a schematic diagram of the structure of another test system in Example 5.

[0043] In the figure: 1. base; 2. cover plate; 3. cover plate bolt; 4. bearing cover bolt; 5. sealing ring; 6. measuring shaft; 7. key; 8. bearing cover; 9. bearing; 10. left measuring gear bolt; 11. left measuring gear; 12. left Hall sensor; 13. right Hall sensor; 14. right measuring gear; 15. right measuring gear bolt; 16. fixed axis double gear shaft bolt; 17. fixed axis double gear shaft; 18. right measuring gear basin; 19. fixed axis double gear; 20. driving gear; 21. output gear; 22. elastic retaining ring; 23. positioning pin; 24. internal gear bolt; 25. internal gear; 26. planetary double gear; 27. tie rod cover; 28. tie rod; 29. ​​tie rod cover bolt; 30. speed regulating motor; 31. coupling; 32. input sensor; 33. mechanical transmission; 34. output sensor; 35. dynamometer. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0047] Example 1

[0048] Reference Figures 1 to 10, which is the first embodiment of the present invention, and provides an amplified phase difference torque speed sensor, which includes a base 1, a cover plate 2, a cover plate bolt 3, a measuring shaft 6, a bearing 9, a bearing cover bolt 4, a bearing cover 8, a left measuring gear bolt 10, a left measuring gear 11, a left Hall sensor 12, a right measuring gear bolt 15, a speed increasing mechanism, an output gear 21, a right measuring gear basin 18 and a right Hall sensor 13. The cover plate 2 is arranged on the base 1 through the cover plate bolt 3, the measuring shaft 6 is arranged on the cover plate 2 through the bearing 9, keys 7 are arranged at both ends of the measuring shaft 6 for connecting the measuring shaft 6, the bearing cover 8 is arranged on the cover plate 2 through the bearing cover bolt 4, and the left measuring gear 11 is arranged on the measuring section L of the measuring shaft 6 through the left measuring gear bolt 10. On the left side, the left Hall sensor 12 is arranged above the left measuring gear 11 of the machine base 1, the speed increasing mechanism is arranged on the right side of the measuring section L of the measuring shaft 6 through the right measuring gear bolt 15, and is used to amplify the relative rotation angle of the measuring section L of the measuring shaft 6, the output gear 21 is arranged on the speed increasing mechanism, the right measuring gear basin 18 is arranged on the output gear 21, and the right Hall sensor 13 is arranged above the right measuring gear basin 18 of the machine base 1; a locating pin 23 is arranged on the cover plate 2, and an elastic retaining ring 22 is arranged on the inner side of the right measuring gear basin 18, the gap between the left Hall sensor 12 and the left measuring gear 11 is 1 to 2 mm, the gap between the right Hall sensor 13 and the gear ring of the right measuring gear basin 18 is 1 to 2 mm, and a sealing ring 5 is arranged between the bearing cover 8 and the cover plate 2.

[0049] The base 1 serves as the installation base of the entire amplified phase difference torque and speed sensor. A cover plate 2 is installed on the base 1 through a cover plate bolt 3 to form a square housing. Furthermore, in this embodiment, a positioning pin 23 is installed on the cover plate 2. During installation, the cover plate 2 can be positioned by the positioning pin 23 first, and then the cover plate bolt 3 is installed to facilitate the rapid installation of the cover plate 2; the measuring shaft 6 is rotatably installed on the cover plate 2 through a bearing 9, and the measuring shaft 6 runs through the entire square housing. Keys 7 are provided at both ends of the measuring shaft 6 to facilitate the connection of the front and rear ends of the measuring shaft 6. Bearing covers 8 are installed on the cover plate 2 at both ends of the measuring shaft 6 through bearing cover bolts 4 to achieve alignment of the bearing 9 In addition, a sealing ring 5 is installed between the bearing cover 8 and the cover plate 2 in this embodiment to further seal the bearing cover 8 and prevent dust and other impurities from entering the bearing cavity and affecting the normal operation of the bearing 9. A left measuring gear 11 is fixedly installed on the left side of the measuring section L of the measuring shaft 6 in the square housing through a left measuring gear bolt 10, and a left Hall sensor 12 is correspondingly installed on the base 1 above the left measuring gear 11 to measure the rotation speed of the left measuring gear 11. Furthermore, in this embodiment, the gap between the left Hall sensor 12 and the left measuring gear 11 is designed to be 1-2 mm to prevent the left Hall sensor 12 from being in contact with the left Hall sensor 12. Interference is generated between the left measuring gears 11, and the electrical signal generated by the left Hall sensor 12 changes greatly, which is conducive to measurement; an increasing mechanism is installed on the right side of the measuring section L of the measuring shaft 6 through the right measuring gear bolt 15, and the increasing mechanism can amplify the torsion angle of the measuring section L of the measuring shaft 6 to increase the range of measuring torque and power, thereby improving the measurement accuracy of the phase difference torque and speed sensor; an output gear 21 is installed on the increasing mechanism, and a right measuring gear basin 18 is installed on the output gear 21 by welding. The outer edge of the right measuring gear basin 18 has a gear ring as a measuring gear; the number of teeth of the left measuring gear 11 is equal to that of the right measuring gear basin 18, The structure of the gear ring part is identical and symmetrical. A corresponding right Hall sensor 13 is installed on the machine base 1 above the right measuring gear basin 18 to measure the rotational speed of the right measuring gear basin 18. Furthermore, in this embodiment, the gap between the right Hall sensor 13 and the right measuring gear basin 18 is designed to be 1 to 2 mm to avoid interference between the right Hall sensor 13 and the right measuring gear basin 18, and the electrical signal generated by the right Hall sensor 13 changes greatly, which is conducive to measurement; further, in this embodiment, an elastic retaining ring 22 is installed on the inner side of the right measuring gear basin 18 to play a limiting role to avoid relative movement of the right measuring gear basin 18 during rotation.

[0050] Specifically, the speed increasing mechanism is a fixed-axis gear mechanism, which includes a fixed-axis double-gear shaft bolt 16, two fixed-axis double-gear shafts 17, two fixed-axis double-gear shafts 19 and a driving gear 20. The two fixed-axis double-gear shafts 17 are symmetrically arranged on the upper and lower sides of the left measuring gear 11 through the fixed-axis double-gear shaft bolts 16. The two fixed-axis double-gear shafts 19 are respectively arranged on the two fixed-axis double-gear shafts 17. The driving gear 20 is arranged on the right side of the measuring section L of the measuring shaft 6 through the right measuring gear bolt 15. The output gear 21 is sleeved on the driving gear 20. The driving gear 20 is respectively meshed with the small gears of the two fixed-axis double-gear shafts 19, and the output gear 21 is respectively meshed with the large gears of the two fixed-axis double-gear shafts 19.

[0051] The speed increasing mechanism in this embodiment is a fixed-axis gear mechanism, which replaces the right measuring gear 14 in the ordinary phase difference torque and speed sensor to form a fixed-axis gear mechanism amplified phase difference torque and speed sensor, which is mainly composed of a fixed-axis double-linked gear shaft bolt 16, two fixed-axis double-linked gear shafts 17, two fixed-axis double-linked gears 19 and a driving gear 20. The two fixed-axis double-linked gear shafts 17 are symmetrically installed on the upper and lower sides of the left measuring gear 11 through the fixed-axis double-linked gear shaft bolts 16. The two fixed-axis double-linked gears 19 are respectively mounted on the ends of the two fixed-axis double-linked gear shafts 17 away from the left measuring gear 11 to ensure the dynamic balance of the entire fixed-axis gear mechanism amplified phase difference torque and speed sensor. The left side of the fixed-axis double-linked gear 19 is connected to the fixed-axis double-linked gear shaft 16. The limit block on 17 is limited, the right side of the fixed-axis double gear 19 is limited by the right measuring gear basin 18, and a driving gear 20 is fixedly installed on the right side of the measuring section L of the measuring shaft 6 by the right measuring gear bolt 15, and the driving gear 20 is respectively meshed with the small gears of the two fixed-axis double gears 19, and the output gear 21 is sleeved on the driving gear 20, and the output gear 21 is respectively meshed with the large gears of the two fixed-axis double gears 19 to achieve the amplification of the relative rotation angle of the measuring section L of the measuring shaft 6, increase the measurement range of the torque and power of the measuring shaft 6, thereby improving the measurement accuracy of the phase difference torque and speed sensor. It should be noted that, in addition to the fixed-axis gear mechanism, the speed increasing mechanism can also adopt other mechanisms that can amplify the torsion angle of the measuring section L of the measuring shaft 6.

[0052] During operation, the measuring shaft 6 drives the driving gear 20 to rotate and input, the driving gear 20 drives the fixed axis double gear 19 to rotate through the small gear of the fixed axis double gear 19, and the fixed axis double gear 19 drives the output gear 21 to rotate and output through the large gear. The number of teeth of the driving gear 20 in this embodiment is Z 20 , the number of teeth of the pinion of the fixed axis double gear 19 is Z 19-20 The number of teeth of the large gear of the fixed axis double gear 19 is Z 19-21 , the number of teeth of output gear 21 is Z 21, according to the calculation method of the transmission ratio of the fixed-axis gear train, the transmission ratio i between the driving gear 20 and the output gear 21 is

[0053]

[0054] In this embodiment, the number of teeth of the driving gear 20 is greater than that of the small gear of the fixed-axis double gear 19, and the number of teeth of the large gear of the fixed-axis double gear 19 is greater than that of the output gear 21, so that the transmission ratio i between the driving gear 20 and the output gear 21 is greater than zero and less than 1, that is, 0 < i < 1, which means that the rotational speed increases from the driving gear 20 to the output gear 21. In addition, the rotation directions of the driving gear 20 and the output gear 21 are the same, the center distances of the two pairs of meshing gears are the same, and the module numbers of the driving gear 20, the fixed-axis double gear 19 and the output gear 21 are the same to ensure the correct meshing of the gears in the fixed-axis gear speed increasing mechanism.

[0055] Principle of measuring rotational speed by the fixed-axis gear mechanism amplified phase difference type torque rotational speed sensor: The left measuring gear 11 is below the left Hall sensor 12. When the left measuring gear 11 rotates with the measuring shaft 6, the magnetic induction intensity in the left Hall sensor 12 changes, and a fluctuating voltage that changes with time t is output, as Fig. 9 shown by v1 in. When the left measuring gear 11 rotates one circle, the number of voltage peaks is equal to the number of teeth of the left measuring gear. The rotational speed of the left measuring gear 11 can be obtained:

[0056]

[0057] In the formula, f is the frequency of the output voltage of the left Hall sensor 12 or the right Hall sensor 13, and z is the number of teeth of the left measuring gear 11 or the right measuring gear 18.

[0058] The number of teeth z of the left measuring gear 11 is determined when designing the left measuring gear 11 and is a known quantity. After measuring the frequency f of the output voltage of the left Hall sensor 12, the rotational speed n of the left measuring gear 11 can be calculated from Equation (2). The left measuring gear 11 is fixed on the measuring shaft 6, that is, the rotational speed of the measuring shaft 6 is indirectly measured.

[0059] Principle of measuring torque by the fixed-axis gear mechanism amplified phase difference type torque rotational speed sensor: During the test, power and motion are input from the left end of the measuring shaft 6 and output from the right end of the measuring shaft 6; when the measuring shaft 6 rotates, the left Hall sensor 12 outputs voltage v1, and the right Hall sensor 13 outputs voltage v2, as Fig. 9As shown by v1 and v2 in the figure, due to the torsion of the measuring shaft 6, there is a relative torsion angle φ / i between the right measuring tooth basin 18 and the left measuring gear 11. Here, i is the transmission ratio between the driving gear 20 and the right measuring tooth basin 18, which is also the transmission ratio of the fixed-axis gear speed-increasing mechanism, and 0 < i < 1. The transmission ratio between the driving gear 20 and the right measuring tooth basin 18 is equal to the rotation angle ratio between the driving gear 20 and the right measuring tooth basin 18. φ is the relative torsion angle of the measuring section L of the measuring shaft 6, and φ / i > φ. The fixed-axis gear speed-increasing mechanism amplifies the relative torsion angle φ of the measuring section L of the measuring shaft 6. Also, because the left Hall sensor 12 is the same as the right Hall sensor 13, the tooth rings of the right measuring tooth basin 18 and the left measuring gear 11 are installed in parallel, and due to the torsion of the measuring shaft 6, there is a time difference Δt between the output voltage v2 and the output voltage v1, as Fig. 9 As shown by Δt in the figure, for the rotating right measuring tooth basin 18 and left measuring gear 11, it is manifested as the phase difference between the output voltage v2 and the output voltage v1. Since the fixed-axis gear speed-increasing mechanism amplifies the relative torsion angle φ of the measuring section L of the measuring shaft 6, the phase difference between the output voltage v2 and the output voltage v1 is amplified, which facilitates the measurement of the phase difference and improves the measurement accuracy of the phase difference. That is, according to the output voltage v1 and the output voltage v2, through the phase detection circuit, the phase difference between the output voltage v2 and the output voltage v1 can be measured. Then, based on the calibration relationship between the phase difference between the output voltage v2 and the output voltage v1 and the relative torsion angle between the right measuring tooth basin 18 and the left measuring gear 11, the relative torsion angle between the right measuring tooth basin 18 and the left measuring gear 11 is φ / i. Multiplying φ / i by i gives the torsion angle φ of the driving gear 20 relative to the left measuring gear 11, which is also the relative torsion angle φ of the measuring section L of the measuring shaft 6.

[0060] According to the mechanics of materials, the torque in the shaft of the measuring section L of the measuring shaft is:

[0061]

[0062] In the formula, d is the diameter of the measuring section L of the measuring shaft 6, L is the length of the measuring section L of the measuring shaft 6, and G is the shear elastic modulus of the material of the measuring shaft 6.

[0063] The diameter d and length L of the measuring section L of the measuring shaft 6 are determined by the design and are known quantities. The shear elastic modulus G can be obtained from the mechanical design manual or through experiments. In this way, the torque T in the shaft of the measuring section L of the measuring shaft 6 can be calculated from Equation (3), which is also the measuring torque of the torque and speed sensor with amplified phase difference by the fixed-axis gear mechanism.

[0064] The principle of measuring power by the torque and speed sensor with amplified phase difference by the fixed-axis gear mechanism: According to theoretical mechanics, the power transmitted by the measuring shaft is:

[0065]

[0066] After measuring the rotation speed n of the measuring shaft 6 and the torque T in the measuring section L of the measuring shaft 6, the power transmitted by the measuring shaft 6 is calculated by formula (4), that is, the measurement power of the fixed-axis gear mechanism amplified phase difference torque speed sensor is obtained.

[0067] The comparison method can be further used to illustrate the principle that the fixed-axis gear mechanism amplified phase difference torque and speed sensor increases the range of torque and power measurement and improves the accuracy of torque and power measurement:

[0068] Ordinary phase difference torque speed sensor has no gear speed increasing mechanism, and the maximum torque that can be measured is set to T max The corresponding torsion angle of the right measuring gear 14 relative to the left measuring gear 11 is φ 0max ; The minimum torque that can be measured can be set to T 0min The corresponding torsion angle of the right measuring gear 14 relative to the left measuring gear 11 is φ 0min ; Then the measurable torque range is [T 0min , T max ], the corresponding torsion angle range of the right measuring gear 14 relative to the left measuring gear 11 is [φ 0min ,φ 0max ], which is also the range of the torsion angle of the measuring section L of the measuring shaft 6, such as Fig.10 shown.

[0069] The fixed axis gear amplification phase difference torque speed sensor has a fixed axis gear speed increasing mechanism, and the maximum torque measured can be set to T max The corresponding torsion angle of the right measuring gear 18 relative to the left measuring gear 11 is φ imax ; The minimum torque that can be measured can be set to T imin The corresponding torsion angle of the right measuring gear 18 relative to the left measuring gear 11 is φ imin ; Then the measurable torque range is [T imin , T max ], the corresponding torsion angle range of the right measuring gear pot 18 relative to the left measuring gear 11 is [φ imin ,φ imax ],like Fig.10 shown.

[0070] Since the number of teeth of the left measuring gear 11 and the right measuring gear 18 are equal, the structure of the gear ring parts is the same and parallel, and since the number of teeth of the left measuring gear 11 and the right measuring gear 14 are equal, the structure of the gear ring parts is the same, the right Hall sensor 13 can measure the minimum torsion angle φ of the right measuring gear 18 relative to the left measuring gear 11 imin The minimum torsion angle φ of the right measuring gear 14 relative to the left measuring gear 11 0min Equal, that is, φ imin =φ0min , the fixed-axis gear amplified phase difference torque and speed sensor has a fixed-axis gear speed increasing mechanism, and the minimum torsional angle of the measuring section L of the measuring shaft 6 that can be measured is φ imin i, and since 0 < i < 1, then φ imin i < φ 0min , φ imin i corresponds to the minimum measurable torque of T imin , according to Equation (3), T imin < T 0min , then the measurable torque range [T imin , T max of the fixed-axis gear amplified phase difference torque and speed sensor is greater than the measurable torque range [T 0min , T max of the ordinary phase difference type torque and speed sensor, that is, the fixed-axis gear mechanism amplified phase difference torque and speed sensor increases the measurable torque range; according to Equation (4), when the measurable torque range increases, the measurable power range also increases accordingly, that is, the fixed-axis gear mechanism amplified phase difference torque and speed sensor also increases the measurable power range, the maximum measurable torque and power remain unchanged, and the minimum measurable torque and minimum power become smaller.

[0071] Within the measurement range, the torsional angle range of the right measurement gear 14 relative to the left measurement gear 11 is [φ 0min , φ 0max , the torsional angle range of the right measurement gear basin 18 relative to the left measurement gear 11 is [φ imin , φ imax , φ imax is i times of φ 0max . The driving gear 20, the fixed-axis double gear 19 and the output gear 21 form a fixed-axis gear speed increasing mechanism. The transmission ratio i between the driving gear 20 and the right measurement gear basin 18 is greater than zero and less than 1, that is, 0 < i < 1. The rotation angle ratio of the right measurement gear basin 18 relative to the driving gear 20 is 1 / i, and the rotation angle of the right measurement gear basin 18 relative to the driving gear 20 is greater than 1. Therefore, the fixed-axis gear amplified phase difference torque and speed sensor has a larger torsional angle of the right gear ring relative to the left gear ring than the ordinary phase difference type torque and speed sensor, that is, a larger relative torsional angle, which is easy to measure and easy to obtain higher measurement accuracy. For example, it is easier to read when measuring 5 degrees than measuring 0.05 degrees, and the measurement accuracy is high. That is, the fixed-axis gear mechanism amplified phase difference torque and speed sensor improves the measurement accuracy of torque and power.

[0072] As Figure 3 shown, the number of teeth of the driving gear 20 and the pinion of the fixed-axis double gear 19 in this embodiment are set to 80 and 40 respectively. Then Z 20 = 80, Z 19-20=40, the number of teeth of the large gear of the fixed axis double gear 19 and the output gear 21 are 80 and 40 respectively, then Z 19-21 =80, Z 21 =40, according to formula (1), the transmission ratio between the driving gear 20 and the right measuring gear pot 18 is i=40×40 / (80×80)=1 / 4, the rotation angle ratio of the right measuring gear pot 18 to the driving gear 20 is 4, and the minimum torsion angle of the measuring section L of the measuring shaft 6 that can be measured is φ imin i=φ 0max / 4=0.25φ 0max ,φ imin i and T imin Corresponding, φ 0max With T 0min Correspondingly, according to formula (3), we can get T imin =0.25T 0min , that is, T imin <T 0min According to formula (4), we can get P imin =0.25P 0min , that is, P imin <P 0min , where P imin is the minimum power that can be measured by the fixed-axis gear amplified phase difference torque speed sensor, P 0min It is the minimum power that can be measured by an ordinary phase difference torque speed sensor. It can be seen that the fixed-axis gear mechanism amplified phase difference torque speed sensor increases the range of measuring torque and power, thereby improving the accuracy of measuring torque and power.

[0073] In other embodiments, the left Hall sensor 12 and the right Hall sensor 13 are replaced with photoelectric sensors, and code disks are set on the left measuring gear 11 and the right measuring gear pot 18 to form an encoder, and the encoder can also be used to measure the torque, speed and power of the measuring shaft.

[0074] Example 2

[0075] Reference Figures 11 to 15, which is the second embodiment of the present invention. The difference between this embodiment and embodiment 1 lies in the specific structure of the speed increasing mechanism. The speed increasing mechanism in this embodiment is a planetary gear mechanism, which includes an internal gear bolt 24, an internal gear 25, a tie rod 28, two planetary double gears 26, two tie rod covers 27 and a tie rod cover bolt 29. The internal gear 25 is arranged on the left measuring gear 11 through the internal gear bolt 24, and the tie rod 28 is arranged on the right side of the measuring section L of the measuring shaft 6 through the right measuring gear bolt 15. The two planetary double gears 26 are respectively supported at the upper and lower ends of the tie rod 28, and the two tie rod covers 27 are arranged on the tie rod 28 through the tie rod cover bolt 29. The output gear 21 is sleeved on the tie rod 28, and the internal gear 25 is respectively meshed with the small gears of the two planetary double gears 26, and the output gear 21 is respectively meshed with the large gears of the two planetary double gears 26.

[0076] The speed increasing mechanism in this embodiment is a planetary gear mechanism, which is formed as a planetary gear mechanism amplified phase difference torque speed sensor, which is mainly composed of an internal gear bolt 24, an internal gear 25, a tie rod 28, two planetary double gears 26, two tie rod covers 27 and a tie rod cover bolt 29. The internal gear 25 is fixedly installed on the left measuring gear 11 by the internal gear bolt 24, the measuring shaft 6 passes through the internal gear 25, and the tie rod 28 is fixedly installed on the right side of the measuring section L of the measuring shaft 6 by the right measuring gear bolt 15. The planetary double gears 26 are supported at the upper and lower ends of the tie rod 28, and the tie rod covers 27 are fixedly installed at both ends of the tie rod 28 by the tie rod cover bolts 29, so that the planetary double gears 26 are fixed on the tie rod. The two ends of 28 can rotate freely, and the planetary gear mechanism adopts a symmetrical arrangement to ensure the dynamic balance of the entire fixed-axis gear mechanism to amplify the phase difference torque and speed sensor. The output gear 21 is mounted on the tie rod of the measuring shaft 6, and the internal gear 25 is respectively meshed with the small gears of the two planetary double gears 26, and the output gear 21 is respectively meshed with the large gears of the two planetary double gears 26 to achieve the amplification of the relative rotation angle of the measuring section L of the measuring shaft 6, increase the measurement range of the torque and power of the measuring shaft 6, and thus improve the measurement accuracy of the phase difference torque and speed sensor; it should be noted that in addition to the planetary gear mechanism, the speed increasing mechanism can also adopt other mechanisms that can amplify the torsion angle of the measuring section L of the measuring shaft 6.

[0077] During operation, the measuring shaft 6 drives the tie rod 28 to rotate input, the tie rod 28 drives the planetary double gear 26 to rotate, the large gear of the planetary double gear 26 drives the output gear 21 to rotate output, and the internal gear 25 meshes with the small gear of the planetary double gear 26 to constrain the movement of the planetary double gear 26. The number of teeth of the internal gear 25 in this embodiment is Z 25 The number of teeth of the pinion of the planetary double gear 26 is Z 26-25 The number of teeth of the large gear of the planetary double gear 26 is Z 26-21, the number of teeth of the output gear 21 is Z 21 , according to the calculation method of the transmission ratio of the fixed-axis gear train, the transmission ratio i between the connecting rod 28 and the output gear 21 is

[0078]

[0079] Since the denominator of Equation (5) has one more term Z than the numerator 25 Z 26-21 , the transmission ratio i between the connecting rod 28 and the output gear 21 is greater than zero and less than 1, that is, 0 < i < 1, which means that the rotational speed from the connecting rod 28 to the output gear 21 increases. In addition, the rotational directions of the connecting rod 28 and the output gear 21 are the same, and the moduli of the internal gear 25, the planetary double gear 26, and the output gear 21 are the same to ensure the correct meshing of the gears in the planetary gear speed increasing mechanism.

[0080] As Fig.11 shown, in this embodiment, the number of teeth of the internal gear 25 and the small gear of the planetary double gear 26 are 160 and 40 respectively, that is, Z 25 = 160, Z 26-25 = 40, the number of teeth of the large gear of the planetary double gear 26 and the output gear 21 are 80 and 40 respectively, that is, Z 26-21 = 80, Z 21 = 40. According to Equation (5), the transmission ratio i between the connecting rod 28 and the output gear 21 is i = 40×40 / (160×80 + 40×40) = 1 / 9. Since the right measuring tooth basin 18 is fixedly connected to the output gear 21, the angle ratio between the right measuring tooth basin 18 and the connecting rod 28 is the reciprocal of the transmission ratio between the connecting rod 28 and the output gear 21, that is, the angle ratio between the right measuring tooth basin 18 and the connecting rod 28 is 9.

[0081] It should be noted that the measuring principles of the rotational speed, torque, and power of the planetary gear mechanism amplified phase difference type torque rotational speed sensor and the fixed-axis gear mechanism amplified phase difference type torque rotational speed sensor in Embodiment 1 are the same, so no further elaboration will be provided here.

[0082] Embodiment 3

[0083] Referring to Figures 1 to 15 , this is the third embodiment of the present invention. This embodiment provides a measuring method for an amplified phase difference type torque rotational speed sensor. This method uses the amplified phase difference type torque rotational speed sensor in Embodiment 1, and the steps are as follows:

[0084] Step 1: Amplify the torsional angle of the measuring section L of the measuring shaft 6 through a speed increasing mechanism

[0085] Step 2: The phase difference of the voltage signal measured by the left Hall sensor 12 and the right Hall sensor 13 is used, and the relative torsion angle between the right measuring tooth basin 18 and the left measuring gear 11 is calibrated to obtain φ / i, where φ is the torsion angle and i is the transmission ratio of the speed increasing mechanism.

[0086] Step 3: Obtain the torsion angle of the right end of the measuring shaft segment L of the measuring shaft 6 through the transmission ratio of the speed increasing mechanism, that is, obtain the torsion angle of the right end of the measuring shaft segment L of the measuring shaft 6 relative to the left end;

[0087] Step 4: Calculate the torque transmitted by the measuring section L of the measuring shaft 6 from the torsion angle of the right end of the measuring section L of the measuring shaft 6 relative to the left end, that is, obtain the torque measured by the amplified phase difference torque and speed sensor;

[0088] Step 5: Obtain the rotation speed of the left measuring gear 11 from the frequency of the voltage signal of the left Hall sensor 12, that is, obtain the rotation speed of the left end of the measuring section L of the measuring shaft 6, that is, obtain the rotation speed measured by the amplified phase difference torque speed sensor;

[0089] Step 6: The power transmitted by the measuring section L of the measuring shaft 6 is calculated from the torque transmitted by the measuring section L of the measuring shaft 6 and the speed of the left end of the measuring section L of the measuring shaft 6, that is, the power measured by the amplified phase difference torque and speed sensor is obtained.

[0090] It should be noted that the above-mentioned speed increasing mechanism may be a fixed-axis gear mechanism, a planetary gear mechanism or other speed increasing mechanisms. This embodiment takes a fixed-axis gear mechanism as an example:

[0091] Step 1: The measuring shaft 6 drives the driving gear 20 to rotate the input, the driving gear 20 drives the fixed-axis double gear 19 to rotate through the small gear of the fixed-axis double gear 19, and the fixed-axis double gear 19 drives the output gear 21 to rotate the output through the large gear, so as to amplify the torsion angle of the measuring section L of the measuring shaft 6;

[0092] Step 2: When the measuring shaft 6 rotates, the left Hall sensor 12 outputs a voltage v1, and the right Hall sensor 13 outputs a voltage v2. The phase difference measured by the output voltage v2 and the output voltage v1 is Δt. Then, from the calibration relationship between the phase difference between the output voltage v2 and the output voltage v1 and the relative torsion angle between the right measuring tooth basin 18 and the left measuring gear 11, the relative torsion angle between the right measuring tooth basin 18 and the left measuring gear 11 is φ / i.

[0093] Step 3: Calculate the transmission ratio i of the speed increasing mechanism and set the number of teeth of the driving gear 20 to Z 20 , the number of teeth of the pinion of the fixed axis double gear 19 is Z 19-20 The number of teeth of the large gear of the fixed axis double gear 19 is Z19-21 , the number of teeth of output gear 21 is Z 21 According to the calculation method of the fixed-axis gear train transmission ratio, the transmission ratio i between the driving gear 20 and the output gear 21 is

[0094]

[0095] The torsion angle φ of the right end of the measuring shaft segment L of the measuring shaft 6 can be obtained, that is, the torsion angle of the right end of the measuring shaft segment L of the measuring shaft 6 relative to the left end can be obtained;

[0096] Step 4: From the material mechanics, the torque in the measuring section L of the measuring shaft is obtained:

[0097]

[0098] Wherein, d is the diameter of the measuring section L of the measuring shaft 6, L is the length of the measuring section L of the measuring shaft 6, and G is the shear elastic modulus of the material of the measuring shaft 6;

[0099] The diameter d and length L of the measuring section L of the measuring shaft 6 are determined by design and are known quantities. The shear elastic modulus G can be found in the mechanical design manual or obtained by experiment. Thus, the torque T in the measuring section L of the measuring shaft 6 can be calculated by formula (3), that is, the measured torque of the fixed-axis gear mechanism amplified phase difference torque and speed sensor can be obtained;

[0100] Step 5: When the left measuring gear 11 rotates with the measuring shaft 6, the magnetic induction intensity in the left Hall sensor 12 changes, and the output fluctuates with time t, such as Fig. 9 As shown in v1, when the left measuring gear 11 rotates one circle, the number of voltage peaks is equal to the number of teeth of the left measuring gear. The rotation speed of the left measuring gear 11 can be obtained as:

[0101]

[0102] In the formula, f is the frequency of the output voltage of the left Hall sensor 12 or the right Hall sensor 13, and z is the number of teeth of the left measuring gear 11 or the right measuring gear pot 18.

[0103] The number of teeth z of the left measuring gear 11 is determined when designing the left measuring gear 11 and is a known quantity. After measuring the frequency f of the output voltage of the left Hall sensor 12, the rotation speed n of the left measuring gear 11 can be calculated by formula (2). The left measuring gear 11 is fixed on the measuring shaft 6, that is, the rotation speed of the measuring shaft 6 is indirectly measured.

[0104] Step 6: According to theoretical mechanics, measure the power transmitted by axis 6:

[0105]

[0106] After measuring the torque T and speed n in the measuring section L of the shaft 6, the power transmitted by the measuring shaft 6 is calculated by formula (4), that is, the measured power of the fixed-axis gear mechanism amplified phase difference torque speed sensor is obtained.

[0107] Example 4

[0108] Reference Fig.16 , which is the fourth embodiment of the present invention, this embodiment provides a test system, including a speed regulating motor 30, a coupling 31, an input sensor 32, a mechanical transmission 33, an output sensor 34 and a dynamometer 35, the input end of the input sensor 32 is connected to the speed regulating motor 30 through the coupling 31, the output end of the input sensor 32 is connected to the input end of the mechanical transmission 33 through the coupling 31, the output end of the mechanical transmission 33 is connected to the input end of the output sensor 34 through the coupling 31, the output end of the output sensor 34 is connected to the dynamometer 35 through the coupling 31, and the input sensor 32 and the output sensor 34 are both fixed-axis gear mechanism amplified phase difference torque and speed sensors.

[0109] The test system in this embodiment is a test bench for the transmission efficiency of a mechanical transmission 33, which is mainly used to test the transmission efficiency of the mechanical transmission 33. The speed regulating motor 30, the input sensor 32, the mechanical transmission 33, the output sensor 34 and the dynamometer 35 are connected in series through a coupling 31 to form a series test system, wherein the speed regulating motor 30 is used as a driving device, inputs power and motion, and transmits it to the input sensor 32, the mechanical transmission 33, the output sensor 34 and the dynamometer 35, and the dynamometer 35 consumes power; the transmission efficiency of the mechanical transmission 33 is its output shaft power divided by the input shaft power, and the input and output shaft powers of the mechanical transmission 33 are respectively obtained by dividing the input sensor 32 by the output shaft power and the output shaft power of the mechanical transmission 33 by ... The power measured by the input sensor 32 and the output sensor 34 can be obtained by changing the speed of the speed regulating motor 30, and the power measured by the input sensor 32 and the output sensor 34 at different speeds can be obtained, and the transmission efficiency of the mechanical transmission 33 at different speeds can be further obtained. The transmission efficiency of the mechanical transmission 33 at different speeds and gears can also be obtained by changing the gear of the mechanical transmission 33. The specific types of the input sensor 32 and the output sensor 34 can be selected accordingly according to actual test requirements. The input sensor 32 and the output sensor 34 in this embodiment are both fixed-axis gear mechanism amplified phase difference torque speed sensors to achieve the best test effect.

[0110] Example 5

[0111] Reference Fig.17, which is the fifth embodiment of the present invention. The difference between this embodiment and embodiment 3 lies in the types of the input sensor 32 and the output sensor 34. The input sensor 32 and the output sensor 34 in this embodiment are both planetary gear mechanism amplified phase difference torque speed sensors, which have achieved the best test effect.

[0112] Example 6

[0113] Reference Fig.18 and Fig.19 , which is the sixth embodiment of the present invention. The difference between this embodiment and embodiments 3 and 4 lies in the types of the input sensor 32 and the output sensor 34. The input sensor 32 in this embodiment is a fixed-axis gear mechanism amplified phase difference torque speed sensor, and the output sensor 34 is a planetary gear mechanism amplified phase difference torque speed sensor, or the input sensor 32 is a planetary gear mechanism amplified phase difference torque speed sensor, and the output sensor 34 is a fixed-axis gear mechanism amplified phase difference torque speed sensor, so as to achieve the best test effect.

[0114] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An amplified phase difference torque and speed sensor, characterized in that: The invention comprises a machine base (1), a cover plate (2), a cover plate bolt (3), a measuring shaft (6), a bearing (9), a bearing cover bolt (4), a bearing cover (8), a left measuring gear bolt (10), a left measuring gear (11), a left Hall sensor (12), a right measuring gear bolt (15), a speed increasing mechanism, an output gear (21), a right measuring gear basin (18) and a right Hall sensor (13), wherein the cover plate (2) is arranged on the machine base (1) via the cover plate bolt (3), the measuring shaft (6) is arranged on the cover plate (2) via the bearing (9), keys (7) are arranged at both ends of the measuring shaft (6) for connecting the measuring shaft, and the bearing cover (8) is connected via the bearing cover bolt ( 4) is arranged on the cover plate (2), the left measuring gear (11) is arranged on the left side of the measuring section L of the measuring shaft (6) through the left measuring gear bolt (10), the left Hall sensor (12) is arranged above the left measuring gear (11) of the machine base (1), the speed increasing mechanism is arranged on the right side of the measuring section L of the measuring shaft (6) through the right measuring gear bolt (15), and is used to amplify the torsion angle of the measuring section L of the measuring shaft, the output gear (21) is arranged on the speed increasing mechanism, the right measuring gear basin (18) is arranged on the output gear (21), and the right Hall sensor (13) is arranged above the right measuring gear basin (18) of the machine base (1).

2. The amplified phase difference torque and speed sensor according to claim 1, characterized in that: The speed increasing mechanism is a fixed-axis gear mechanism, which comprises a fixed-axis double-linked gear shaft bolt (16), two fixed-axis double-linked gear shafts (17), two fixed-axis double-linked gears (19) and a driving gear (20). The two fixed-axis double-linked gear shafts (17) are symmetrically arranged on the upper and lower sides of the left measuring gear (11) through the fixed-axis double-linked gear shaft bolt (16). The two fixed-axis double-linked gears (19) are respectively arranged on the two fixed-axis double-linked gear shafts (17). The driving gear (20) is arranged on the right side of the measuring section L of the measuring shaft (6) through the right measuring gear bolt (15). The output gear (21) is sleeved on the driving gear (20). The driving gear (20) is respectively meshed with the small gears of the two fixed-axis double-linked gears (19), and the output gear (21) is respectively meshed with the large gears of the two fixed-axis double-linked gears (19).

3. The amplified phase difference torque and speed sensor according to claim 1, characterized in that: The speed increasing mechanism is a planetary gear mechanism, which comprises an internal gear bolt (24), an internal gear (25), a tie rod (28), two planetary double gears (26), two tie rod covers (27) and a tie rod cover bolt (29); the internal gear (25) is arranged on the left measuring gear (11) through the internal gear bolt (24); the tie rod (28) is arranged on the right side of the measuring section L of the measuring shaft (6) through the right measuring gear bolt (15); the two planetary double gears (26) are respectively supported on the upper and lower ends of the tie rod (28); the two tie rod covers (27) are arranged on the tie rod (28) through the tie rod cover bolt (29); the output gear (21) is sleeved on the tie rod (28); the internal gear (25) is respectively meshed with the small gears of the two planetary double gears (26); and the output gear (21) is respectively meshed with the large gears of the two planetary double gears (26).

4. The amplified phase difference torque and speed sensor according to claim 1, characterized in that: A positioning pin (23) is provided on the cover plate, and a sealing ring (5) is provided between the bearing cover and the cover plate.

5. The amplified phase difference torque and speed sensor according to claim 1, characterized in that: An elastic retaining ring (22) is arranged on the inner side of the right measuring tooth basin.

6. The amplified phase difference torque and speed sensor according to claim 1, characterized in that: The gap between the left Hall sensor (12) and the left measuring gear is 1 to 2 mm, and the gap between the right Hall sensor (13) and the gear ring of the right measuring gear pot is 1 to 2 mm.

7. A measurement method of an amplified phase difference torque and speed sensor, characterized in that: The amplified phase difference torque and speed sensor according to claim 1 comprises the following steps: Step 1: amplifying the torsion angle of the measuring section L of the measuring shaft (6) by means of a speed increasing mechanism; Step 2: The phase difference of the voltage signal measured by the left Hall sensor (12) and the right Hall sensor (13) is used. Based on the calibration relationship between the phase difference and the relative torsion angle between the right measuring tooth basin (18) and the left measuring gear (11), the relative torsion angle between the right measuring tooth basin (18) and the left measuring gear (11) is obtained as follows: in is the torsion angle, i is the transmission ratio of the speed increasing mechanism; Step 3: Calculate the transmission ratio i of the speed increasing mechanism and obtain the torsion angle of the right end of the measuring shaft segment L of the measuring shaft (6) That is, the torsion angle of the right end of the measuring shaft segment L of the measuring shaft (6) relative to the left end is obtained; Step 4: Measure the torsion angle of the right end of the measuring section L of the measuring shaft (6) relative to the left end Calculate and obtain the torque T transmitted by the measuring section L of the measuring shaft (6), that is, obtain the torque measured by the amplified phase difference torque and speed sensor; Step 5: Calculate the rotation speed n of the left measuring gear (11) from the frequency of the voltage signal of the left Hall sensor (12), that is, obtain the rotation speed of the left end of the measuring section L of the measuring shaft (6), that is, obtain the rotation speed measured by the amplified phase difference torque speed sensor; Step 6: The power P transmitted by the measuring section L of the measuring shaft (6) is calculated from the torque T transmitted by the measuring section L of the measuring shaft (6) and the rotation speed n of the left end of the measuring section L of the measuring shaft (6), that is, the power measured by the amplified phase difference torque speed sensor is obtained.

8. A testing system, characterized in that: The invention comprises a speed regulating motor (30), a coupling (31), an input sensor (32), a mechanical transmission (33), an output sensor (34) and a dynamometer (35), wherein the input end of the input sensor (32) is connected to the speed regulating motor (30) through the coupling (31), the output end of the input sensor (32) is connected to the input end of the mechanical transmission (33) through the coupling (31), the output end of the mechanical transmission (33) is connected to the input end of the output sensor (34) through the coupling (31), the output end of the output sensor (34) is connected to the dynamometer (35) through the coupling (31), and the input sensor (32) and the output sensor (34) are both amplified phase difference torque and speed sensors according to any one of claims 1, 2, 4, 5 and 6.

9. A testing system, characterized in that: The invention comprises a speed regulating motor (30), a coupling (31), an input sensor (32), a mechanical transmission (33), an output sensor (34) and a dynamometer (35), wherein the input end of the input sensor (32) is connected to the speed regulating motor (30) through the coupling (31), the output end of the input sensor (32) is connected to the input end of the mechanical transmission (33) through the coupling (31), the output end of the mechanical transmission (33) is connected to the input end of the output sensor (34) through the coupling (31), the output end of the output sensor (34) is connected to the dynamometer (35) through the coupling (31), and the input sensor (32) and the output sensor (34) are both the amplified phase difference torque and speed sensors as claimed in claim 3.

10. A testing system, characterized in that: The invention comprises a speed regulating motor (30), a coupling (31), an input sensor (32), a mechanical transmission (33), an output sensor (34) and a dynamometer (35), wherein the input end of the input sensor (32) is connected to the speed regulating motor (30) through the coupling (31), the output end of the input sensor (32) is connected to the input end of the mechanical transmission (33) through the coupling (31), the output end of the mechanical transmission (33) is connected to the input end of the output sensor (34) through the coupling (31), the output end of the output sensor (34) is connected to the dynamometer (35) through the coupling (31), the input sensor (32) is the amplified phase difference torque speed sensor according to claim 2, the output sensor (34) is the amplified phase difference torque speed sensor according to claim 3, or the input sensor (32) is the amplified phase difference torque speed sensor according to claim 3, and the output sensor (34) is the amplified phase difference torque speed sensor according to claim 2.

Images